FAQ: Questions and answers. All about clamping technology
General questions
Yes for an order you need to create a customer account in our online store.
This works very simply and within a short time you have created your customer account independently.
You can find the general terms and conditions here:
You can also place your order by phone at +41 52 368 16 16, our competent staff will be happy to advise you.
An order request can also be sent by mail to verkauf@gressel.ch be sent. We will be happy to process your request within the shortest possible time.
We offer a 2-year warranty on all GRESSEL clamping technology products.
When the item is shipped, a printed version of the operating instructions in German and English is always included.
If you would like an electronic user manual, please contact us and we will be happy to send it to you by mail.
Here you can find all our »Sales Engineers
You are also welcome to use our distributor search to find the right contact person.
» To find a distribution partner
Machine vices automatic
It depends on the automation. All GRESSEL clamps are suitable for pallet automation. We often recommend the products C2 centering vise, SC5X 5-axis vise and C3 centering vise.
Yes, 5-axis clamps SC5X, single clamps solinos, machine vice gripos, as well as special clamping solutions.
GRESSEL has developed its own pneumohydraulic unit for this purpose, which is specially adapted to our clamping devices in order to realize an efficient automatic clamping solution.
Workpiece pallet automation R-C2 (hybrid)
Yes, round workpieces with standard prismatic jaws and shaped parts with contour jaws. GRESSEL offers a great option for the production of your own clamping jaws via the simple jaw interface of the R-C2 centric clamps. The C2.0 program includes soft jaws in aluminium and steel as standard.
No, all currently available R-C2 automation solutions have their own software systems, including their own job managers.
Yes, the R-C2 automations have the advantage that the 4 centric clamps R-C 80 (L-140 L-190) and R-C2 125 (L-160 L-235) can be interchanged as required. Workpieces from 0 – 217 mm can be clamped flexibly.
In general, yes, we have the option of automating machines without a rotary feed-through using an R-C2 module including media transfer. However, the existing machine must have an automatic machine door (or be retrofitted). In addition, the machine should also have an automation interface for smooth communication with the automation system. For long unmanned operation, the machine also requires a certain number of tools.
R-C2 integrator (our R-C2 partners), machine manufacturer or the GRESSEL clamping technology experts.
Yes, it can also be operated mechanically using the socket special Torx E16 – 1/2″ (XNF.91109.016) and a torque wrench.
The transfer from OP10 to OP20 is carried out with the robot in our transfer station, the so-called 6-side station. The process and the transfer are completely automatic and thus unmanned.
The clamping range is adjusted with the R-C2 module. The displacement sensor checks exactly where the jaws are located and then moves them to the desired position.
The R-C2 automation is very simple and extremely flexible. You can manufacture raw material workpieces unmanned. It is also possible to mix different clamp sizes.
Your employee saves time at the machine and has much more time for other tasks.
No, there are different robots in the R-C2 automations and R-C2 is not dependent on a robot brand, as the R-C2 module can be easily mounted on the robot using an adapter plate.
Depends on the workpieces, the planned unmanned running time of the machine, etc. As a rule, 4 – 6 R-C2 centric clamps are sufficient.
The clamping force can be infinitely adjusted via the R-C2 Automation software and is between 8 – 30 kN.
No, only the GRESSEL R-C2 clamping vises. These consist of a stainless steel base body and are hardened for long-term use in automation.
No, we supply the components and the integrator / machine manufacturer supplies the complete automation.
On the GRESSEL website – Our R-C2 partners
On the R-C2 website – R-C2.com
On the GRESSEL Automation page – Generation-Automation
No, we supply the components, the complete system is supplied by the integrator or machine manufacturer.
Yes Customer example: Customer story Falser Maschinenbau
Technical terms of the clamping technology
Lifting:
Workpiece moving away from the workpiece support due to the effect of force
Automated clamping technology:
Clamping technology implemented using automation with low personnel deployment
Jaw programm:
Modular system with system and top jaws
Torque:
Force acting on a pivot point under a lever arm (torque = force x lever arm).
Pull-down force:
Force with which e.g. the draw-in bolt is pulled into the quick-release fastener
Eroding:
ablation, thermal ablative manufacturing process for conductive materials
Finished part clamping:
the workpiece is finished in this fixture
Milling:
Cutting manufacturing process with rotating tool
encapsulated spindle:
Spindle, which is fully protected from external influences e.g. chips, cooling emulsion
Grip clamping:
Positive clamping of the blanks in the OP 10
Clamping force:
Force or clamping force with which, for example, a pile is held in the ground.
Lever quick clamping:
Quick clamping by means of lever, in this case with < 160° quick clamping
kN:
Kilonewton, unit for forces (1 kN = approx. 100 kg)
Force transmission box:
a machine element that transmits the applied force
power boosted:
a device that increases the applied force, e.g. mechanical, hydraulic, electric
Magnetic clamping technology:
Clamping technology that holds the workpiece in position by generated magnetic force
Mechanical force transmission:
Process in which the application of force is converted into a higher force by mechanical assistance (transmission ratio)
Pull-down clamping:
plane-parallel workpiece clamping in precision part clamping (without lift-off)
Zero-point clamping technology:
Fast, accurate and simple positioning of components and clamping devices via retractable pins or quick-action clamping fasteners
Surface quality:
Expression for roughness in surface inspection (unit: Ra).
OP 10: (raw parts)
Roughing or blank machining (1st set-up)
OP 20: (finished parts)
Finishing or finished part machining (2nd clamping)
Pneumatic:
of pneumatics, describes the use of compressed air in technology as well as science for the performance of mechanical work
Precision part clamping:
the workpiece is finished in this fixture
Raw part clamping:
OP 10, unmachined workpiece, saw or cast quality
Reduction in set-up times:
Fast conversion of the clamping task and thus higher spindle running times
Quick clamping:
technical feature to clamp a workpiece without losing much time
Quick change:
Reduction of set-up times when changing the clamping situation
Simultaneous processing:
defines the power spectrum via predefined axes, which e.g. 5-axis simultaneous milling = 5 axes, which can be moved during machining
Clamping range:
also called clamping range, defines the distance at which a workpiece can be clamped
Clamping stroke:
is the range between workpiece change position to the firmly clamped workpiece
clamping force:
also called spring force. Force with which the workpiece is clamped in the clamping device
Clamping systems for milling machines:
Clamping device or clamping solution for use in milling machines
Spindle unit:
includes the spindle, together with bearings, seals and the slides
enlarged clamping range position:
VS = increased clamping range, refers to the turned reversible jaw position
Repeatability:
Constant reference or zero points on the workpiece
Centering accuracy:
Constant center of the workpieces with centric clamps
Machining:
Manufacturing process in which a blank material is separated by means of mechanical processing in the form of chips
Drill press vise ecopos
The guide rail is not compatible with the ecopos 72.
The ecopos 72-P, ecopos 80-P and ecopos 100-P have a clamping force of 0.8 – 4 kN. And the ecopos 125-P has a clamping force of 1 – 5.5 kN.
Workbench vice AX/PS
The workshop equipment tools can be found in our online store and can be ordered there.
The lift is height-adjustable and can be rotated through 360°.
Profile Bending Machine HB
The HB 10 and HB 14 can be clamped in the GRESSEL workbench vice. The HB 20 must be clamped directly on the workbench.
Configurator
Yes, once you have decided on a product, customer examples will appear on the right side, which you can view directly and adapt as required.
After configuration, you can click on the parts list or 3D data at the bottom right and download them conveniently.
Click on “Share” at the top right, enter your e-mail address, scan the QR code and you have the configuration on your cell phone and can also forward the link.
The configurator is available in German and English.
Machine vise gripos
Yes, the machine vice gripos can be placed on its side.
Here we recommend our individual customer solutions. Our product specialists will be happy to advise you personally for the best possible recommendations.
Identical hole pattern spacing is available in some cases. For more detailed information, please refer to our catalog Chapter 1 gripos and clamping options.
No, there is no such danger of the spindle jamming or wearing out due to chips. The spindle of the machine vice gripos does not rotate during clamping, but the tie rod in the spindle clamps.
- The clamping force in the base body is tensile (force cartridge is in the base body with fixed jaw)
- No bending of the base body
- Keine zusätzlichen Lasten auf dem Maschinentisch
- Clamping force is built up in the power cartridge and not in the spindle
- No spindle rotation during infeed and clamping process
- Short changeover / conversion times in seconds thanks to separation of power cassette and spindle assembly via plug-in bolts
- Short cleaning time, no jamming of chips
- No angle drive is required
- Quick clamping with lever 160⁰
- Stepless clamping force adjustment from 4 – 40 kN
Machine vise grefors
The use of the machine vice grefors is downright simple. Using the angular drive only changes the position of the crank from horizontal to vertical.
Yes, with a base body extension the clamping range can be increased from 159 mm to 509 mm.
The grefors is a very process-safe machine vice. The infinitely variable force adjustment from 4-60 kN and one turn of the crank ensure repeatability.
You can easily clamp your workpieces today and machine them the next day. Due to the mechanical locking, there is no loss of clamping force.
Alignment is performed by precision sliding blocks and screws through the base body, and with clamping claws on the external clamping shoulders.
Single vise S2
Yes, the outer spindle only rotates when the clamping range is adjusted. The clamping force is built up via the encapsulated tie rod, which is protected in the outer spindle.
We explain this in our catalog on page 218.
» Catalog
✓ Low clamping vise
✓ Low weight
✓ Ideally suited for pallet automation
✓ Clamping width adjustment only via spindle
✓ Complete clamping range can be opened and closed without jaw conversion
✓ No jamming of the spindle
✓ Quick lever clamping at approx. 160°
✓ High repeat accuracy at +/- 0.01 mm
✓ Versatile GRESSEL jaw range
✓ Ideally suited for zero point system due to tie rod principle
✓ Most flexible clamp in this price segment
Single vise solinos
The clamping force of the solinos single clamp is 12-40 kN. For workpiece blank clamping we clearly recommend our GRESSEL grip jaws, selectable in different heights. For finished part clamping, we suggest our GRESSEL Tungsten Carbide coated jaws, as here the coefficient of friction can be increased by 2.5 times.
The maximum clamping ranges are 122-243 mm. The smaller clamping range is realized with jaws that are screwed on vertically. To exploit the maximum clamping range, there is a range of jaws that can be used horizontally.
The jaw widths 65 and 100 mm can be operated hydraulically. If you need something larger, our machine vice gripos is also available in 125 and 160 mm jaw width as a hydraulic version. The entire stroke can be easily adjusted mechanically. With hydraulic stroke, we always have 3-5 mm clamping stroke. All our hydraulic clamping devices are equipped with a mechanical spring return and can be easily operated with our pneumohydraulic pressure booster. Simple design and ideal for those who do not want to invest in an expensive and large hydraulic power unit.
The GRESSEL warranty is generally 24 months or 50,000 clamping cycles. However, experience shows us that our clamping devices last much longer. Due to our close customer proximity on site, technical support can also always be guaranteed.
No, the spindle has a protected structure and therefore no special maintenance is required. Only in case of longer storage outside the machine, we recommend oiling the guideways with some machine oil.
Double clamping vise D2
Yes, as the name suggests, this sophisticated function takes over the missing third hand. This applies a preload to the rear slide and ensures it by means of a compression spring. Your advantage: Insert and tighten two workpieces with only two hands!
The blank machining (OP10) in grip and the finished part machining (OP20) in smooth.
Yes, considerably! Due to the enormous variety of jaws, changeover to another workpiece is very easy.
The nickel-plated base body makes it even easier to clean.
Yes, blocking the rear slide by means of the recessed grub screw turns the double tensioner into a single tensioner. By disassembling the center jaw, a large workpiece can be clamped.
Multigrip
Anywhere you want to generate higher run times. For example, on a 3-axis machining center (BAZ) and a 4-axis horizontal machining center (BAZ).
The machine operator can devote his time to other tasks during the runtime and can run the machine over lunch or at night. The company thus saves resources and can produce more efficiently.
No, the system gets its function and accuracy through the use of precision pads.
Yes, each clamping jaw can be used as a fixed jaw on the reverse side. Thus, several setups can be realized on one clamping rail.
By means of M12 fitting screws and M12 screws directly through the base body or with an adapter plate suitable for the zero point clamping systems gredoc and Vero-S. The clamping rails width 90 can additionally be screwed to the machine table with clamping claws.
Multiple clamping vise M1
The M1 can be used to clamp several round or cubic workpieces as well as one large workpiece.
The connecting element can be used to connect several rails together.
The maximum rail length for the M1 multiple clamp is 650 mm.
The gearing is hardened and ground to ensure maximum precision and dimensional stability.
The M1 is suitable for 3-axis machines, 4-axis machines and 5-axis machines.
Gre4doc plates
A mechanical zero-point clamping system is required to fix workpieces quickly, precisely and repeatably on a machine. It replaces conventional clamping methods with alignment and fixing and brings decisive advantages for production.
- CNC machining centers – 3-axis, 4-axis and 5-axis machines.
- Series production & small series – Efficient conversion between different components.
- Precision manufacturing – Ideal for applications with the highest demands on accuracy and repeatability.
- Automated production processes – integration into pallet systems or robot handling (e.g. GRESSEL R-C2) possible.
The gre4doc zero-point clamping system offers several advantages over traditional clamping methods:
- Quick changeover: Quick and easy changing of the clamping devices significantly reduces set-up times.
- High repeat accuracy: Precise positioning is ensured with a repeat accuracy of less than 0.005 mm.
- Weight optimization: gre4doc multiple clamping system: the use of hard-anodized aluminium base bodies makes the system lighter and more cost-effective. gre4doc plates: plate dimensions optimally matched to the GRESSEL clamping devices so that as many plates as possible can be placed on tables, towers, etc.
- Compatibility: The gauge of 52 mm and 96 mm is compatible with other manufacturers, which increases flexibility.
- Mechanical clamping: No external energy source is required as the voltage is applied mechanically.
- High pull-in force: 17 kN at 30 Nm tightening torque for reliable machining without vibrations during the machining process.
GRESSEL offers various versions of gre4doc plates, including:
- gre4doc plate 1-fold 52 x 52 mm
- gre4doc plate 1-fold 96 x 96 mm
- gre4doc combi plate 52 mm and 96 mm
- gre4doc combi 5-axis extension height = 100 mm (52 x 52 mm and 96 x 96 mm)
- gre4doc combi 5-axis extension height = 60 mm (52 x 52 mm and 96 x 96 mm)
Installation:
- Installation: The gre4doc panels are mounted on machine tables, pyramids, clamping tombstones and consoles. Ensure that the mounting bolts are correctly positioned and secured.
- Alignment: Check the exact alignment of the plate to ensure optimum repeat accuracy.
Maintenance:
- Cleaning: Regular cleaning of the clamping mechanisms and the locating pins to remove dirt and chips.
- Lubrication: If necessary, moving parts should be lightly lubricated to maintain functionality.
The gre4doczero-point clamping system from GRESSEL is characterized by high precision:
- Repeat accuracy: Less than 0.005 mm, which enables extremely precise repetition of the clamping positions.
- Pull-in force: Each locating bolt offers a pull-in force of 17 kN, which ensures safe and stable clamping.
These features make the system ideal for applications that require maximum accuracy.
Gre4doc multiple clamping system
The pull-in force is 15kN with a tightening torque of 30 Nm.
The clamping options include: direct screwing through the base body, onto the gredoc zero-point clamping system or the Vero-S zero-point clamping system from SCHUNK, as well as clamping onto the zero-point clamping systems from competitors via the 52 x 52 and 96 x 96 interfaces.
the pitch of the 4 clamping bolts is 52 x 52 mm and therefore our zero point clamping system is compatible with other manufacturers who also have a pitch of 52 x 52 mm.
The gre4doc zero-point clamping system has a hard-anodized aluminium base body.
Our pyramids, Tombstones and consoles feature an integrated zero-point clamping system. This eliminates both the additional weight and the associated costs, as we do not need a separate zero-point clamping system. We also have a base body made of hard-anodized aluminium.
Gredoc zero-point clamping system
The gredoc zero-point clamping system is the ideal basis for your machine tool. This zero-point clamping system impresses with its simplicity and low overall height. The use of just one clamping bolt is another advantage of this intelligent system. With the gredoc zero-point clamping system, set-up times can be reduced to a minimum.
The zero-point clamping system can be used on milling machines, measuring machines, eroding machines, 3D printing machines and as a fastener in assembly.
It is operated mechanically using a torque wrench with only 30 Nm for 20 kN pull-in force per mounting bolt.
The pull-in force is 20 kN, the holding force on the locating bolt is 65 kN for an M12 bolt and 45 kN for an M10 bolt.
We have very good repeatability. In the worst case, this amounts to a maximum of
< 0.01 mm and the height of the system is 30 mm ± 0.005.
Zero point clamping system gredoc NRS
Each actuating spindle on the operator side of the zero point clamping system is operated with a max. torque of only 30 Nm. This results in a pull-in force of 20 kN for each clamping module.
✓ Manual actuation
✓ No medium (air or oil) required
✓ Extremely easy handling and operation
✓ Low overall height
✓ Central clamping device clamping possible (no intermediate plate required)
✓ Full utilization of the working area of the CNC machine
✓ Easy maintenance and cleaning
✓ Low investment costs
No, the gredoc zero-point clamping system NRS is manual and therefore cannot be automated. However, you achieve a high degree of flexibility with low investment costs, as the zero-point clamping system can be quickly converted.
The base plate is made of stainless steel…
✓ Vacuum hardened
✓ Wear resistant
✓ Standard interface for machine tables
✓ Standardized clamping bolt
✓ Additional integrated grid holes
✓ Full-surface flat contact of the clamping devices and workpieces on the zero point clamping system
✓ Zero point clamping system as monoblock variant
✓ All functional bores are covered or closed
gredoc construction kit
The gredoc modular system is a comprehensive standard program and accessories for the zero point clamping system gredoc and gredoc NRS. For example, there are many different brackets for mounting the C2 centric vise on a 5-axis vise. The multi-adapter plates can be used as intermediate plates for multiple clamping and the gredoc collet chuck is suitable as a clamping system for clamping molded parts and deformation-sensitive workpieces.
✓ Manual actuation
✓ No medium (hydraulics or pneumatics) required
✓ Extremely simple handling and operation
✓ Flat construction -> This results in only minimal loss of processing height…
✓ Full utilization of the working area of the CNC machine
✓ Short maintenance and cleaning intervals
✓ Low to no repair costs
✓ Low investment costs
The gredoc modular system can be used in all 3-, 4- and 5-axis machines. The consoles as substructures for 5-axis machines are also often used in various pallet automation applications.
The standard interface for mounting on the gredoc zero-point clamping system or direct mounting on the machine table is possible. The system is wear-resistant, has a uniform clamping pin and also a full-surface flat contact of the clamping devices and workpieces on the zero-point clamping system. The zero-point clamping system is available as a monoblock version.
5-axis multi clamping pyramids
The use of a pyramid is well suited if you want to machine several components on your 5-axis machine in order to increase machine runtimes. In addition, the pyramid’s optimal design provides very good accessibility for short tools during 5-axis machining.
In the GRESSEL program there are 2-fold, 3-fold and 4-fold pyramids in different sizes and with different angles, suitable for every machine table. Special solutions are also possible on request. We have already realized many different pyramids and our sales technicians will be happy to provide you with detailed advice. We can also very gladly and quickly provide you with 3D data of the desired variant.
The pyramids have fitting and fastening holes so that you can align and fasten the clamping devices directly. You can order all pyramids with our mechanical zero point clamping system gredoc. With the gredoc system you can change the clamping devices very quickly with a repeatability of <0.01 mm.
Our centric clamps C2.0 80, C2.0 125 and our single clamps SC2.0 80, SC2.0 125 and solinos 65 are well suited for the pyramids.
The pyramids have fitting and mounting holes for direct mounting on the machine table. In addition, it is possible to mount the pyramids on our gredoc or gredoc NRS zero point clamping system using mounting bolts (please order separately).
Tombstones
Tombstones are often used on 4-axis horizontal machining centers. Most machines also have an integrated pallet changer, so that a high machine utilization is achieved and thus non-productive time is minimized. Skillfully planned, a workpiece storage system equipped with a clamping tower can be used for fully automated production, in some cases over several days, for example in ghost shifts at the weekend.
In the GRESSEL program there are five different tower shapes in different dimensions (e.g. as double angle tower, triangle tower, cross tower, cube tower etc.). The towers are available with raw clamping surface or with drilling grid. In addition, we offer complete towers that are already equipped with GRESSEL clamping devices and gredoc modules. The towers have a stable hollow body design for high rigidity with good vibration damping. The clamping surfaces are finely milled on all towers.
The Tombstones are available with 50 mm grid holes or with reduced grid suitable for our GRESSEL clamping devices. The grid holes have a double function for simultaneous positioning and fastening of the clamping devices with fitting screws. There are also Tombstones equipped with our gredoc mechanical zero point clamping system. With the gredoc system you can change the clamping devices very quickly with a repeatability of <0.01 mm.
Our Tombstones are suitable for almost all GRESSEL clamping devices. The clamping tombstones are often used with the C2.0 centric clamp and/or in combination with the SC2.0 single clamp for very precise finished part production. Our D2 double clamps, multigrip multiple clamps or our wedge clamping elements are ideal for efficient multiple clamping. Our single vise S2 or our machine vise gripos are also used on towers.
All Tombstones are prepared with standard interfaces and fit on pallets size 400 mm and 500 mm for machine tools according to DIN 55 201 and JIS 6337-1980. Other interfaces can also be manufactured on request.
5-axis clamping vise SC5X
The basic clamping stroke is 130mm without spindle conversion by an extension. This allows a very quick adjustment of the clamping range without losing much time for a spindle change. Together with our quick-change jaws, this is ideal for flexible and easy-to-use component production.
The blank stress is 50 kN and the precision stress is 40 kN (34 kN for the low SC5X version). We recommend taking a look at our extensive quick-change baking range. Here we have all sizes and gradations to adjust very well to the component size and nature of the component. Our experts will be happy to advise you to find the optimal solution.
The clamping force behaves linearly, the force build-up occurs directly without force amplifier by means of torque. The clamping force can be selected via the clamping force diagram and set via the torque wrench.
Yes, this can be implemented in this way without any concerns. However, there is one point to pay attention to: When the tensioner reaches the maximum tensioning stroke, a boundary line or mark appears. This can be seen on the outside diameter and must not be exceeded.
Yes, the SC5X can be tested very gladly and at any time. For this purpose, we ask you to contact your contact person on our homepage.
Our product specialists will be happy to visit you, explain the application and check if this is the right tensioner for your needs. Of course, our sales representatives will be happy to leave the right clamping device at your site for testing.
» Distribution engineer
By clamping the rear support jaw, the part can be manufactured up to and including the 5th side. If higher accuracies are required, it is possible to activate the pull-down by clamping the second carrier jaw, thus enabling very accurate 6-sided machining. We achieve a measurable pull-down here and this at a clamping height of up to 214 mm.
We have base body lengths of 330, 430, 500, 630 and 800 mm in our range.
The clamping range is 4 mm to a maximum of 680 mm. Base body height 175 mm and 214 mm.
Yes, at any time you can simply change the spindle and convert from a mechanical tensioner to a hydraulically controlled tensioner. All SC5X versions are also available in hydraulic version for automation.
In the SC5X, the base body, base jaws and also the quick-change jaws are case-hardened.
5-axis force vise grepos-5X
The continuously adjustable clamping force by means of force adjustment is 5-40 kN. Due to our mechanical power cassette, everything is mechanically locked after actuation. This has the advantage that the clamping force is not lost during roughing. Thus, the grepos-5X is vibration-proof. The clamping force is realized directly on the workpiece by the higher lying spindle. Clamping is very simple with our proven 160° lever quick clamping from the machine vice gripos.
Yes, all system jaws are compatible. All top jaws with 125 mm width can also be used on all GRESSEL clamping devices with 125 mm width. This gives you full flexibility with our large assortment of baked goods.
Yes, this can be implemented without hesitation. The spindle is solidly built. There is also no possibility of opening the spindle too far. This is ensured by means of an anti-rotation device.
Yes, you are very welcome to test the power tensioner at any time. Simply get in touch with your contact person on our homepage.
We will be happy to visit you and check on site whether this is the right clamping device for your needs and, if necessary, leave the right clamping device for you to test on site.
» Distribution engineer
Base body lengths of 265 and 330 mm as fixed jaw variant and clamping ranges from 2 mm to 249 mm. Base body lengths of 330, 430, 500 and 630 mm as sliding fixed jaw variant and clamping ranges from 2 mm to 577 mm.
If the component becomes smaller and the machine is no longer ideal by rotating the respective axes with short tools, then our sliding C variant comes into play. By opening the clamping screw, the complete unit can easily be placed in the center of the turntable. Now accessibility without long tools is possible from all sides. Both variants are available in the following heights: High variant with 214 mm and the low variant with 165 mm.
Base body lengths of 265 and 330 mm as fixed jaw variant and clamping ranges from 2 mm to 249 mm. Base body lengths of 330, 430, 500 and 630 mm as sliding fixed jaw variant and clamping ranges from 2 mm to 577 mm.
Centric vise C2.0
Yes, the 5-axis C2.0 centric vise is a ball-bearing, preloaded and backlash-free spindle bearing that is sealed. The threaded spindle is protected from chips by the encapsulated slide geometry.
There are a variety of options available here. Zero point clamping system locating bolt and gredoc indexing bolt, 2 locating bolts, 12JS precision screws through base body, clamping claws, and the LANG zero point clamping system 96×96 or 52×52.
The C2.0 80 centric vise achieves a clamping force of 25 kN at 90 Nm, the C2.0 125 actuates 35 kN at 100 Nm, and the largest variant of the C2.0 160 clamps an enormous 50 kN.
Yes, the C2.0 centric vises have a simple jaw interface in the slides. The jaws can be easily fixed with 2 screws. The exact jaw interface can be requested from GRESSEL.
No, the GRESSEL top jaws width 125 mm have a height of 40 mm. There are C2.0 system jaws with a height of 40 mm on which the standard GRESSEL top jaws also fit.
Thanks to an extensive range of system jaws and top jaws, there are no limits to the production of different workpieces and sizes.
Yes, whether machining unmachined parts (OP10) with the C2, machining finished parts (OP20) by means of SC2.0 or long workpieces, which can be optimally machined with the specially developed C2.0 floating design.
C3 centring vise
The C3 center clamp allows easy handling with a quick jaw change system without tools.
Yes, the jaw widths are interchangeable between the C3 L-80 and C3 L-100 versions. All jaws with width 45 mm and 70 mm can be used on all clamps.
The quick change results in a pull-down effect. This produces high precision during clamping.
Yes, all C3 quick change jaws are hardened with HRC 54-56.
Yes, due to the light weight, this is a best possible feature for automation. The C3 can be easily mounted on pallets, tombstones & pyramids using the base body.
Increased running time = money saved!
The C3 has a stainless base body. Use in erosion is possible.
General questions
Yes for an order you need to create a customer account in our online store.
This works very simply and within a short time you have created your customer account independently.
You can find the general terms and conditions here:
You can also place your order by phone at +41 52 368 16 16, our competent staff will be happy to advise you.
An order request can also be sent by mail to verkauf@gressel.ch be sent. We will be happy to process your request within the shortest possible time.
We offer a 2-year warranty on all GRESSEL clamping technology products.
When the item is shipped, a printed version of the operating instructions in German and English is always included.
If you would like an electronic user manual, please contact us and we will be happy to send it to you by mail.
Here you can find all our »Sales Engineers
You are also welcome to use our distributor search to find the right contact person.
» To find a distribution partner
Machine vise gripos
Yes, the machine vice gripos can be placed on its side.
Here we recommend our individual customer solutions. Our product specialists will be happy to advise you personally for the best possible recommendations.
Identical hole pattern spacing is available in some cases. For more detailed information, please refer to our catalog Chapter 1 gripos and clamping options.
No, there is no such danger of the spindle jamming or wearing out due to chips. The spindle of the machine vice gripos does not rotate during clamping, but the tie rod in the spindle clamps.
- The clamping force in the base body is tensile (force cartridge is in the base body with fixed jaw)
- No bending of the base body
- Keine zusätzlichen Lasten auf dem Maschinentisch
- Clamping force is built up in the power cartridge and not in the spindle
- No spindle rotation during infeed and clamping process
- Short changeover / conversion times in seconds thanks to separation of power cassette and spindle assembly via plug-in bolts
- Short cleaning time, no jamming of chips
- No angle drive is required
- Quick clamping with lever 160⁰
- Stepless clamping force adjustment from 4 – 40 kN
Machine vise grefors
The use of the machine vice grefors is downright simple. Using the angular drive only changes the position of the crank from horizontal to vertical.
Yes, with a base body extension the clamping range can be increased from 159 mm to 509 mm.
The grefors is a very process-safe machine vice. The infinitely variable force adjustment from 4-60 kN and one turn of the crank ensure repeatability.
You can easily clamp your workpieces today and machine them the next day. Due to the mechanical locking, there is no loss of clamping force.
Alignment is performed by precision sliding blocks and screws through the base body, and with clamping claws on the external clamping shoulders.
Single vise S2
Yes, the outer spindle only rotates when the clamping range is adjusted. The clamping force is built up via the encapsulated tie rod, which is protected in the outer spindle.
We explain this in our catalog on page 218.
» Catalog
✓ Low clamping vise
✓ Low weight
✓ Ideally suited for pallet automation
✓ Clamping width adjustment only via spindle
✓ Complete clamping range can be opened and closed without jaw conversion
✓ No jamming of the spindle
✓ Quick lever clamping at approx. 160°
✓ High repeat accuracy at +/- 0.01 mm
✓ Versatile GRESSEL jaw range
✓ Ideally suited for zero point system due to tie rod principle
✓ Most flexible clamp in this price segment
Single vise solinos
The clamping force of the solinos single clamp is 12-40 kN. For workpiece blank clamping we clearly recommend our GRESSEL grip jaws, selectable in different heights. For finished part clamping, we suggest our GRESSEL Tungsten Carbide coated jaws, as here the coefficient of friction can be increased by 2.5 times.
The maximum clamping ranges are 122-243 mm. The smaller clamping range is realized with jaws that are screwed on vertically. To exploit the maximum clamping range, there is a range of jaws that can be used horizontally.
The jaw widths 65 and 100 mm can be operated hydraulically. If you need something larger, our machine vice gripos is also available in 125 and 160 mm jaw width as a hydraulic version. The entire stroke can be easily adjusted mechanically. With hydraulic stroke, we always have 3-5 mm clamping stroke. All our hydraulic clamping devices are equipped with a mechanical spring return and can be easily operated with our pneumohydraulic pressure booster. Simple design and ideal for those who do not want to invest in an expensive and large hydraulic power unit.
The GRESSEL warranty is generally 24 months or 50,000 clamping cycles. However, experience shows us that our clamping devices last much longer. Due to our close customer proximity on site, technical support can also always be guaranteed.
No, the spindle has a protected structure and therefore no special maintenance is required. Only in case of longer storage outside the machine, we recommend oiling the guideways with some machine oil.
5-axis clamping vise SC5X
The basic clamping stroke is 130mm without spindle conversion by an extension. This allows a very quick adjustment of the clamping range without losing much time for a spindle change. Together with our quick-change jaws, this is ideal for flexible and easy-to-use component production.
The blank stress is 50 kN and the precision stress is 40 kN (34 kN for the low SC5X version). We recommend taking a look at our extensive quick-change baking range. Here we have all sizes and gradations to adjust very well to the component size and nature of the component. Our experts will be happy to advise you to find the optimal solution.
The clamping force behaves linearly, the force build-up occurs directly without force amplifier by means of torque. The clamping force can be selected via the clamping force diagram and set via the torque wrench.
Yes, this can be implemented in this way without any concerns. However, there is one point to pay attention to: When the tensioner reaches the maximum tensioning stroke, a boundary line or mark appears. This can be seen on the outside diameter and must not be exceeded.
Yes, the SC5X can be tested very gladly and at any time. For this purpose, we ask you to contact your contact person on our homepage.
Our product specialists will be happy to visit you, explain the application and check if this is the right tensioner for your needs. Of course, our sales representatives will be happy to leave the right clamping device at your site for testing.
» Distribution engineer
By clamping the rear support jaw, the part can be manufactured up to and including the 5th side. If higher accuracies are required, it is possible to activate the pull-down by clamping the second carrier jaw, thus enabling very accurate 6-sided machining. We achieve a measurable pull-down here and this at a clamping height of up to 214 mm.
We have base body lengths of 330, 430, 500, 630 and 800 mm in our range.
The clamping range is 4 mm to a maximum of 680 mm. Base body height 175 mm and 214 mm.
Yes, at any time you can simply change the spindle and convert from a mechanical tensioner to a hydraulically controlled tensioner. All SC5X versions are also available in hydraulic version for automation.
In the SC5X, the base body, base jaws and also the quick-change jaws are case-hardened.
5-axis force vise grepos-5X
The continuously adjustable clamping force by means of force adjustment is 5-40 kN. Due to our mechanical power cassette, everything is mechanically locked after actuation. This has the advantage that the clamping force is not lost during roughing. Thus, the grepos-5X is vibration-proof. The clamping force is realized directly on the workpiece by the higher lying spindle. Clamping is very simple with our proven 160° lever quick clamping from the machine vice gripos.
Yes, all system jaws are compatible. All top jaws with 125 mm width can also be used on all GRESSEL clamping devices with 125 mm width. This gives you full flexibility with our large assortment of baked goods.
Yes, this can be implemented without hesitation. The spindle is solidly built. There is also no possibility of opening the spindle too far. This is ensured by means of an anti-rotation device.
Yes, you are very welcome to test the power tensioner at any time. Simply get in touch with your contact person on our homepage.
We will be happy to visit you and check on site whether this is the right clamping device for your needs and, if necessary, leave the right clamping device for you to test on site.
» Distribution engineer
Base body lengths of 265 and 330 mm as fixed jaw variant and clamping ranges from 2 mm to 249 mm. Base body lengths of 330, 430, 500 and 630 mm as sliding fixed jaw variant and clamping ranges from 2 mm to 577 mm.
If the component becomes smaller and the machine is no longer ideal by rotating the respective axes with short tools, then our sliding C variant comes into play. By opening the clamping screw, the complete unit can easily be placed in the center of the turntable. Now accessibility without long tools is possible from all sides. Both variants are available in the following heights: High variant with 214 mm and the low variant with 165 mm.
Base body lengths of 265 and 330 mm as fixed jaw variant and clamping ranges from 2 mm to 249 mm. Base body lengths of 330, 430, 500 and 630 mm as sliding fixed jaw variant and clamping ranges from 2 mm to 577 mm.
Centric vise C2.0
Yes, the 5-axis C2.0 centric vise is a ball-bearing, preloaded and backlash-free spindle bearing that is sealed. The threaded spindle is protected from chips by the encapsulated slide geometry.
There are a variety of options available here. Zero point clamping system locating bolt and gredoc indexing bolt, 2 locating bolts, 12JS precision screws through base body, clamping claws, and the LANG zero point clamping system 96×96 or 52×52.
The C2.0 80 centric vise achieves a clamping force of 25 kN at 90 Nm, the C2.0 125 actuates 35 kN at 100 Nm, and the largest variant of the C2.0 160 clamps an enormous 50 kN.
Yes, the C2.0 centric vises have a simple jaw interface in the slides. The jaws can be easily fixed with 2 screws. The exact jaw interface can be requested from GRESSEL.
No, the GRESSEL top jaws width 125 mm have a height of 40 mm. There are C2.0 system jaws with a height of 40 mm on which the standard GRESSEL top jaws also fit.
Thanks to an extensive range of system jaws and top jaws, there are no limits to the production of different workpieces and sizes.
Yes, whether machining unmachined parts (OP10) with the C2, machining finished parts (OP20) by means of SC2.0 or long workpieces, which can be optimally machined with the specially developed C2.0 floating design.
C3 centring vise
The C3 center clamp allows easy handling with a quick jaw change system without tools.
Yes, the jaw widths are interchangeable between the C3 L-80 and C3 L-100 versions. All jaws with width 45 mm and 70 mm can be used on all clamps.
The quick change results in a pull-down effect. This produces high precision during clamping.
Yes, all C3 quick change jaws are hardened with HRC 54-56.
Yes, due to the light weight, this is a best possible feature for automation. The C3 can be easily mounted on pallets, tombstones & pyramids using the base body.
Increased running time = money saved!
The C3 has a stainless base body. Use in erosion is possible.
Double clamping vise D2
Yes, as the name suggests, this sophisticated function takes over the missing third hand. This applies a preload to the rear slide and ensures it by means of a compression spring. Your advantage: Insert and tighten two workpieces with only two hands!
The blank machining (OP10) in grip and the finished part machining (OP20) in smooth.
Yes, considerably! Due to the enormous variety of jaws, changeover to another workpiece is very easy.
The nickel-plated base body makes it even easier to clean.
Yes, blocking the rear slide by means of the recessed grub screw turns the double tensioner into a single tensioner. By disassembling the center jaw, a large workpiece can be clamped.
Multigrip
Anywhere you want to generate higher run times. For example, on a 3-axis machining center (BAZ) and a 4-axis horizontal machining center (BAZ).
The machine operator can devote his time to other tasks during the runtime and can run the machine over lunch or at night. The company thus saves resources and can produce more efficiently.
No, the system gets its function and accuracy through the use of precision pads.
Yes, each clamping jaw can be used as a fixed jaw on the reverse side. Thus, several setups can be realized on one clamping rail.
By means of M12 fitting screws and M12 screws directly through the base body or with an adapter plate suitable for the zero point clamping systems gredoc and Vero-S. The clamping rails width 90 can additionally be screwed to the machine table with clamping claws.
Multiple clamping vise M1
The M1 can be used to clamp several round or cubic workpieces as well as one large workpiece.
The connecting element can be used to connect several rails together.
The maximum rail length for the M1 multiple clamp is 650 mm.
The gearing is hardened and ground to ensure maximum precision and dimensional stability.
The M1 is suitable for 3-axis machines, 4-axis machines and 5-axis machines.
Gre4doc plates
A mechanical zero-point clamping system is required to fix workpieces quickly, precisely and repeatably on a machine. It replaces conventional clamping methods with alignment and fixing and brings decisive advantages for production.
- CNC machining centers – 3-axis, 4-axis and 5-axis machines.
- Series production & small series – Efficient conversion between different components.
- Precision manufacturing – Ideal for applications with the highest demands on accuracy and repeatability.
- Automated production processes – integration into pallet systems or robot handling (e.g. GRESSEL R-C2) possible.
The gre4doc zero-point clamping system offers several advantages over traditional clamping methods:
- Quick changeover: Quick and easy changing of the clamping devices significantly reduces set-up times.
- High repeat accuracy: Precise positioning is ensured with a repeat accuracy of less than 0.005 mm.
- Weight optimization: gre4doc multiple clamping system: the use of hard-anodized aluminium base bodies makes the system lighter and more cost-effective. gre4doc plates: plate dimensions optimally matched to the GRESSEL clamping devices so that as many plates as possible can be placed on tables, towers, etc.
- Compatibility: The gauge of 52 mm and 96 mm is compatible with other manufacturers, which increases flexibility.
- Mechanical clamping: No external energy source is required as the voltage is applied mechanically.
- High pull-in force: 17 kN at 30 Nm tightening torque for reliable machining without vibrations during the machining process.
GRESSEL offers various versions of gre4doc plates, including:
- gre4doc plate 1-fold 52 x 52 mm
- gre4doc plate 1-fold 96 x 96 mm
- gre4doc combi plate 52 mm and 96 mm
- gre4doc combi 5-axis extension height = 100 mm (52 x 52 mm and 96 x 96 mm)
- gre4doc combi 5-axis extension height = 60 mm (52 x 52 mm and 96 x 96 mm)
Installation:
- Installation: The gre4doc panels are mounted on machine tables, pyramids, clamping tombstones and consoles. Ensure that the mounting bolts are correctly positioned and secured.
- Alignment: Check the exact alignment of the plate to ensure optimum repeat accuracy.
Maintenance:
- Cleaning: Regular cleaning of the clamping mechanisms and the locating pins to remove dirt and chips.
- Lubrication: If necessary, moving parts should be lightly lubricated to maintain functionality.
The gre4doczero-point clamping system from GRESSEL is characterized by high precision:
- Repeat accuracy: Less than 0.005 mm, which enables extremely precise repetition of the clamping positions.
- Pull-in force: Each locating bolt offers a pull-in force of 17 kN, which ensures safe and stable clamping.
These features make the system ideal for applications that require maximum accuracy.
Gre4doc multiple clamping system
The pull-in force is 15kN with a tightening torque of 30 Nm.
The clamping options include: direct screwing through the base body, onto the gredoc zero-point clamping system or the Vero-S zero-point clamping system from SCHUNK, as well as clamping onto the zero-point clamping systems from competitors via the 52 x 52 and 96 x 96 interfaces.
the pitch of the 4 clamping bolts is 52 x 52 mm and therefore our zero point clamping system is compatible with other manufacturers who also have a pitch of 52 x 52 mm.
The gre4doc zero-point clamping system has a hard-anodized aluminium base body.
Our pyramids, Tombstones and consoles feature an integrated zero-point clamping system. This eliminates both the additional weight and the associated costs, as we do not need a separate zero-point clamping system. We also have a base body made of hard-anodized aluminium.
Gredoc zero-point clamping system
The gredoc zero-point clamping system is the ideal basis for your machine tool. This zero-point clamping system impresses with its simplicity and low overall height. The use of just one clamping bolt is another advantage of this intelligent system. With the gredoc zero-point clamping system, set-up times can be reduced to a minimum.
The zero-point clamping system can be used on milling machines, measuring machines, eroding machines, 3D printing machines and as a fastener in assembly.
It is operated mechanically using a torque wrench with only 30 Nm for 20 kN pull-in force per mounting bolt.
The pull-in force is 20 kN, the holding force on the locating bolt is 65 kN for an M12 bolt and 45 kN for an M10 bolt.
We have very good repeatability. In the worst case, this amounts to a maximum of
< 0.01 mm and the height of the system is 30 mm ± 0.005.
Zero point clamping system gredoc NRS
Each actuating spindle on the operator side of the zero point clamping system is operated with a max. torque of only 30 Nm. This results in a pull-in force of 20 kN for each clamping module.
✓ Manual actuation
✓ No medium (air or oil) required
✓ Extremely easy handling and operation
✓ Low overall height
✓ Central clamping device clamping possible (no intermediate plate required)
✓ Full utilization of the working area of the CNC machine
✓ Easy maintenance and cleaning
✓ Low investment costs
No, the gredoc zero-point clamping system NRS is manual and therefore cannot be automated. However, you achieve a high degree of flexibility with low investment costs, as the zero-point clamping system can be quickly converted.
The base plate is made of stainless steel…
✓ Vacuum hardened
✓ Wear resistant
✓ Standard interface for machine tables
✓ Standardized clamping bolt
✓ Additional integrated grid holes
✓ Full-surface flat contact of the clamping devices and workpieces on the zero point clamping system
✓ Zero point clamping system as monoblock variant
✓ All functional bores are covered or closed
gredoc construction kit
The gredoc modular system is a comprehensive standard program and accessories for the zero point clamping system gredoc and gredoc NRS. For example, there are many different brackets for mounting the C2 centric vise on a 5-axis vise. The multi-adapter plates can be used as intermediate plates for multiple clamping and the gredoc collet chuck is suitable as a clamping system for clamping molded parts and deformation-sensitive workpieces.
✓ Manual actuation
✓ No medium (hydraulics or pneumatics) required
✓ Extremely simple handling and operation
✓ Flat construction -> This results in only minimal loss of processing height…
✓ Full utilization of the working area of the CNC machine
✓ Short maintenance and cleaning intervals
✓ Low to no repair costs
✓ Low investment costs
The gredoc modular system can be used in all 3-, 4- and 5-axis machines. The consoles as substructures for 5-axis machines are also often used in various pallet automation applications.
The standard interface for mounting on the gredoc zero-point clamping system or direct mounting on the machine table is possible. The system is wear-resistant, has a uniform clamping pin and also a full-surface flat contact of the clamping devices and workpieces on the zero-point clamping system. The zero-point clamping system is available as a monoblock version.
5-axis multi clamping pyramids
The use of a pyramid is well suited if you want to machine several components on your 5-axis machine in order to increase machine runtimes. In addition, the pyramid’s optimal design provides very good accessibility for short tools during 5-axis machining.
In the GRESSEL program there are 2-fold, 3-fold and 4-fold pyramids in different sizes and with different angles, suitable for every machine table. Special solutions are also possible on request. We have already realized many different pyramids and our sales technicians will be happy to provide you with detailed advice. We can also very gladly and quickly provide you with 3D data of the desired variant.
The pyramids have fitting and fastening holes so that you can align and fasten the clamping devices directly. You can order all pyramids with our mechanical zero point clamping system gredoc. With the gredoc system you can change the clamping devices very quickly with a repeatability of <0.01 mm.
Our centric clamps C2.0 80, C2.0 125 and our single clamps SC2.0 80, SC2.0 125 and solinos 65 are well suited for the pyramids.
The pyramids have fitting and mounting holes for direct mounting on the machine table. In addition, it is possible to mount the pyramids on our gredoc or gredoc NRS zero point clamping system using mounting bolts (please order separately).
Tombstones
Tombstones are often used on 4-axis horizontal machining centers. Most machines also have an integrated pallet changer, so that a high machine utilization is achieved and thus non-productive time is minimized. Skillfully planned, a workpiece storage system equipped with a clamping tower can be used for fully automated production, in some cases over several days, for example in ghost shifts at the weekend.
In the GRESSEL program there are five different tower shapes in different dimensions (e.g. as double angle tower, triangle tower, cross tower, cube tower etc.). The towers are available with raw clamping surface or with drilling grid. In addition, we offer complete towers that are already equipped with GRESSEL clamping devices and gredoc modules. The towers have a stable hollow body design for high rigidity with good vibration damping. The clamping surfaces are finely milled on all towers.
The Tombstones are available with 50 mm grid holes or with reduced grid suitable for our GRESSEL clamping devices. The grid holes have a double function for simultaneous positioning and fastening of the clamping devices with fitting screws. There are also Tombstones equipped with our gredoc mechanical zero point clamping system. With the gredoc system you can change the clamping devices very quickly with a repeatability of <0.01 mm.
Our Tombstones are suitable for almost all GRESSEL clamping devices. The clamping tombstones are often used with the C2.0 centric clamp and/or in combination with the SC2.0 single clamp for very precise finished part production. Our D2 double clamps, multigrip multiple clamps or our wedge clamping elements are ideal for efficient multiple clamping. Our single vise S2 or our machine vise gripos are also used on towers.
All Tombstones are prepared with standard interfaces and fit on pallets size 400 mm and 500 mm for machine tools according to DIN 55 201 and JIS 6337-1980. Other interfaces can also be manufactured on request.
Machine vices automatic
It depends on the automation. All GRESSEL clamps are suitable for pallet automation. We often recommend the products C2 centering vise, SC5X 5-axis vise and C3 centering vise.
Yes, 5-axis clamps SC5X, single clamps solinos, machine vice gripos, as well as special clamping solutions.
GRESSEL has developed its own pneumohydraulic unit for this purpose, which is specially adapted to our clamping devices in order to realize an efficient automatic clamping solution.
