Clamping jaws assortment

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GRESSEL clamping technology
The right clamping jaws for every workpiece

Largest clamping jaw program on the market. Over 130 top jaws in jaw widths 22 / 40 / 65 / 80 / 100 / 125 / 160 mm. Many of our high-quality jaws are of course compatible with our GRESSEL clamping systems. We always have the right clamping jaw for you!

GRIP jaws for all materials
Coated jaws for finished part clamping
First and second side clamping
Workpiece blank clamping with GRESSEL spring leaf pull-down jaws
Rational multiple clamping with floating center jaws
Two-sided machining with precision pull-down jaws
Top jaw system modular gressel

Modular system for the jaw range
for GRESSEL clamping devices

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Higher cutting performance and stability

GRIP jaws for all materials

Spannbacken aluminium

Soft aluminum and plastic

  • low denting
  • gentle for soft material
spannbacken ungehärtetes Material

Unhardened material (up to 22 HRC)

  • concave milled profile
  • hardened and burnished
Spannbacken gehärtetes material

Hardened material (up to 58 HRC)

  • patented carbide-grip jaws
  • Carbide pins 92 HRC
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Combined positive and non-positive clamping

Workpiece blank clamping with GRESSEL GRIP jaws GRIP jaws

Advantages

  • reduced production and unit costs
  • shortened throughput times
  • Low material loss by reducing the clamping depth to, for example, 3 mm
  • high retention forces: Increase compared to standard top jaws by a factor of 3 to 5
  • no breakout of grip teeth due to stable, geometrically supported profile
  • Blanks with very hard scale layer can be clamped securely without wear of the profile
  • the concave shape of the teeth creates a large-surface connection between the workpiece and the profile
  • Vibration-resistant due to optimum combination between high clamping force, positive locking and profile geometry
  • no additional operation and no embossing station necessary, as the embossing takes place during clamping

Design

  • hardened and burnished
  • concave milled profile (outer jaw ends contact the workpiece first)
Stufenbacke grip Spanntechnik
Step jaw grip (3, 5, 8 mm)
Spannbacke grip Schraubstock
jaw grip
Backenform Zeichnung
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Comparison coated and smooth jaw

Finished part clamping with GRESSEL coated jaws

Advantages

  • Increase of the friction factor
  • Increase the holding force
  • Lower clamping forces required
  • No deformation on delicate workpieces with low wall thicknesses
  • Material properties remain unchanged
  • high wear resistance of the tungsten carbide coating
  • shock and abrasion resistant
Stufenbacke

Stepped jaw coated

  • Stiction approx. 0.25
  • Factor 1.5 – 2.5 increased coefficient of friction (μ)
    compared to the smooth stepped jaw

Care should be taken with soft aluminum alloys, as these clog the pores and thus reduce the effect of adhesion.

Stufenbacke

Stepped smooth jaw

  • Stiction approx. 0.1
  • Due to the ground surface a lower coefficient of friction
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First and second side clamping

Complete machining of the workpiece without changing jaws

Advantages

  • Setup time savings
  • Cost-effective
  • low denting
Step jaw 18 mm and 3 mm grip
Stufenbacke mit grip 3mm

Quick changeover for different machining operations

Advantages

  • fast and absolutely repeatable position fixation
  • Time-consuming handling of support strips is eliminated
Clamping jaw with positioning pins
Spannbacke mit Positionierstiften
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3 uses with only one jaw

Workpiece blank clamping with GRESSEL step jaws grip with T-slot

Use as stepped jaw grip
At 6.5 mm (instead of 2.5 mm), the support depth of the step for the workpiece support is significantly deeper than with the standard grip stepped jaws. This means that there is sufficient workpiece support even for workpieces with unclean edges, e.g. rolled raw material or castings.

Use as stepped jaw grip with integrated side stop

  • With transverse T-slot to accommodate the positioning bar
  • the positioning bar can be used as an integrated side stop by appropriate machining
  • with two set screws M8 the positioning bar can be clamped in the T-slot
  • the step jaws are engraved on the upper side, centered «0»
  • Line graduation 2 mm, as positioning aid
  • the positioning bars are made of case-hardened steel 1.7131 and can be hardened by the customer if required

Use with different clamping depths

  • the positioning bar is inserted, e.g. in the grip 8 mm step jaw, and the top side is milled off by 4 mm. This results in a grip jaw with a clamping depth of only 4 mm.
Stufenbacke grip mit T-Nut
Stepped jaw grip with T-slot
Positionierleiste Spannbacken
Positioning bar incl. 2 M8 grub screws
gripos mit Stufenbacke grip
gripos mit Stufenbacke grip und Anschlagleiste
gripos Stufenbacke mit Werkstück
gripos mit Stufenbacke grip
doubble dash gressel

Workpiece blank clamping with GRESSEL spring leaf pull-down jaws

With the use of GRESSEL spring-loaded pull-down jaws, workpieces with raw clamping surfaces can be securely clamped onto the workpiece support.
(the spring blade makes an impression in the workpiece).

Advantages

  • Vibration problems and insufficient seating of the workpiece can be easily solved by using spring-blade pull-down jaws
  • the elastic spring steel blades press the workpiece onto the base of the vise with high force during clamping
  • the spring steel blades are interchangeable
  • the spring steel blades can be milled out and adapted to the workpiece contour

Design

  • Spring-loaded pull-down jaws increase precision. By dividing the clamping force into a horizontal and vertical component
    the workpiece is pressed onto the support surface without play.
Zeichnung Federblatt
Federblatt Niederzugbacke
OP 1 + OP 2 with spring blades parallel milling
Backen gripos ohne Federblatt
OP 3 + OP 4 without spring blades
Federblatt Niederzugbacke
Spring blade pull-down jaw (clamping depth min. 10 mm)

Pull-down jaws increase precision

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Second-side machining with precision low-pull jaws

Advantages

  • Protection against contamination due to integrated wiper
  • Minimum clamping depth of 3 mm possible
  • For workpieces with sensitive clamping surfaces (no impressions)
Präzisions Niederzugbacke
Precision pull-down jaw
doubble dash gressel

Rational multiple clamping with floating center jaws

With the use of floating intermediate jaws, the working space of machines is better utilized.

Advantages

  • the increase in machine running times enables multiple machine operation
  • complex milled parts can be machined all around
  • all workpieces are clamped with the same clamping force
  • efficient and economical
  • minimal setup effort and low investment costs

Design

  • easy and quick swiveling
  • intermediate jaws for gripos, grefors, multigrip
  • top jaws can be screwed on from both sides
  • incl. groove on both sides for spring blades
Zwischenbacke mit T-Nut
Intermediate jaw with groove, incl. 2 spring leaves
Zwischenbacke mit grip

Intermediate jaw equipped with 2 grip jaws

gripos Zwischenbacke einbau
gripos mit Zwischenbacke
gripos mit zwei Werkstücken gespannt
2 workpieces clamped with gripos 125 (1 intermediate jaw and 2 sets of workpiece supports)
doubble dash gressel

Second side machining with spring plate pull-down jaws

Federblech-Niederzugbacke
Spring plate pull-down jaw
Zeichnung Federblech-Niederzugbacke

Advantages

  • Cost-effective
  • For workpieces with sensitive clamping surfaces (no impressions)
  • rust resistant
  • Safe pull-down as with the spring leaf pull-down jaws for blanks
  • Safe pull-down as with the spring leaf pull-down jaws for blanks
  • min. Clamping depth of the workpieces:
    Jaw width 65 mm = 6 mm
    Jaw width 80 mm = 11 mm (C2.0 + S2 + D2)*
    Jaw width 100 mm = 8 mm
    Jaw width 125 mm = 8 mm
    Jaw width 125 mm = 13 mm (C2.0 + S2 + D2)*
    Jaw width 160 mm = 10 mm
    Jaw width 160 mm = 13 mm (C2.0 + S2)*

* With C2.0 + S2 + D2, the reversible jaws grip have a 3 mm integrated step. For these clamping devices, you need spring blade pull-down jaws with 3 mm lower overall height.

doubble dash gressel
Clamping jaws-assortment for every task
Logo GRESSEL AG blau
GRESSEL AG · Schützenstrasse 25 · CH-8355 Aadorf · verkauf@gressel.ch · +41 52 368 16 16​
GRESSEL AG · Schützenstrasse 25 · CH-8355 Aadorf · verkauf@gressel.ch · +41 52 368 16 16​
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Get in touch with us.

GRESSEL AG | Schützenstrasse 25 | CH – 8355 Aadorf
P
+41 52 368 16 16 | E verkauf@gressel.ch

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Clamping device
Testing

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GRESSEL AG | Schützenstrasse 25 | CH – 8355 Aadorf

P+41 52 368 16 16 | E verkauf@gressel.ch

Contact form

Get in touch with us.

GRESSEL AG | Schützenstrasse 25 | CH – 8355 Aadorf
P
+41 52 368 16 16 | E verkauf@gressel.ch