When a gripper or toolholder model is withdrawn, searching for the exact code often stalls — the series may be discontinued or the type renamed. The faster route is cross-referencing: capture the force, stroke and interface that define the unit and match them to a current alternative. This guide covers what to read and how to turn it into a replacement specification.
What defines interchangeability
A clamping or gripping unit is defined by what it holds and how. Capture these before looking for a substitute:
| Parameter | Why it matters |
|---|---|
| Gripping force | N or kN the unit develops |
| Stroke | Travel per jaw |
| Fingers | Two-finger (parallel / angular) or three-finger centric |
| Interface | HSK / SK / BT for toolholders; mounting pattern for grippers |
| Actuation | Pneumatic, electric or hydraulic |
| Workpiece | Weight and size the unit must hold |
A photo of the unit with its code is usually enough for a specialist to propose a match.
Notes by unit type
- Quick-change pallet (SCHUNK VERO-S NSE3): the mounting interface on the table.
- Clamping modules (TANDEM): force-actuated, hold the workpiece.
- Chucks (ROTA-S flex): flexible clamping of round parts.
- Toolholders (TRIBOS / TENDO): polygonal or hydraulic, by shank diameter.
- Grippers (PGN-plus / PZN-plus, PSH): two- or three-finger, by force and stroke.
- Tool-clamping units (OTT-JAKOB HSK / SK / PSC / KM4X, rotary union): the spindle side.
How a cross-reference is built
- Record the original code and capture a photo of the unit.
- Note the gripping force, stroke and finger count.
- Confirm the interface (HSK/SK/BT or mounting pattern).
- Match the actuation and the workpiece weight.
- Trial-fit and cycle-test before production use.
Why use a sourcing specialist
A given clamping duty is met by several interfaces and force classes — SCHUNK and OTT-JAKOB cover grippers, chucks and toolholders. A sourcing partner keeps the range on file, checks the candidate against your code, supplies procurement documentation, and can often ship a stocked equivalent within a day or two instead of waiting on a long factory lead time.
Get a quote
If you have a gripper or toolholder code — current or obsolete — send it with a photo. We return a cross-reference suggestion, price and lead time, typically within one business day.
- Browse the SCHUNK clamping range we carry.
- Or go straight to the inquiry form.