ER25 collet sleeve - 7 mm - DARMET
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Description
Properties and Applications:
- ER25 Collet for tools with cylindrical shanks.
- Collets fit into ER25 collet chucks.
- ER25 nuts are used for wedging and tightening the sleeve.
- Slots allow the collet to flex.
- Clamping range: 7.0 - 6.0 mm.
Technical Data:

| Parameter | Value | Unit |
|---|---|---|
| d | 7 | mm |
| D | 25 | mm |
| D1 | 26 | mm |
| D2 | 22.0 | mm |
| L | 34.0 | mm |
| L1 | 6.66 | mm |
| L2 | 5.0 | mm |
| L3 | 3.1 | mm |
Assembly of Collets in Nuts:
|
| ||
| Installing the collet into the chuck nut | Collet properly installed | Removing the collet |
To properly install the ER collet in the chuck, perform the following:
- Insert the collet at an angle into the nut.
- Hook the collet's groove onto the eccentric or cylindrical notch of the nut (fig. A).
- Press the collet into the nut (fig. B).
- Screw the nut with the pressed collet onto the chuck so that the tool to be clamped can be secured.
Maximum clamping diameters based on ER collet type:



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