ER25 collet sleeve - 13 mm - DARMET
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Description
Properties and Application:
- ER25 Collet Sleeve for tools with cylindrical shank.
- The sleeves fit ER25 collet chucks.
- ER25 nuts are used for wedging and clamping the collet.
- Grooves allow the sleeve to spring.
- Clamping range: 13.0 - 12.0 mm.
Technical Data:

| Parameter | Value | Unit |
|---|---|---|
| d | 13 | 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 |
Installing Sleeves in Nuts:
|
| ||
| Installing the collet sleeve in the chuck nut | Correctly installed sleeve | Removing the collet sleeve |
To properly install the ER collet sleeve into the chuck, you should:
- Insert the sleeve at an angle into the nut.
- Hook the groove of the sleeve over the eccentric or cylindrical protrusion of the nut (Fig. A).
- Press the sleeve into the nut (Fig. B).
- Screw the nut with the pressed-in sleeve onto the chuck so that the tool to be worked on can be clamped.
Maximum clamping diameters depending on the ER collet type:



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