ER25 collet sleeve - 6 mm - DARMET
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Description
Properties and Applications:
- ER25 collet for tools with cylindrical shank.
- The collets fit ER25 clamping holders.
- ER25 nuts are used to wedge and clamp the chuck.
- Slots allow the collet to spring.
- Clamping range: 6.0 - 5.0 mm.
Technical Data:

| Parameter | Value | Unit |
|---|---|---|
| d | 6 | 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:
|
| ||
| Assembly of collet in the holder nut | Collet correctly installed | Disassembly of collet |
To properly install the ER collet in the holder, you must:
- Insert the collet at an angle into the nut.
- Hook the collet's groove onto the eccentric or cylindrical protrusion of the nut (fig. A).
- Press the collet into the nut (fig. B).
- Screw the nut with the pressed collet onto the holder so that the tool can be clamped.
Maximum clamping diameters depending on ER collet type:



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