ER40 collet - 5 mm - DARMET
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Description
Properties and Application:
- ER40 Collet for tools with a cylindrical shank.
- Collets fit ER40 collet chucks.
- ER40 nuts are used for wedging and clamping the collet.
- Slots allow the collet to spring.
- The ER collet chuck is characterized by a long service life.
- Clamping range: 5.0 - 4.0 mm.
Technical Data:

| Parameter | Value | Unit |
|---|---|---|
| d | 5 | mm |
| D | 40 | mm |
| D1 | 41 | mm |
| D2 | 36.2 | mm |
| L | 46 | mm |
| L1 | 7.66 | mm |
| L2 | 7 | mm |
| L3 | 4.1 | mm |
Mounting Collets in Nuts:
|
| ||
| Mounting the collet in the chuck nut | Collet properly mounted | Removing the collet |
To properly mount the ER collet in the chuck:
- Insert the collet angled into the nut
- Engage the collet slot with 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 chuck so that the tool can be clamped
Maximum clamping diameters depending on the ER collet type:



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