ER50 collet - 8 mm | DIN 6499B - DARMET
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Description
Features and application:
- ER50 collet for tools with a cylindrical shank.
- Collets fit ER50 collet holders.
- ER nuts are used for wedging and clamping the cage.
- The grooves allow for spring-loading of the collet.
- Clamping range: 8.0 - 7.0 mm.
- To tighten the collet nuts, use hook or multi-point ER50 wrench.
Data technical:

| Parameter | Value |
|---|---|
| d | 8 mm |
| D | 50 mm |
| D1 | 52 mm |
| D2 | 46 mm |
| L | 60 mm |
| L1 | 12.6 mm |
| L2 | 8.5 mm |
| L3 | 5.5 mm |
Installation of sleeves in nuts:
|
| ||
| Installing the collet in the holder nut | Collet correctly mounted | Disassembling the collet |
To correctly mount the ER collet in the holder:
- Insert the collet at an angle into the nut
- Hook the collet's groove onto the eccentric or cylindrical projection of the nut (Fig. A)
- Press the collet into the nut (Fig. B)
- Screw the nut with the pressed-in collet onto the holder so that the tool being processed can be clamped


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