Technical Information – Collet Holders
ER Collet Holders
- All holders will be supplied with clamping nut (standard)
- Holders with “AK” will be supplied with sealed nut type Rego-fix
- Runout accuracy ER Collet holders < 5μ
- List of abbreviations:
IK
Axial inner coolant inlet
AK
Radial inner coolant inlet
WD
Throughout flat
FL
No throughout flat
T
Especially for TORNOS machines
OS
Without inner stop screw
Thread inner coolant lead in abbreviations:
AK0
M12 x 1.5 (F)
AK1
G 1/8″ (F)
AK2
M8 x 1 (F)
AK3
M10 x 1 (F)
B = Smallest hole diameter
Collet Holders: Overlap of Nuts
| Nut | G | LA |
|---|---|---|
| ER08M | M10 x 0.75 | 4.3 - 6.1 |
| ER11M | M13 x 0.75 | 5.7 - 7.5 |
| ER16M | M19 x 1 | 8 - 11.5 |
| ER20M | M24 x 1 | 8 - 11.5 |
| ER25M | M30 x 1 | 8.5 - 12 |
| —- | —- | —- |
| UM/ER11 | M14 x 0.75 | 4.9 - 6.6 |
| UM/ER16 | M22 x 1.5 | 7 - 10.5 |
| UM/ER20 | M25 x 1.5 | 8 - 11.5 |
| —- | —- | —- |
| UX/ER16 | M22 x 1.5 | 7 - 10.5 |
| UX/ER20 | M25 x 1.5 | 8 - 11.5 |
| UM/ER25 | M32 x 1.5 | 8.5 - 12 |
| UM/ER32 | M40 x 1.5 | 9.5 - 13 |
| UM/ER40 | M50 x 1.5 | 11.5 - 15 |
| UM/ER50 | M64 x 2.0 | 14 - 21 |