Collet Chucks
Collet chucks for matching ER, SK and related collet systems in CNC machining centres.
Technical Product Information
Collet chucks connect the machine spindle interface to the selected collet system. Buyer enquiries should include spindle taper, collet series, gauge length, coolant requirement and balance expectations.
Verified ER and SK chuck families cover common HSK-A, BT, NBT and SK machine interfaces, with published runout and balancing options.
Technical Specifications
| Specification | Current published information |
|---|---|
| Product category | Tool holders |
| Model or series | ER and SK precision collet chuck families |
| Applicable standard | DIN 69893 HSK-A; JIS B 6339 BT/NBT; DIN 69871 SK |
| Runout or accuracy specification | ER chucks: internal taper-to-shank runout ≤0.003 mm; SK chuck assemblies: total runout ≤0.005 mm at 4×d |
| Clamping range | ER systems: 1-26 mm; SK systems: 3-25 mm, depending on chuck and collet series |
| Collapse range | Depends on collet series |
| Available sizes | HSK-A50/63/100; BT30/40/50; NBT30; SK30/40 across listed ER and SK configurations |
| Surface finish | Collet-chuck nuts receive a special surface treatment for clamping stability |
| Packaging | Standard export packaging; private-label packaging subject to confirmation |
| OEM availability | Available subject to drawing, quantity and engineering review |
| Private-label availability | Available subject to quantity and packaging review |
| Custom manufacturing availability | Available subject to drawing or sample review |
| ER chuck balancing | G6.3 at 15,000 rpm standard; G2.5 at 25,000 rpm optional |
| NBT chuck balancing | G2.5 at 25,000 rpm standard |
| SK chuck balancing | G2.5 at 25,000 rpm standard |
| Coolant | Internal coolant design |
| Axial adjustment | Optional axial adjustment screw on listed ER chuck models |
| SK chuck nut | Low-air-resistance nut supplied as standard |
Applications
- Milling
- Drilling
- Reaming
- Boring
Compatible Equipment
- ER collets
- SK collets
- CNC machining centres
Inspection and Quality Control
Dimensional inspection, runout verification, hardness testing and surface inspection can be agreed based on the order requirement. No unverified tolerance is presented as confirmed on this page.
Review quality-control processOEM and Private Label
OEM production, private-label packaging and custom manufacturing are available subject to drawing, quantity, marking and documentation review.
OEM and private-label optionsRelated Products
Related Technical Resources
Frequently Asked Questions
What information is needed for a collet chuck quote?
Send spindle taper, collet series, gauge length, coolant requirement, balance requirement and order quantity.
What balance grades are available?
Listed ER chucks are supplied at G6.3 at 15,000 rpm, with G2.5 at 25,000 rpm available; listed SK chucks use G2.5 at 25,000 rpm.
Send Collet Chucks Requirements
Include model, size, quantity, tolerance, packaging requirements and drawings where available.