#40 17 PIECE ER-40 SPRING COLLET CHUCK SET- NMTB TAPER 40 (SKU: 3900-0540)
Why Choose This ER-40 Set?
Uncompromising Accuracy
When working with tight tolerances, every ten-thousandth of an inch matters. Our ER-40 system is ground to a .0005″ T.I.R., reducing vibration and tool wear while significantly improving the surface finish of your workpieces.
Innovative Self-Releasing System
Forget about stuck collets. The integrated unique self-releasing system ensures that the collet and tool are easily removed from the chuck after the nut is loosened. This saves time, protects your tooling, and keeps your workflow moving smoothly.
Maximum Versatility & Range
With 17 precision-ground collets, this set offers a wide holding range, allowing you to swap between various shank sizes without needing multiple chuck systems. It is the “workhorse” set for all standard milling and drilling operations.
Designed for Your Machine
Shank: #40 Taper (Commonly used in NMTB/NST/CAT setups depending on specific drawbar compatibility).
Gage Length: A compact 2.36″ to maximize your Z-axis work envelope.
Drawbar Thread: Standard 5/8″-11 for secure, easy mounting.
Portability: Includes a heavy-duty fitted case to protect your investment from dust, rust, and accidental drops.
Technical Specifications
| Feature | Specification |
| Collet Series | ER-40 |
| Taper Size | #40 |
| Accuracy | .0005″ (T.I.R.) |
| Gage Length | 2.36″ |
| Drawbar Thread | 5/8″-11 |
| Total Pieces | 17 |
| Shipping Weight | 13 lbs |
