ER25 Collet Nut for CNC Milling, single piece, 42mm length
✔️ 18mm body, 11.5mm dia, ER11, 9mm D1, 2mm B, 1/4in shank, 1pc

This high-precision spring nut secures tool holders in CNC milling centers and milling machines, providing stronger rigidity and reducing vibration for better cut quality. Pack size: 1 piece.

✅ 11.5mm diameter
✅ 18mm overall length
✅ ER11 collet standard
✅ 9mm D1
✅ 2mm B
✅ 1/4in shank
✅ Tight tolerance spring nut for CNC tool holders and milling machines

💡 What is an ER collet nut used for in CNC milling and toolholding setups?

Here's a handy answer in quick bullets:

- Improves tool retention and minimizes runout in CNC milling operations. - Helps keep collets aligned and reduces vibration for longer tool life. - Commonly paired with ER-compatible tool holders on machining centers.