ER20 Collet High-Precision Tool Holding for CNC Spindles & ATC Systems Overview Built for reliable, repeatable tool holding in CNC spindle and ATC applications. Precision-ground and hardened for consistent clamping force and low runout, this ER20 collet helps improve cut quality, tool life, and overall machine performance. Why It Matter
Collet Type
ER20
Material
Hardened precision ground steel
Runout Accuracy
0.0002–0.005 mm
Color
Silver, Gray
Pattern
Solid
Application
CNC routing, carving, and machining
Summarized by Shop
5.0
4 ratings
5
4
3
2
1
Excellent ER20 Collets
I have repeatedly purchased these collets from PwnCNC. I use them with my PwnCNC ATC. I am slowly adding tool holders that I can swap in and out and need a collet for each bit I use regular. I have found they are of a very good quality and I trust them. I highly recommend them.