ER20 6mm Spring Collet Chuck For CNC Milling Lathe And Engraving Machines, Pro Grade Precision 0.015mm Tolerance, Heavy Duty 40Cr Steel Build, Durable Collet For Smooth Milling And Sharp Engraving

ER20 6mm Spring Collet Chuck for CNC Milling & Engraving
✔️ Single 6mm clamping, 40Cr steel, 0.015mm tolerance, smooth runout

This ER20 spring collet chuck is a high-precision tool holder designed for CNC milling, engraving, and small-lathe work. Built from durable 40Cr steel, it securely grips 6mm shanks for reliable milling and engraving results across manual and CNC machines.

✅ 6mm clamping diameter for precise tooling
✅ 40Cr steel body for durability and wear resistance
✅ 0.015mm (0.0006") precision tolerance on critical surfaces
✅ Compatible with manual and CNC milling, drilling, and engraving setups

💡 What is an ER20 spring collet chuck used for in CNC milling and engraving applications?

• Handy for securing 6mm cutters in CNC mills and engravers
• Provides tight clamping with 0.015mm tolerance for accurate cuts
• Durable 40Cr steel body resists wear at high speeds
• Ideal for engraving and milling tasks requiring clean, accurate cuts