ER20 Spring Collet Chuck 4mm Clamping Diameter, 0.015mm Ultra Precision Tolerance, 40Cr Steel Construction for Durability, Ideal for CNC Engraving, Milling and Lathe Work, High Quality Tooling Set, 2 Pcs

ER20 4mm Spring Collet Chuck, 2-Pack, Ultra-Precise

✔️ 0.015mm tolerance, 40Cr steel, precision ground for CNC engraving

This ER20 Spring Collet Chuck set provides a precise, ready-to-use option for holding small-diameter cutters and drills in CNC mills, lathes, and engraving machines. It’s compatible with standard ER20 collets and is built for durability in metalworking tasks.

✅ Clamping diameter: 4 mm for tight, accurate tool holding
✅ Material: 40Cr steel for durability and wear resistance
✅ Precision: 0.015 mm / 0.0006 inch critical surfaces are ground
✅ Applications: fits manual mills, CNC mills, lathes, engraving machines
✅ Pack size: 2 pieces

💡 What is an ER20 spring collet used for? It’s a compact toolholding solution for securing small-diameter cutters, drills, and other tools in a variety of machining setups. - It fits standard ER20 toolholders
- It provides precise clamping with ground surfaces for minimal runout
- It’s made from 40Cr steel for durability
- It supports high-speed milling and precise engraving