ER20 A M25 Collet Nut With Dynamic Balance Holes In 40Cr Alloy Steel For CNC Machine Chuck Lathe And Milling Tools Holder Beefy Heavy Duty Durable Black And Bright Silver Finish

ER20 A(M25) Collet Nut with Balanced Holes for CNC
✔️ M25 thread, 34mm nut OD, 21mm thick, 40Cr steel, HRC48-50

This ER20 collet nut is a high-strength, heat-treated fastener designed to secure cutting tools in ER-style tool holders on CNC lathes and milling machines. Made from 40Cr alloy steel with a hardness rating of HRC48-50, it provides reliable clamping under demanding machining conditions. Pack size: 1 piece.

✅ Thread Diameter: 25 mm / 0.98"
✅ Nut Outer Diameter: 34 mm / 1.34"
✅ Thick: 21 mm / 0.83"
✅ Hex Width: 30 mm / 1.18"
✅ Material: 40Cr alloy steel, Hardness HRC48-50
✅ Finish: Black and Bright Silver

💡 What is an ER20 collet nut used for in CNC lathes and milling machines? This handy part locks cutting tools in ER collet systems for precise machining. - Handy for securing tools in ER collet holders - Reduces runout and improves stability during high-speed milling - Made from 40Cr alloy steel with heat treatment for durability - Compatible with ER-style tool holders and extensions