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
✔️ 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