ER20 A M25 Collet Nut With Dynamic Balance Holes Built To Last From 40Cr Alloy Steel For Pro Grade CNC Lathe And Milling Tool Holders Compatible With 25mm Thread Diameter 1.5mm Pitch Bright Silver

ER20 A M25 Collet Nut, Balanced Holes, 40Cr Steel (Single)
✔️ 25 mm thread diameter; 1.5 mm pitch; OD 34 mm; thickness 21 mm

This ER20 A M25 collet nut is built for pro-grade CNC lathes and milling tool holders. Made from 40Cr alloy steel, it features dynamic balance holes for smooth rotation and reliable grip. Ideal for ER-style tool holders and a wide range of cutting tools in metalworking and automotive manufacturing.

✅ Material: 40Cr alloy steel, hardened to HRC48-50 for strength
✅ ER20-A(M25) size; 25 mm thread; 1.5 mm pitch; OD 34 mm; thickness 21 mm; hex width 30 mm
✅ Dynamic balance holes for smooth rotation and precision
✅ Compatible with ER-style tool holders and CNC tooling
✅ Use notes: avoid over-tightening; inspect wear and replace damaged parts

💡 What is a collet nut used for in CNC machining?

It secures the cutting tool in the collet and maintains accuracy during machining.

• Handy for ER20 collet systems, compatible with 25 mm tooling
• Helps maintain concentricity and reduce runout during milling or turning
• Made from 40Cr alloy steel with hardened finish for durability
• Torque to specification to avoid collet damage and ensure safety