ER40-UM(M50) Collet Clamping Nut With Dynamic Balance Holes For CNC Chucks 50 mm Thread 40Cr Alloy Steel Built Tough For Lathe And Milling Tool Holders

Single ER40-UM(M50) collet nut with balance holes, 50mm
✔️ 50 mm thread (1.97"), nut dia 63 mm (2.48"), 26 mm thick

ER40-UM(M50) collet clamping nut secures ER-style tool collets in CNC lathes, mills, and tool holders, delivering steady grip and precision during machining. This replacement part is built to withstand tough conditions and offers reliable performance in metalworking setups.

✅ High-strength 40Cr alloy steel with hardness HRC48-50 for durability
✅ Thread diameter 50 mm (1.97"), pitch 1.5 mm (0.06")
✅ Nut outer diameter 63 mm (2.48"), thickness 26 mm (1.02")
✅ Balance holes reduce vibration for smoother cutting
✅ Heat-treated after-process for long life in demanding jobs

💡 What is an ER collet nut used for in CNC tooling? This handy accessory helps secure cutting tools in tool holders for precise machining. - Clamps ER-style collets securely in CNC lathes and mills - Made from 40Cr alloy steel with hardness HRC48-50 for durability - Balance holes reduce vibration and improve runout - Compatible with standard ER collet systems for broad use