4 Pack ER11-A Collet Clamping Nuts For CNC Milling Chuck Holder Lathe Beefy Heavy Duty Precision Ground Hardened 40Cr Steel With Black Oxide Finish Hex Nut Fits ER Tool Handles Boring Cutters Bits And Tooling
✔️ 4x ER11-A clamping nuts; hardened 40Cr steel, black oxide finish
These ER11-A collet nuts are precision-ground, hardened 40Cr steel fasteners designed to fit ER-type tool handles, boring cutters, tool bars, and extension bars in CNC milling and lathe work. This pack includes 4 nuts for ready replacements.
✅ Model: ER11-A
✅ Material: 40Cr steel with black oxide finish
✅ Finish: Precision ground and hardened for accurate clamping
✅ Hole Diameter: 9 mm / 0.35 in; Overall size: 19 x 14 mm / 0.75 in x 0.55 in (D x H)
✅ Includes: 4x clamping nuts; for ER11 Spring Collets
✅ Applications: fits ER-type tool handles, boring cutters, tool bars, extension bars
💡 What is an ER11-A collet nut used for in CNC tooling and tool holder setups?
In short, this nut locks the ER11 collet into the holder, enabling secure tool changes and consistent clamping in milling and turning tasks.
- Handy for replacing worn or damaged hardware in tool holders - Helps maintain precise grip on drills, boring cutters, and bits - Made from hardened 40Cr steel with black oxide for rust resistance - Works with ER11 Spring Collets and ER-type tool handles✝️