Heavy Duty ER Collet Extension With Straight Shank Covering C12 To 25 And ER11 To 25 Sizes For CNC Milling Lathes And Precision Metalworking Tradesman Gear

Single forged steel ER collet extension bar for milling
✔️ High hardness straight shank fits ER11 to ER25 collet systems

This heavy duty collet extension bridges gaps between spindle tapers and smaller clamp sets, giving you extra reach for deep-pocket drilling and face milling operations. It mounts securely on CNC routers, lathes, and bench mills where longer tool access prevents chuck interference.

✅ Precision threaded collar allows quick changeover without slippage
✅ Heat treated body withstands continuous heavy cut loads
✅ Smooth outer diameter minimizes runout and chatter marks
✅ Compatible with standard ER11 through ER25 mounting setups

💡 How does a hardened steel colleting extender improve CNC routing accuracy?
This handy extension bridges spindle gaps while locking torque firmly under heavy feed rates.
- Precision ground threads prevent slippage when tapping or drilling angled surfaces.
- Balanced rotation cuts down harmonic chatter for cleaner aluminum passes.
- Straight shank design slips into standard tapered bores without adapter wobble.