Lengthened Taper Drill Sleeve Reducing Adapter For CNC Lathe And Milling Machines High Speed Steel MT4 MT3 Precision Ground For 0.015mm Alignment Low Friction Surface Durable Industrial Tool Upgrade

Lengthened MT4 to MT3 drill sleeve for single-unit CNC
✔️ Lengthened MT4→MT3 taper sleeve, 50 HRC steel, 0.015mm alignment

This lengthened taper drill sleeve adapts MT4 tooling to MT3 holders, ideal for high-speed drilling and precision work in CNC lathes and milling centers. It delivers a tight concentric fit and high rigidity for accurate hole alignment.

✅ Precision-ground interior for 0.015mm alignment accuracy
✅ Hardened high-speed steel (50 HRC) for extreme wear resistance
✅ Quenching-treated core to resist deformation under heavy use
✅ Extended length provides deeper reach while maintaining rigidity
✅ Seamless MT4 to MT3 taper transition for concentricity and secure tool holding
✅ Enhanced chip clearance and heat resistance for industrial environments

💡 What is a drill sleeve adapter used for in CNC milling and turning operations? This handy accessory helps adapt taper sizes and improve accuracy in toolholding. - Improves concentricity and rigidity
- Enables MT4 to MT3 taper changes with a secure fit
- Extends reach for deep drilling in CNC centers
- Reduces runout and heat-related wear in high-speed cuts