3.5kW ER20 CNC Spindle Motor Air Cooled 220V/380V Four Bearings With 0.01mm Runout High Speed Angular Contact Axial Preload Live Spindle For CNC Routers And Mills

Four-bearing 3.5kW ER20 CNC spindle, single unit
✔️ 220V/380V input, 0-18000 rpm, runout <0.01 mm, ER20

This spindle motor is a high-speed live spindle designed for CNC routers and milling machines. It uses a four-bearing setup with ceramic ball bearings and axial preload to boost stiffness and accuracy for engraving and milling. The compact unit measures about 308 x 104 x 135 mm and runs on 220V, with an ER20 collet for common tooling.

✅ 3.5 kW power output for solid cutting performance
✅ Air-cooled design keeps setup simple and quiet
✅ 0-18000 rpm speed range for fast material removal
✅ Runout under 0.01 mm for tight tolerances
✅ Ceramic bearings: 2x 7005C P4 DB and 2x 7203C P4 DT
✅ ER20 collet compatible with standard end mills
✅ Compact size 308 x 104 x 135 mm
✅ CE certified for safety and reliability
✅ Frequency drive 0-300 Hz capability

💡 What is a CNC spindle unit used for in milling and engraving applications? This handy device powers end mills and tools on CNC routers and mills, delivering precise, high-speed performance. - handy for engraving and milling on a wide range of materials - supports ER20 tooling with tight runout for accuracy - axial preload and ceramic bearings boost stiffness and tool life - works with standard 220V systems and typical frequency controllers