CNC Spindle Motor 3kW 220V Air-Cooled, ER20 18000RPM

CNC air-cooled spindle motor delivers stable 3kW power with low runout for cleaner engraving and milling results. Designed with dynamic balancing and four precision bearings, it helps reduce vibration, noise, and heat build-up during long runs. The ER20 collet system supports secure tool holding for consistent cuts, while the air-circulation cooling design keeps performance steady without added plumbing. Built for CNC routers and engraving machines when paired with a suitable frequency converter.

• Delivers 3kW output at up to 18,000 RPM for routing, engraving, and milling tasks


• Reduces chatter with dynamic balance design to help minimize vibration and operating noise


• Supports precision work with runout less than 0.002 mm for smoother finishes


• Includes ER20 collet system for secure clamping and stable tool control


• Runs cooler with air-circulation cooling to support longer duty cycles

Set up a spindle that’s engineered for consistent results when detail matters. This air-cooled CNC spindle motor pairs with a frequency converter to match speed and workload, helping you maintain control across different materials and tool paths. With a compact cylindrical body and durable internal bearing structure, it’s a practical upgrade or replacement for many CNC engraving and milling machines. Keep your workflow moving with reliable power, controlled runout, and efficient cooling—grab yours today.

• Power: 3 kW


• Voltage: 220V


• Current: 10A


• Frequency: 300 Hz


• Speed: 18,000 r/min


• Max torque: 1.1 Nm


• Collet size: ER20


• Bearings: 4


• Runout: < 0.002 mm


• Dimensions: 3 x 11.7 in (7.5 x 29.6 cm)


• Weight: 15.4 lb (7 kg)


• Cooling: Air-cooled


• Use: CNC engraving/milling machines; use with frequency converter