*ADVANCED BALANCE TECHNOLOGY - The air cooled spindle motor adopts dynamic balance technology to reduce noise, wear and tear in the operating process. And the manganese constructed collet nut is hardened with high precision, which is not easy to break the knife. *UPGRADED CORE POWER - The spindle motor's upgraded core has superior ceramic ball bearings & an all-copper rotor for sturdiness, high hardness, and long service life. Besides, the precise steel ball retainer is designed to ensure rotating accuracy during high-speed grinding. *HIGH-QUALITY MATERIAL - The 2.2KW spindle motor is made of aluminum alloy for a smooth and rust-proof shell. With two-sided mounting holes, this machine can be conveniently installed and used according to the hole spacing to satisfy your different needs. *POWERFUL COOLING PERFORMANCE - Scientifically designed fan is characterized by low noise and better heat dissipation effect, which effectively improves the stable and smooth operation. It uses air circulation to cool the heat generated by the spindle at high speed. *EXTENSIVE APPLICATION - The CNC spindle motor is mainly used with variable frequency drive or used for engraving machines to carve materials such as wood, stone, metal, etc. ******************************************************************************************************* *Specifications Rated Power: 2.2KW Voltage: 220V Current: 6A Frequency: 400 Hz Collet: ER20 Collet Size (Dia.): 0.005" / 0.02" / 0.24" (0.125 mm / 0.5 mm / 6 mm) Rotating Speed: 24000 rpm Runout Off: 0.015 mm Connection of Spindle End: ER20 0.125"-0.5" (3.175 mm-12.7 mm) Bearing Model: 7005 x 2, 7002 x 2 Cooling: Air-cooled Weight: 18.74 lbs (8.5 kg) Item Dimensions: 4.33" x 11.69" (110 mm x 297 mm) ******************************************************************************************************* *Pakcage Content 1 x 2.2KW Air Cooled Spindle Motor 3 x ER20 Collets 1 x Aviation Plug 2 x Wrenches