Feature: 1. HIGH POWER: Air cooled spindle motor kit, the driver maximum power is 600W, and the brushless motor power is 700W. 2. GOOD PROTECTION: The drive inverter adopts perfect error and short circuit start protection to reduce machine damage. 3. EXCELLENT MATERIAL: The shell is made of aluminum alloy and ABS, which has glossy surface and is not easy to corrode or rust. 4. EFFICIENT COOLING: Powerful fan cools effective heat, prolongs the life of the spindle motor, efficient and durable. 5. ROTATION SPEED: With standard ER11A collet, drive speed is 12000rpm and motor rotation speed is 13000rpm. Specification: Item Type: Air Cooled Spindle Motor Kit Product Material: Aluminum Alloy + ABS Driver: Model: NBD600M2 Maximum Power: 600W Maximum Speed: 12000rpm Mounting Size: 120 x 55mm / 4.7 x 2.2in Motor: Speed: 13000rpm Collet: ER11A . Package List: 1 x Driver1 x Motor 1 x Network Cable1 x Panel Note: Pay attention to electricity safety and use the correct voltage.