1.The 250SP got a wider high efficiency operating range. Especially it still have the above average torque output while high load. The 250 SP is suitable for constantly change loading and speed operations. 2.The 250SP motor armature had a special balance adjust to improve the serious shaking problem that other tiny motors have. 3.Maintenance free, high torque, high efficiency, low temperature variant, stable and quiet. 4.Japanese made high-speed ball bearings, powerful magnetic outrunner rotor.
