This is the front end of the motor ball bearing, copper sets of back-end, 5 groups winding, at a voltage of 24V, torque, low noise.Model: 775Shaft Diameter: 5 mmShaft length: 17 mmBody length: 66.7 mmFront steps diameter: 17.4 mmcompatible withmer high level: 4.7 mmBody diameter: 42 mmMotor Overall Length: 98 mmDiagonal installation pitch: 28.8 mmMounting hole size: Mounting hole: 2Cooling fan: YesRated voltage: 24 VCurrent Rating: 0.16 ARated Speed: 7000 RPMDifferent voltage parameters:DC 12V, current 0.14A, speed 3500RPMDC 18V, current 0.15A, speed 4500RPMDC 24V, current 0.16A, speed 7000RPMDC 30V, current 0.17A, speed 8100RPMDC 36V, current 0.20A, speed 9000RPMMaterial:MetalColour:SilverPackage Included: 1 x 775 MotorNote: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.