Features 1、Double ball bearings at both front and rear. 2、Large torque, high revolution speed. 3、Low starting current, stable and efficient. 4、Metal outer case, anti-rust and durable. 5、Operating voltage is DC 12-24V. Specification Item Type: Motor Measured Parameters (for reference): 12V: No-load current: 0.92A, Stall current: 2.6A, No load speed: 10000rpm, load speed: 8800rpm 24V: No-load current: 1.46A, Stall current: 2.9A, No load speed: 20000rpm, load speed: 17600rpm Motor Step Height: 4.5mm Motor Step Diameter: 17.5mm Output Shaft Length: 16mm (Shaft length above the step level) Shaft Diameter: 5mm Motor Diameter: 42mm Motor Length: 66.5mm Motor Tail Step Height: Approx 4.5mm Motor Tail Shaft Length: Approx 6.5mm Mounting Hole Pitch: Approx 29mm Mounting Screw: M4 Screw FAQ: Motor shakes or revolves not smoothly after power-on. This is due to insufficient power supply. It is recommended to replace the larger power adapter. Package List 1 x Motor