This DC permanent magnet motor features small size, stable performance, high speed with little noise and CW/CCW rotation. Ball bearing, small friction, strong oil seal, high bearing capacity It's all-metal construction, so it's strong and durable. Provide two threaded screw outlet for easy connection. The motor shaft is made with 3mm diameter hole and 13mm threaded connecting tip. It can be widely usded in cotton candy machine, mini cutting bench, grinder, medical equipment and other mechanical equipment. Specification CH-3420 N.W.Weight: 0.49kg Model: CH-3420 Function types: adjustable speed Voltage:12V/24V Rated voltage:2-3.7A Rated power : 30W Speed: Speed: 3500RPM(12V), 7000RPM(24V) br> Torque:2kgf.cm Package size:13*8*9cm Shaft diamater:8mm Life:3000H Rotation:CW/CCW Bracket : N.W.Weight: 0.11kg Packing size:13*8*9cm Materials: High Strength Steel Vertical Plane: thickness 2.65mm/0.104inch, height 51mm/2.008in Baseboard: .45.5mmx57.5mm/1.791in x 2.264in