Description
Nema 17 stepper motor 42BYGHW811 4800g.cm holding torque, 2.4A. The most used stepper motor from the Wantai brand for 3d printers. A large and precise stepper motor that moves in steps of 1,8 degrees. So 200 steps per revolution.
Nema 17 stepper motor 42BYGHW811 specifications:
– Type: WT42BYGHW811
– Frame Size: NEMA17
– Step Angle: 1.8 degree
– Works from: 3.1 V
– Current: 2.5 A/phase
– Resistance: 1.25 Ohm/phase
– Inductance: 1.8 mH/phase
– Holding torque: 4800g-cm
– Rotor inertia: 68 g/cm2
– Number of wires: 4
- Weight: 0.34 kg
– Length: 48mm
– Shaft diameter: 5.0mm






Frank (verified owner) -
A very solid, powerful stepper motor, which can be easily controlled by the A4988 3D printer driver stepper motor module, but it needs good cooling (this A4988 is also available here with a cooling profile).
I had to measure the wiring, because the colors differ from several other stepper motors:
Green wire on 1A
Black wire on 1B
Red thread on 2A
Blue wire on 2B
The engine works best on a separate 12 Volt power supply=
so do not power via the 5 Volt= of Arduino.