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This NEMA 17 stepper motor delivers 4.4kg-cm of torque at 1.68A current per phase, and its standout feature is a 0.9-degree step angle rather than the more common 1.8-degree step size found on many entry-level stepper motors. A finer step angle means each electrical pulse turns the shaft a smaller amount, which translates into smoother motion and finer positioning resolution for the same driver microstepping settings, a real advantage on 3D printers and CNC equipment where exact positioning matters.
Like other stepper motors of this type, it is a brushless DC design controlled in an open loop: the driver sends a pulse, and the motor rotates by a fixed angle in response, with no feedback signal required for basic positioning. Step accuracy is rated at 3 to 5 percent per step, and it offers good starting, stopping and reversing behaviour without needing complex control circuitry.
The shaft is machined to accept a pulley, gear or shaft coupler directly, and speed is controlled simply by adjusting the frequency of the input pulses sent from the driver, so faster pulse rates mean faster rotation up to the motor's practical limits. Like most stepper motors of this size, it is not well suited to running at extremely high speeds, where torque drops off and step accuracy can suffer, and mounting it slightly off-axis or with excess belt tension can introduce resonance during operation.
It pairs with any standard stepper driver rated for its voltage and current, such as an A4988 or similar chip, making it straightforward to integrate into an existing 3D printer or CNC controller setup.
Builders of 3D printers, small CNC routers, camera sliders and other precision-motion projects who want finer step resolution than a standard 1.8-degree motor will find the 0.9-degree step angle here worthwhile, provided their driver and firmware are configured for the different step count per revolution.
0.9 degrees per step.
4.4kg-cm at 1.68A per phase.
No, it runs in an open-loop configuration with standard step-and-direction control.
A single, machined shaft suited to pulleys, gears or couplers.
It is not well suited to extremely high speeds, where torque and accuracy fall off, as with most stepper motors this size.
| Brand | Generic |
|---|---|
| Frame (bundled) | NEMA 17 |
| Stall Torque | 4.4kg-cm |
| Selling unit | PCS |
