Nema 23 Stepper Motor Datasheet | Full Spec Breakdown

A NEMA 23 datasheet describes a bipolar hybrid stepper motor with a 57×57 mm frame, 1.8° step angle, and torque ranging from 0.9 to 3.0 Nm.

A NEMA 23 stepper motor datasheet isn’t one document from a single company — it’s a standard specification set shared by any motor with a 57×57 mm mounting faceplate. That frame size is the only thing every NEMA 23 shares. Torque, current, body length, and wiring configuration shift between manufacturers and model variants, which is why reading the datasheet matters more than the name on the box. Whether you’re building a CNC router, a 3D printer, or a linear actuator, the datasheet tells you everything you need to match the motor to your driver and power supply.

What Does A NEMA 23 Stepper Motor Datasheet Cover?

A NEMA 23 datasheet defines the physical and electrical parameters that let you size a motor correctly. The standard frame size is 57×57 mm (2.3×2.3 inches), and the shaft diameter is 6.35 mm (1/4 inch). The step angle is 1.8° by default — that’s 200 full steps per revolution — though some precision variants use 0.9° for 400 steps per revolution.

Electrical specs on any NEMA 23 datasheet include rated current per phase, phase resistance, inductance, and voltage rating. These numbers determine which stepper driver and power supply voltage you need. A mismatch between the datasheet and your driver settings is the most common reason these motors overheat or lose torque.

NEMA 23 Stepper Motor Specifications

Actual values shift by manufacturer and body length, so always check the specific datasheet for your model.

Which Manufacturers Make NEMA 23 Stepper Motors?

Several major manufacturers produce NEMA 23 motors, each offering different body lengths, torque ratings, and wiring options. StepperOnline (OMC) carries the standard 57×57×76 mm model rated at 2.8 A per phase with 126 Ncm holding torque, plus integrated versions that bundle the driver onto the motor. MOONS Industries offers the B020106 series with similar specs. ATO and Avid CNC sell high-torque variants that push 380 oz-in at 3.5 A per phase. Circuit Specialists produces a 6-wire 57BYGH302 model with 13.0 kg-cm torque for applications that need a center-tap wiring option. The datasheet from StepperOnline’s NEMA 23 product page is a solid reference point for comparing standard specs across variants.

Wiring A NEMA 23 Stepper Motor

Getting the wiring right matters. A swapped coil pair or a reversed polarity will make the motor vibrate instead of turn.

1. Identify the two coils. On a standard 4-wire motor, the Black and Green wires form Coil A. The Red and Blue wires form Coil B.
2. Connect Coil A to the driver’s A+ and A- terminals. Connect Coil B to B+ and B-. Polarity within each coil matters for direction — swap a pair to reverse rotation.
3. For 6-wire or 8-wire motors, consult the specific datasheet. These allow series or parallel configurations that change the effective current and inductance.

When the wiring is correct and the driver is enabled, the motor should hold position with a smooth hum. If it chatters or refuses to move, power down and check each connection against the datasheet.

Current And Microstepping Settings

The driver’s current setting must match the rated current on the datasheet — usually 2.8 A per phase for a standard 76 mm NEMA 23. Set the driver DIP switches or potentiometer to this value, or slightly lower initially. If the motor casing becomes too hot to touch after 15 minutes of operation, reduce the current by 0.1–0.2 A.

Microstepping improves smoothness at low speeds. Use 1/8 or 1/16 step via the driver DIP switches for most CNC and printer applications. Full-step or half-step delivers maximum torque but produces more vibration and audible noise. The trade-off is worth knowing when you set up the driver.

NEMA 23 Stepper Motor Comparison

Not all NEMA 23 motors are interchangeable. The table below compares common models across key specs so you can pick the right one for your build.

Common Mistakes That Damage NEMA 23 Motors

A few setup errors account for most NEMA 23 failures. Overcurrenting is the fastest way to kill a motor — setting the driver above 3.0 A on a 2.8 A motor causes rapid overheating and bearing failure. Voltage mismatch is another big one: a DC supply under 12 V limits top speed, while anything over 40 V can destroy the driver. Swapping coil pairs during wiring prevents rotation entirely; the motor will just vibrate in place. And ignoring body length leads to torque surprises — a 100 mm body delivers significantly more torque than a 76 mm body, even though both are NEMA 23.

Stick to the datasheet values, keep the supply voltage inside the driver’s range, and verify your wiring with a multimeter before applying power. Those three habits prevent nearly every common failure.

Choosing The Right NEMA 23 Stepper Motor For Your Project

Start with the mechanical load. A CNC router cutting aluminum needs more torque than a 3D printer moving a lightweight print head. For heavier cuts, look at the longer-body high-torque variants in the 380 oz-in range at 3.5 A. Match the motor’s rated current to a driver that can deliver it, and verify that the driver’s input voltage range includes your power supply’s output. Readers who are ready to purchase can browse our tested roundup of the best NEMA 23 motors for side-by-side comparisons of current models.

The datasheet is your build’s instruction manual — frame size tells you the bolt pattern, current tells you the driver setting, and torque tells you what the motor can actually move. Check all three before you buy, and your setup will run reliably from the first power-up.