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    Nema 23 Stepper Motor, 2 Phase, 2.5A, 0.4N·m

    5 out of 5 based on 3 reviews | Write a review
    Factory price Nema 23 hybrid stepper motor used in 3D printer, CNC router and robot arm, with 1.8 degree step angle, holding torque at 0.4N·m, 2.5 amp, 2 phase 4 lead wires, optional shaft size of 8mm or 6.35mm, motor length 41mm, no lost step and low noise.
    SKU: ATO-STEP-23S250
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Nema 23 high torque bipolar stepper motor used in CNC machine, drawing equipment and sewing machine, robot arm and so on. It is a four-wire connection motor with encoder, holding torque at 0.4N·m, step angle accuracy ±5%, no lost step and high precision. ATO  permanent magnet stepper motor can be controlled by a voltage of DC 24V ~ 50V or AC 20V ~ 40V digital stepper controller for precise position control.

    Physical Specification

    • Model Number: ATO-FY56ES250A
    • Matched the Driver Model: ATO-FYDM504T
    • Flanged Size: 57 x 57mm (Nema 23)
    • Motor Length: 41mm
    • Shaft Diameter: 8mm/ 6.35mm
    • Number of Leads: 4 wire
    • Weight: 0.47kg

    Electrical Specification

    • Motor Type: Bipolar Stepper
    • Step Angle: 1.8°
    • Rated Current: 4.2A
    • Holding Torque: 40 N·cm (0.4 N·m, 57
    • Phase Resistance: 1.4Ω
    • Phase Inductance: 1.4mH
    • Rotor Inertia: 150g·cm2

    Dimensions (Unit: mm)


    Dimensions of Nema 23 2 Phase Hybrid Stepper Motor

    Wiring Diagram

    Wiring Diagram of Nema 23 2 Phase Stepper Motor

    Speed-Torque Curve Diagram

    Speed Torque Curve Diagram of Nema 23 2 Phase Hybrid Stepper Motor


    Nema 23 Stepper Motor 2 Phase 0.43N·m-3N·m Details

    Tips: Factors that determine the step angle of a stepper motor

    When the stepper motor switches the excitation current of the stator winding once, the rotor rotates by a fixed angle, that is, the step angle. The step angle is generally obtained from the rotating torque generated by the switched phase current, so the number of poles per phase is required to be an even number. Motors are usually more than two-phase, of course, there are some special single-phase motors with only one coil.

    Although it is single-phase, the direction of the magnetic flux generated by a coil reverses alternately to drive the rotor to rotate. The phases of practical motors are single-phase, two-phase, three-phase, four-phase, and five-phase. Most of the stepping motors currently use permanent magnet rotors. The reason why permanent magnets are commonly used is their high efficiency and high resolution.

    The factor that determines the step angle is the resolution of the motor. The higher the resolution of the stepping motor (the number of steps per revolution, 360° divided by the step angle), the higher the position accuracy. In order to obtain high resolution, the number of poles should be large. For PM type rotors, N and S poles are alternately placed on the outer surface of the rotor core at equal pitches. The number of rotor poles is the sum of the number of N poles and S poles. To simplify the explanation, assume that the number of pole pairs is 1. Here it is determined that the step angle θs of the motor whose rotor is a permanent magnet is represented by the following formula, where Nr is the number of rotor pole pairs and P is the number of stator phases.


    360 Days warranty

    Thank you for buying industrial automation products on, all products sold by ATO and the partner cover a 360-days-warranty, effective from the date of receiving the products.

    What is covered?

    ATO is responsible for providing free spare parts, free technical support to assist the customer to repair the defective products until the problem is solved.

    What is not covered?

    • Product purchased from anyone other than ATO store or a ATO authorized reseller.
    • Expendable parts.
    • Routine cleaning or normal cosmetic and mechanical wear.
    • Damage from misuse, abuse or neglect.
    • Damage from use of parts other than ATO approved.
    • Damage from use outside the product’s usage or storage parameters.
    • Damage from use of parts not sold by ATO.
    • Damage from modification or incorporation into other products.
    • Damage from repair or replacement of warranted parts by a service provider other than a ATO authorized service provider.
    • Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
    Existing reviews of Nema 23 Stepper Motor, 2 Phase, 2.5A, 0.4N·m
    Quality Nema 23 stepper motor, great precision.
    These are great Nema 23 stepper motors and they are very strong. I purchased 8 of these and I use them for my projects. I like them, and if the power they offer is enough for your application, these are definitely recommended for whatever you are going to do with them.
    From: Gonzalez | Date: 27/07/2022
    Was this review helpful? Yes No (0/0)
    Very happy with the stepper motor.
    I used this 2 phase stepper motor to replace my old one on 3D printer. It has been printing non-stop for a few weeks now and haven’t failed me. Very happy with this stepping motor. Powerful enough for the job of any of the printer functions.
    From: Joaquin | Date: 29/06/2022
    Was this review helpful? Yes No (0/0)
    Can I user your stepper motor with my driver?
    Can I user your stepper motor with my driver?
    From: Feenoh | Date: 07/01/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, you can.
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