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    Nema 34 Stepper Motor, 2 Phase, 4A, 8.5N·m

    5 out of 5 based on 5 reviews | Write a review
    Nema 34 (86 x 86mm) hybrid bipolar stepper motor for sale, comes with holding torque of 850N·cm (8.5N·m), 14mm or 12.7mm shaft, 1.8 degree step angle, 4 wire connections, suitable for CNC machine, 3D printer and robot arm, etc. This hybrid stepper motor draws high current of up to 4 amps with a step accuracy of ±5%.
    SKU: ATO-STEP-34L400
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    High precision Nema 34 closed loop stepper motor with high holding torque of 8.5 N·m is suitable for the biggest projects, such as CNC application, robotic, 3D technology and so on. The bipolar stepper motor is 1.8 degrees per step with 14mm or 12.7mm shaft size and encoder performed well in various applications.

    Physical Specification

    • Model Number: ATO-FY86EL400A
    • Matched the Driver Model: ATO-FYDM808T
    • Flanged Size: 86 x 86mm (Nema 34)
    • Motor Length: 118mm
    • Shaft Diameter: 14mm/ 12.7mm
    • Number of Leads: 4 wire
    • Weight: 3.8kg

    Electrical Specification

    • Motor Type: Bipolar Stepper
    • Step Angle: 1.8°
    • Rated Current: 4A
    • Holding Torque: 8.5 N·m (850 N·cm, 1204
    • Phase Resistance: 0.97Ω
    • Phase Inductance: 5.5mH
    • Rotor Inertia: 4100g·cm2

    Dimensions (Unit: mm)


    Dimension of Nema 34 2 Phase Stepper Motor

    Wiring Diagram

    Wiring Diagram of Nema 34 2 Phase Stepper Motor

    Speed-Torque Curve Diagram

    Speed Torque Curve Diagram of Nema 34 2 Phase Hybrid Stepper Motor


    Nema 34 Stepper Motor 4.5N·m 12N·m Details

    Tips: Application of stepper motor in automobile test

    The detection of many automobile brake components requires a stepper motor in the test system.

    Since the angular displacement of the stepper motor is strictly proportional to the input pulse, there is no accumulated error during its movement and the follow ability is good. Therefore, the stepper motor is a better performing component in the automotive brake component test system. The system hardware consists of displacement sensor, force sensor, motor, and the control core adopts industrial computer and data acquisition card.

    The hybrid stepper motor drives the ball screw through the coupling to form a force adding device. The force sensor is installed at the front end of the screw rod to measure the output torque of the motor and the "input force of the test piece". The industrial computer controls the start, advance, and back, stop, and control the speed of forward and backward according to the test program.


    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 34 Stepper Motor, 2 Phase, 4A, 8.5N·m
    Good strong stepper motors.
    I used these Nema 34 stepper motors to replace my old motors. They work great now! Very quiet! They are good strong stepper motors and I will buy more.
    From: Fredrik | Date: 28/07/2022
    Was this review helpful? Yes No (0/0)
    If it is possible to order the stepper motor with an encoder.
    I would like to know if it is possible to order the FY86EL400A stepper motor with an encoder. We are limited to 24 VDC. Additionally, I would like to know how high the VCC will be for the encoder (5V or 24V?).
    From: Annette | Date: 27/07/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Our FY86EL400A stepper motor can be added with encoder. But only 5VDC encoders are available, no 24VDC ones.
    Nice and powerful.
    This Nema 34 stepper motor is strong and powerful. I have ran these for about 200 hours now on my CNC machine, it has never skipped a beat. Very pleased with the results. Great stepping motor for the price.
    From: Kostka | Date: 29/06/2022
    Was this review helpful? Yes No (0/0)
    Easy to hook up.
    This Nema 34 stepper motor is great with affordable price. Feels and looks high quality. It is easy to hook up and works great for my CNC machine. All in all, definitely worth the money.
    From: Jasper | Date: 30/05/2022
    Was this review helpful? Yes No (0/0)
    Bought this Nema 34 stepper motor for my new CNC build. It works great without issue. I was surprised to see such an excellent stepper motor for so cheap, so I decided to buy one more and I will recommend this motor to my friends.
    From: Jawdat | Date: 25/03/2022
    Was this review helpful? Yes No (0/0)
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