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    Nema 34 Closed Loop Stepper Motor, 2 Phase, 6.2A, 4.5N·m

    5 out of 5 based on 4 reviews | Write a review
    Factory price Nema 34 (86 x 86mm) closed loop stepper motor with encoder for sale, comes with holding torque of 4.5N·m, 12mm long 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 6.2 amps with a step accuracy of ±5%.
    SKU: ATO-STEP-34CM620
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    High precision Nema 34 closed loop stepper motor with high holding torque of 4.5 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 12mm shaft size and encoder performed well in various applications.

    Physical Specification

    • Model Number: ATO-FY86EM620BC1
    • Matched the Driver Model: ATO-FYDB808T
    • Flanged Size: 86 x 86mm (Nema 34)
    • Motor Length: 102mm
    • Shaft Diameter: 14mm
    • Number of Leads: 4 wire
    • Weight: 2.1kg

    Electrical Specification

    • Motor Type: Bipolar Closed Loop Stepper
    • Step Angle: 1.8°
    • Rated Current: 6.2A
    • Holding Torque: 450 N·cm (4.5 N·m, 637
    • Phase Resistance: 0.34Ω
    • Phase Inductance: 2.5mH
    • Rotor Inertia: 1800g·cm2

    Dimensions (Unit: mm)


    Dimensions of Nema 34 2 Phase Closed Loop Stepper Motor

    Motor & Encoder Wiring Diagram

    Wiring Diagram of 2 Phase Closed Loop Stepper Motor

    Speed-Torque Curve Diagram

    Speed Torque Curve Diagram of Nema 34 2 Phase Closed Loop Stepper Motor


    Nema 34 Closed  Loop Stepper Motor 4.5N·m-12N·m Details

    Tips: How to safely operate stepper motors

    Whether it is caused by improper operation to damage the stepper motor, or because of improper use, the safety of it is threatened, which will cause huge losses. The stepper motor should be operated safely in the application.

    Fully understand the motor: If you want to operate a permanent magnet stepper motor safely, read the instructions and specs carefully before using it, understand all aspects of the motor, clarify how the motor is used, how to switch it on and off.

    Operate in accordance with the regulations: maintain the safe operation of the high percision stepper motor, and use the motor in strict accordance with the regulations to ensure the correct operation of all aspects of it, and avoid undesirable consequences and safety problems caused by improper operation or wrong operation.

    Safe operation of stepper motors: always pay attention to the condition of the motor, find out and stop the inspection in time when there is an abnormality in the motor, to prevent potential safety hazards due to emergencies, or even accidents.


    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 Closed Loop Stepper Motor, 2 Phase, 6.2A, 4.5N·m
    What is the current required for these stepper motor pulses?
    What is usually used to provide the pulse signal for the stepper motor?
    I am unsure as to why the Arduino's PWM pins will not work for this application. An Arduino can supply 5V pulses.
    What is the current required for these pulses?
    From: katia | Date: 20/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The pulse signal can be sent by a PLC or a single-chip microcomputer.
    We have never used the pulse provided by the Arduino you mentioned, so we are not sure whether it can be used.
    A pulse is a signal, there is no current required.
    Excellent quality.
    I used these Nema 34 stepper motors to replace to motors only two of my 3D printers that I have been working to death. They work great now. They’ve been printing non-stop for a few weeks now and have no issues. Excellent quality.
    From: Mccurry | Date: 28/07/2022
    Was this review helpful? Yes No (0/0)
    Very happy with this Nema 34 closed loop stepper motor.
    This Nema 34 stepper motor combined with matched stepper driver, provides speed, consistency, high torque, and excellent precision. It works great for what I was using it for and never seemed to have a problem. Very happy with this product.
    From: Kostka | Date: 29/06/2022
    Was this review helpful? Yes No (0/0)
    Very satisfied with this stepper motor.
    Got this 6.2A Nema 34 stepper motor as a replacement for an old one on my DIY CNC. It has a good torque if provided with appropriate power. I am very satisfied with this closed loop stepping motor and I would buy another as needed.
    From: Danie | Date: 10/03/2022
    Was this review helpful? Yes No (0/0)
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