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Nema 17 Two Phase 2A 42mm Gear Stepper Motor

Categories Gear Stepper Motor
Brand Name: Prostepper
Model Number: PST42H261-4L20G
Certification: CE.ISO.ROHS.SGS
Place of Origin: JIANGSU,CHINA
MOQ: 1pcs
Price: Negotiable
Payment Terms: T/T, Western Union, L/C
Supply Ability: 250000pcs per/ month
Delivery Time: 7-25 work days
Packaging Details: 38.5*24*23
Storage Temperature Range: -20°C~ +50°C
Current: 2A
Color: Black&Sliver
Weight: 0.5kg
Step Angle: 1.8degree
Motor Lenght: 61mm
Type: Gear Box stepper motor
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Nema 17 Two Phase 2A 42mm Gear Stepper Motor

1.8 Degree Gear Box Type Stepping Motor Nema17 Hybrid Stepper Motor 42mm



Description of Gear Box Stepper Motor

1. Accurate position Control

The angular displacement of the stepping motor can be precise controlled by the number of electrical pulses.Angle accuracy can be controlled within ±0.09°without any feedback devices.

2. Longer Life

Stepping motor is a mechanical structure,which does not need be changed by electric brush or Hall sensor,thus reducing the probability and increasing the motor life.Stepping motor life usually determined by the life of the bearing.

3. Strictly control the production of parts to improve the quality of parts.

4. The material is selected from well-known manufacturers at home and abroad. The advantages are light weight, good heat dissipation performance, good thermal conductivity, die-casting, good plasticity, higher elongation than iron, low noise, good motion stability, the disadvantages are high price, low hardness


Number of phase2
Basic step Angle1.8 degree
Rated Current2.0A
Resistance0.8ohm
Inductance3.7mH
Holding Torque0.72N.m
Weight0.5kg




Gear Box Stepper Motor's specifications

  1. Stepping Accuracy: ± 5%
  2. Resistance Accuracy: ± 10%
  3. Inductance Accuracy: ± 20%
  4. Temperature Rise: 80°C Max.
  5. Ambient Temperature: -20°C ... +50°C
  6. Insulation Resistance: 100MOhm min. 500V DC
  7. Withstand: 500V AC, 1 Minute

Gear Box Stepper Motor Control by Varying Clock Pulses


Stepper motor control circuit is a simple and low-cost circuit, mainly used in low power applications. The circuit is shown in the figure,


A stepper motor is an electromechanical device it converts electrical power into mechanical power. Also, it is a brushless, synchronous electric motor that can divide a full rotation into an expansive number of steps. The motor’s position can be controlled accurately without any feedback mechanism, as long as the motor is carefully sized to the application. Stepper motors are similar to switched reluctance motors.


The stepper motor uses the theory of operation for magnets to make the motor shaft turn a precise distance when a pulse of electricity is provided. The stator has eight poles, and the rotor has six poles. The rotor will require 24 pulses of electricity to move the 24 steps to make one complete revolution. Another way to say this is that the rotor will move precisely 15° for each pulse of electricity that the motor receives.


Gear Box Stepper Motor features

  • Smooth surface
  • Long lasting life
  • Low cost for control achieved
  • High torque at startup and low speeds
  • Ruggedness
  • Simplicity of construction
  • Can operate in an open loop control system
  • Low maintenance
  • Less likely to stall or slip
  • Will work in any environment
  • Can be used in robotics in a wide scale.
  • High reliability
  • The rotation angle of the motor is proportional to the input pulse.
  • The motor has full torque at standstill (if the windings are energized)
  • Precise positioning and repeatability of movement since good stepper motors have an accuracy of 3 – 5% of a step and this error is non-cumulative from one step to the next.
  • Excellent response to starting/stopping/reversing.
  • Very reliable since there are no contact brushes in the motor. Therefore, the life of the motor is simply dependent on the life of the bearing.
  • The motors response to digital input pulses provides open-loop control, making the motor simpler and less costly to control.
  • It is possible to achieve very low-speed synchronous rotation with a load that is directly coupled to the shaft.
  • A wide range of rotational speeds can be realized as the speed is proportional to the frequency of the input pulses.
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