2-phase 4-wire Permanent magnet 25mm step motor applied to office equipment

Short Description:

Model No.:PM25S-024-278 

Motor type: Permanent magnet stepper motor
Step angle: 15°±7%
Motor size: 25mm
Motor voltage:5V DC
No. of phases: 2 phases
Current Per phase: 0.625A
Resistance: 8Ω±10%


Product Detail

Product Tags


This motor is a 25mm diameter motor with a thickness of 16mm. The diameter of the motor's output shaft is 2mm. The length can be customized according to the customer's needs. The motor's output shaft can be customized to install the screw rod and gear, D-axis, double flat shaft, etc., which can be customized according to the customer's installation needs
For the installation of motor, the mounting plate with ears can also be produced
Our team has more than 10 years experience in the design, development and production of stepper motor, so we can develop and design products according to the special needs of customers!



Voltage 5V DC
No.of Phase Phase
Step Angle 15°±7%
Winding Resistance25℃) 8Ω±10%
Current phase 0.625A
Detent torque 110g.cm
Max Pull-in Rate 300PPS
Holding Torque 120g.cm
Pull-out Torque 200pps/30g.cm
Winding temperature 65K
Didlectric Strength 600 VAC 1SEC 1mA


Design drawing: Output shaft customizable


Same type of motor


About the basic structure of PM stepper motor


Features & Advantage

1. High precision positioning
Since steppers move in precise repeatable steps, they excel in applications requiring precise
positioning, by the number of steps the motor moves
2. High Precision speed control
Precise increments of movement also allow for excellent control of rotational speed for process
automation and robotics. The rotational speed is determined by the frequency of the pulses.
3. Pause and holding function
With control of the drive, the motor has lock function (there is current through motor windings, but
the motor does not rotate), and there is still a holding torque output.
4. Long life & low electromagnetic interference
The stepper motor has no brushes, and does not need to be commutated by brushes like a brushed
DC motor. There is no friction of the brushes, which increases the service life, has no electric sparks, and reduces electromagnetic interference.

Application of PM stepper motor

Textile machinery
Industrial control
Air conditioning

Working principle of stepper motor

The drive of the stepper motor is controlled by software. When the motor needs to rotate, drive will
apply the stepper motor pulses. These pulses energize stepper motor's in a specified order, thereby
causing the motor's rotor to rotate in a specified direction (clockwise or counter clockwise). So as to
realize proper rotation of the motor. Each time the motor receives a pulse from the driver, it will rotate by a step angle (with full-step drive), and the rotation angle of the motor is determined by the number of driven pulses and step angle.

Lead Time

If we have samples in stock, we can ship out samples in 3 days.
If we do not have samples in stock, we need to produce them, production time is about 20 calendar days.
For mass production, lead time depends on order quantity.


Samples are packed in foam sponge with a paper box, shipped by express

Mass production, motors are packed in corrugated cartons with transparent film outside. (shipping by air)

If shipped by sea, product will be packed on pallets


Payment method and payment terms

For samples, in general we accept Paypal or alibaba.
For mass production, we accept T/T payment.

For samples, we collect full payment before production.
For mass production, we can accept 50% pre-payment before production, and collect the rest 50% payment before shipment.
After we cooperate order more than 6 times, we could negotiate other payment terms such as A/S (after sight)

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