Zhaowei Machinery & Electronics Co., Ltd.

3V DC Planetary Gear Motor (4mm)

Load Current
Rated Speed
Rated Torque Max. (
Rated Torque Max. (mNm)
Reduction Ratio
Overall Length

Gearbox Specifications:

Bearing Porous bearing
Axial Endplay ≤0.3mm
Radial Loading on Output Shaft ≤0.3N
Operating Temperature -20℃ ~ +85℃


Gearbox Stages 1 2 3 4
Reduction Ratio 5 25 125 625
Max Rated Torque ( max) 70 70 70 70
Max Instant Torque ( max) 200 200 200 200
Gearbox Efficiency (%) 85 73 65 58
Length (mm) 6.18 7.67 9.17 10.72


4mm gearbox drawing

Motor Specifications:

Motors Stepper motor
Voltage 3V
Input Speed ≤10000rpm
Current 50mA max

Performance Data:

Model Speed at 2000pps Max Rated Torque Max Instant Torque Reduction Ratio Length Overall Length
  rpm   mm mm
ZWBMD004004-6 1000.0 140 400 6 6.18 11.78
ZWBMD004004-36 166.6 140 400 36 7.67 13.27
ZWBMD004004-216 27.7 140 400 216 9.17 14.77
ZWBMD004004-1296 4.6 140 400 1296 10.72 16.32

* The above specifications are subject to change without prior notice. They are for reference only and can be customized as required.

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Customer Service

ZHAOWEI’s micro drive systems apply in diverse areas all around the world to deliver the power, precision, and efficiency to motion solutions. Our sales and engineering support teams are ready to assist you with any questions, including quotation, application support, and product configuration. Please submit your requirements through our Custom Service Form to ensure a faster response.