• Changzhou Vic-Tech Motor Technology Co., Ltd.
    Andres Blanco
    The thruster have arrived correctly. I tested them on the ROV and we are very happy with the result. The epoxy interior finish is very good and the power of the motors in relation to the size is quite good.
  • Changzhou Vic-Tech Motor Technology Co., Ltd.
    Gregoire Lange
    The cooperation between Changzhou Vic-Tech Motor Tech and our company was just great. Good understanding of our needs, great willing to solve our problems. I recommend !
  • Changzhou Vic-Tech Motor Technology Co., Ltd.
    David Molevelt
    Professional and clear communication. Order was shipped in time. Counter connectors where added to the shipment. Driver works like we agreed !
  • Changzhou Vic-Tech Motor Technology Co., Ltd.
    Buildstorm Private Limited
    The product works as expected, it was packed nicely. Seller responds very quickly and helps in making a buying decision. They are ready to customize the product for you.
  • Changzhou Vic-Tech Motor Technology Co., Ltd.
    Ashley Griffin
    Shipment was received very quickly. Product was well protected by packaging. Company rep was cordial and kind. A Plus rating!
Contact Person : Kangtai Lee
Phone Number : +86 17715451401
Whatsapp : +8617715451401

4 Wire Dual Output Shaft Motor 20mm Geared DC Motor With Cylinder Gearbox

Place of Origin China
Brand Name VIC-TECH
Certification RoHS
Model Number SM20-13GR
Minimum Order Quantity 1Unit
Price $3~$8.5/Unit
Packaging Details The product is packed with pearl cotton, and the outside is in a carton.
Delivery Time 10~30 days after receiving sample payment
Payment Terms MoneyGram, Western Union,Credit Card,T/T, L/C
Supply Ability 100000\ Units/year

Contact me for free samples and coupons.

Whatsapp:0086 18588475571

Wechat: 0086 18588475571

Skype: sales10@aixton.com

If you have any concern, we provide 24-hour online help.

Product Details
Motor Type PM Stepper Motor+ Gearbox Motor Size 20 Mm Diameter
Step Angle 18°/gear Ratio Coil Resistance 10Ω/phase
Driving Voltage 5~9V DC Phase No. 2 Phases (Bipolar)
Gear Ratio 1:3-1:350 Lead Wire 4 Wire
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Dual Output Shaft Motor 20mm


4 Wire Geared DC Motor


Cylinder Gearbox DC Motor

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Product Description

4 Wire Dual Output Shaft Motor 20mm High Torque Geared DC Motor With Cylinder Gearbox

High torque SM20-13GR cylinder gearbox D output shaft PM stepper motor

This 20mm PM stepper motor comes with a cylinder gearbox.
Gearboxes are available in different gear ratios from 10:1 to 350:1
The larger the transmission ratio, the slower the output shaft speed and the greater the torque.

It can be evaluated according to the torque required by the customer, and the transmission ratio can be determined according to the customer's needs.
The output shaft is a 3mm diameter D2.5 mm D shaft.
The length of the output shaft is adjustable.

If you are interested in our products. Buy a small sample for testing, please feel free to contact us.

Motor Parameters:

Product name 20mm PM motor geared stepper motor
Model SM20-13GR
Motor type 20mm PM motor(Bipolar)
Resistence 10±7%ohm (optional 20 15 10 ohm)
Phase No. 2 phases(4 wires)
Gear ratio 1:10~1:350
Output Torque 300g.cm
Step angle 18°/gear ratio
Output shaft 3mm D2.5 shaft



Gearbox Parameters:

Gear ratio 10:1 16:1 20:1 30:1 35:1 39:1 50:1 66:1
Precise ratio 9.952 15.955 20.622 29.806 35.337 38.889 49.778 66.311
Tooth number 14 20 18 14 18 18 15 18
Gear levels 2 4 4 3 4 4 4 4
Efficiency 80% 64% 64% 71% 64% 64% 64% 64%
Gear ratio 87:1 102:1 153:1 169:1 210:1 243:1 297:1 350:1
Precise ratio 87.303 101.821 153.125 169.383 209.402 243.158 297.071 347.972
Tooth number 15 14 16 15 19 15 15 14
Gear levels 4 4 5 5 5 5 5 5
Efficiency 64% 64% 58% 58% 58% 58% 58% 58%

Design drawing:
4 Wire Dual Output Shaft Motor 20mm Geared DC Motor With Cylinder Gearbox 0

Product display:

4 Wire Dual Output Shaft Motor 20mm Geared DC Motor With Cylinder Gearbox 1

4 Wire Dual Output Shaft Motor 20mm Geared DC Motor With Cylinder Gearbox 2

Application of stepper motors:

Stepper motors are used for precise control, widely used on medical equipment, 3D printer, industrial precise control, automation equipment, etc.
Stepper motors can be used in any mechanisms requirement precise conrtol and rotational/linear movement.

Advantage of stepper motors:

Stepper motor can reach precise control even without close-loop encoders / without feed back system, also they do not have electrical brushed. Thus there is no electromagnetic interference and electrical sparks issues. In some cases, they can replace DC brushed motors/ brushless motors.
Stepper motors are easy to control with drivers, and this feature establish its important position in the field of precise control.
1. Precise control achievable, programmable
2. Without electromagnetic interference & electrical sparks
3. Small size
4. Reasonable price
5. Low noise
6. Long service life