• 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

High Torque 20mm Stepper Motor With Worm Reduction Gearbox Miniature Gear Motor

Place of Origin China
Brand Name VIC-TECH
Certification RoHS
Model Number SM20-1812
Minimum Order Quantity 1 Unit
Price $3.2-$8/unit
Packaging Details Selling Units: Single item plastic box inner , outer paper box Package: single carton packing, 100 - 1000 pieces per box. Lead Time : 30 Days After Deposit
Delivery Time 15-30 work days
Payment Terms MoneyGram, T/T, Western Union, T/T
Supply Ability 1000000units/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
Step Angle 18 ° Voltage 12 V DC
Resistance 20 Ω ± 10% Gearratio 21:1~1030:1
Type Permanent Magnet Torque 2.5kg.cm (800pps)
High Light

20mm miniature gear motor


miniature high torque stepper motor


20mm high torque stepper motor

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Product Description

20mm deceleration stepper motor 12V DC micro stepper motor with worm gear box

20mm stepper motor with worm reduction gearbox 2 phase micro stepper motor high torque

This is a 20mm stepper motor with a worm gearbox.

The output shaft is a D shaft with a diameter of 3mm.

You can freely change the length and design of the output shaft.

We have different types of gear ratios for you to choose, 21:1 42:1 118:1 236:1 302:1 399:1 515:1 603:1 798:1 1030:1.

The higher the gear ratio, the higher the torque and the slower the motor turns.

If you want to buy small samples for testing, please feel free to contact us.

We have no MOQ, you can order any quantity you want.

Mechanical Dimension:MM

High Torque 20mm Stepper Motor With Worm Reduction Gearbox  Miniature Gear Motor 0




Motor type 20mm stepper motor with worm reduction gearbox
Model No. SM20 -1812
Motor diameter 20 mm
Step angle 18 degrees
Coil resistance 31 or 10Ω/phase
Output shaft

2mm or 3mm diameter D shaft


Gearbox type 18mm*12mm worm gearbox
Gear ratio

21:1  42:1  118:1  236:1  302:1  515:1  603:1  798:1  1030:1


Typical Applications:

  • Medical instruments

  • Precision instrument

  • Robot

  • Factory automation

  • Game machine

  • ATM equipment

  • Security equipment


Competitive Advantage:

  • High quality and the best price.
  • Fast deliver,storage company and rich inventory
  • Near Shanghai port, the traffic is very convenient.


Type of Fixture Cover:


The regular models are shown in the figure, and the special sizes can be customized.

High Torque 20mm Stepper Motor With Worm Reduction Gearbox  Miniature Gear Motor 1

Type of Wire Connect:

Motor input method with Pin type, FPC, PCB, Lead wire etc.

These can be customized according to customer needs.

High Torque 20mm Stepper Motor With Worm Reduction Gearbox  Miniature Gear Motor 2

Product :



High Torque 20mm Stepper Motor With Worm Reduction Gearbox  Miniature Gear Motor 3

Packaging diagram:



High Torque 20mm Stepper Motor With Worm Reduction Gearbox  Miniature Gear Motor 4


Changzhou Vic-Tech Motor Technology Co.,Ltd( follows,we only call company) was founded in year 2011, the company mainly develops, manufactures and sells micro stepper motors, micro gearboxes, micro slider motor, micro linear motor and other products


The company is located in the Yangtze River Delta Economic Belt, one of the most economically developed regions in China, and is located in Changzhou City, Jiangsu Province, with a beautiful environment. The company is 20 kilometers away from Changzhou Airport, 5 kilometers away from the high-speed railway station, and 1 kilometer away from the high-speed intersection. Shanghai and Nanjing are about 120 kilometers away. The transportation is very convenient, and the domestic and foreign logistics and transportation are very developed and convenient!


The main technical personnel of the company have worked in related industries for more than 10 years, and have work experience in foreign companies such as Japan, South Korea, Europe and the United States, and have work experience in domestic listed companies. Have systematic product development ability, perfect project management ability and good customer communication ability. The company has developed more than 30 customized projects for first-class enterprises at home and abroad, and cooperated with more than 20 large companies.

If you are interested in our products, please feel free to email me.



1. Are you a manufacturer or a trader?

We are a manufacturer. We produce motors ourselves.


2. Where is your factory? Can we visit your factory?

Our factory is located in Changzhou city. Feel free to visit us if you want.


3. Do you provide customized samples/ free samples?

We are able to do customization on samples, and it cost extra customization cost.

No, we don’t send free samples.


4. What’s the lead time on samples?

For samples in stock, lead time is within 3 days.

For samples not in stock, lead time is about 15 days.

For customized samples, lead time is about 25 to 30 days.


5. What customization service do you provide?

We have a developing team for over 20 years experience.

We provide customization service on all sorts of motor’s components.

From motor’s slider, lead screw, gearboxes design.

To cable length, connector type, and FPC design.