China Standard SL21 1000W MID Drive BLDC Motor with Gears for Dirt Bike, ATV and Golf Cart vacuum pump booster

Product Description


Efficient,Reliable BLDC Motor

SL 72V 3000W MID Drive DC Motor with Four Speed Gear Box for Electric Dirt Bike, ATV and Golf Cart

Company Profile

We are leading manufacturer of general-purpose brushless dc (BLDC) motors with power range from 1000W to 5000W, and the voltage range from 48Vto 96V DC. It has been widely used for many applications, e.g. auto industry, battery powered Dirt bikes, scooters, electric cars, forklifts, golf buggies, boats, etc. It has better performances than other traditional dc motors.


Product Parameters


Model SL21
Rated Power/W 1000W
Rated Voltage/V 48V/60V
Idle current/A  3.1-5.6
Rpm 3000-6000
Rated torque/NM 3.3-1.7
Motor Efficiency 90/%
Primary Speed Ratio  3.27:1,1.94:1,1.35:1,1.04:1 
Poles 5 poles
Motor Phase Angle:  120 degree
Gear Postion:  step on 4 gear,check back gear,international gear
Clutch method:  Manul/Auto

Detailed Photos

Motor Schematic Diagram

Motor Installation example


Packaging & Shipping


1) What certificates are available for your adult electric dirt bike? Does your factory offer EEC and COC Paper file?
A: For the certificate, we have ISO 9001, CE, EEC, COC Paper.

2) What is your MOQ? Can I just order 1 or 2 sample bikes and how long will it take?
A: Sure. we do offer sample bikes (2 or 4 units) for wholesalers and motorsports dealer. Usually, it takes About 5-7 working days to arrange the sample bikes. And about 30-45 days arrive your front door. It depends on your country and location

3) Do you accept OEM Dirt Bikes for my company? Can I have my own customized logo decals on the e-bikes?
A: Sure, OEM service can be accepted. Your customized requirements for logo, color, design, package, your language manual etc. This needs MOQ, feel free to ask us for more details.

4) What’s the MOQ for customized bikes decals or stickers?
A: Our MOQ is 50 sets, contact our OEM service person for more details.

5) How long is the dirt bike order production leading time?
A: The production date of sample order is within 5-7 working days, and the production date of bulk order needs to ask our sales staff.

6) What’s the delivery time?
A: It takes about 30-45 days for shipment to the EU.
It takes about 25-35 days for shipment to the USA.
It takes about 25-30 days for shipment to the AU.

7) What kind terms of payment can be accepted?
A: Bank Transfer, WISE, Western Union, Paypal,RMB account and so on.(Contact with customer our service.) After payment, please tell us your details address, zip code and phone NO. We will deliver bikes for you ASAP.

8) How does your bike factory carry out quality control?
A: We attach great importance to quality control. Every part of our products has its own QC department. Each item will go through 3 quality inspections before departure, and it will be allowed to send out only after it has obtained a certificate of conformity.

9): What is the bike warranty?
A: Our warranty time is 12 months from date of machine arriving at your destination port.
10) Why is the price offered by your salesperson different from what you advertised?
A:We sincerely tell you that our price is generally the FOB price, and the price is the unit price of the minimum configuration of the product. So sometimes your needs may be different configurations and different quantities, so we need to give the final best price according to your requirements. Thank you for your understanding, because it is only when the advertised price is lower that we have a very valuable opportunity to get in touch with you.

11) How do you make our business long-term and good relationship?
A:1. We keep good quality, good aftersales service and competitive price to ensure our customers’ benefits;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.

12) Where is your company located? How can I visit there?
A: Our factory is located in ZheJiang Province, near HangZhou international airport for about 1.5 hours driving. Welcome to visit us!

Why Cooperate with Us?

1) We are a regular professional factory that can provide all type of electric dirt bikes, bike spare parts and all technical services. We can directly establish stable cooperative relationships with customers, grow and develop together to expand markets, develop steadily, and have long-term cooperation.

2) It has various import and export qualifications certified by international authoritative organizations and officially registered by the government. It can provide stable and high quality dirt motorcycles and can continue to provide customers with high-performance and high-quality electric off-road motorcycles and ebikes

3) You can directly establish contact with factory service personnel, without middleman. Customers can participate in our ebikes improvement team, and solve problems encountered quickly and efficiently.

4) All motorcycle or bike parts are complete and sufficient, and we can continue to provide customers with complete vehicle and subsequent replacement parts services and technical consultation.

5) Technical consultation is permanently free

6) We can accept OEM OED customization services according to customer requirements.


/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Application: Universal, Industrial, Household Appliances, Car, Adult Dirt Ebike, Golf Cart,ATV
Operating Speed: High Speed
Excitation Mode: Permanent Magnet
US$ 490/Piece
1 Piece(Min.Order)


Order Sample



.shipping-cost-tm .tm-status-off{background: none;padding:0;color: #1470cc}

Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

gear motor

Where can individuals find reliable resources for learning more about gear motors and their applications?

Individuals seeking to learn more about gear motors and their applications have access to various reliable resources that provide valuable information and insights. Here are some sources where individuals can find reliable information about gear motors:

1. Manufacturer Websites:

Manufacturer websites are a primary source of information about gear motors. Gear motor manufacturers often provide detailed product specifications, application guides, technical documentation, and educational materials on their websites. These resources offer insights into different gear motor types, features, performance characteristics, and application considerations. Manufacturer websites are a reliable and convenient starting point for learning about gear motors.

2. Industry Associations and Organizations:

Industry associations and organizations related to mechanical engineering, automation, and motion control often have resources and publications dedicated to gear motors. These organizations provide technical articles, whitepapers, industry standards, and guidelines related to gear motor design, selection, and application. Examples of such associations include the American Gear Manufacturers Association (AGMA), International Electrotechnical Commission (IEC), and Institute of Electrical and Electronics Engineers (IEEE).

3. Technical Publications and Journals:

Technical publications and journals focused on engineering, robotics, and motion control are valuable sources of in-depth knowledge about gear motors. Publications like IEEE Transactions on Industrial Electronics, Mechanical Engineering magazine, or Motion System Design magazine often feature articles, case studies, and research papers on gear motor technology, advancements, and applications. These publications provide authoritative and up-to-date information from industry experts and researchers.

4. Online Forums and Communities:

Online forums and communities dedicated to engineering, robotics, and automation can be excellent resources for discussions, insights, and practical experiences related to gear motors. Websites like Stack Exchange, engineering-focused subreddits, or specialized forums provide platforms for individuals to ask questions, share knowledge, and engage in discussions with professionals and enthusiasts in the field. Participating in these communities allows individuals to learn from real-world experiences and gain practical insights.

5. Educational Institutions and Courses:

Technical colleges, universities, and vocational training centers often offer courses or programs in mechanical engineering, mechatronics, or automation that cover gear motor fundamentals and applications. These educational institutions provide comprehensive curricula, textbooks, and lecture materials that can serve as reliable resources for individuals interested in learning about gear motors. Additionally, online learning platforms like Coursera, Udemy, or LinkedIn Learning offer courses on topics related to gear motors and motion control.

6. Trade Shows and Exhibitions:

Attending trade shows, exhibitions, and industry conferences related to automation, robotics, or motion control provides opportunities to learn about the latest advancements in gear motor technology. These events often feature product demonstrations, technical presentations, and expert panels where individuals can interact with gear motor manufacturers, industry experts, and other professionals. It’s a great way to stay updated on the latest trends, innovations, and applications of gear motors.

When seeking reliable resources, it’s important to consider the credibility of the source, the expertise of the authors, and the relevance to the specific area of interest. By leveraging these resources, individuals can gain a comprehensive understanding of gear motors and their applications, from basic principles to advanced topics, enabling them to make informed decisions and effectively utilize gear motors in their projects or applications.

gear motor

Are there environmental benefits to using gear motors in certain applications?

Yes, there are several environmental benefits associated with the use of gear motors in certain applications. Gear motors offer advantages that can contribute to increased energy efficiency, reduced resource consumption, and lower environmental impact. Here’s a detailed explanation of the environmental benefits of using gear motors:

1. Energy Efficiency:

Gear motors can improve energy efficiency in various ways:

  • Torque Conversion: Gear reduction allows gear motors to deliver higher torque output while operating at lower speeds. This enables the motor to perform tasks that require high torque, such as lifting heavy loads or driving machinery with high inertia, more efficiently. By matching the motor’s power characteristics to the load requirements, gear motors can operate closer to their peak efficiency, minimizing energy waste.
  • Controlled Speed: Gear reduction provides finer control over the motor’s rotational speed. This allows for more precise speed regulation, reducing the likelihood of energy overconsumption and optimizing energy usage.

2. Reduced Resource Consumption:

The use of gear motors can lead to reduced resource consumption and environmental impact:

  • Smaller Motor Size: Gear reduction allows gear motors to deliver higher torque with smaller, more compact motors. This reduction in motor size translates to reduced material and resource requirements during manufacturing. It also enables the use of smaller and lighter equipment, which can contribute to energy savings during operation and transportation.
  • Extended Motor Lifespan: The gear mechanism in gear motors helps reduce the load and stress on the motor itself. By distributing the load more evenly, gear motors can help extend the lifespan of the motor, reducing the need for frequent replacements and the associated resource consumption.

3. Noise Reduction:

Gear motors can contribute to a quieter and more environmentally friendly working environment:

  • Noise Dampening: Gear reduction can help reduce the noise generated by the motor. The gear mechanism acts as a noise dampener, absorbing and dispersing vibrations and reducing overall noise emission. This is particularly beneficial in applications where noise reduction is important, such as residential areas, offices, or noise-sensitive environments.

4. Precision and Control:

Gear motors offer enhanced precision and control, which can lead to environmental benefits:

  • Precise Positioning: Gear motors, especially stepper motors and servo motors, provide precise positioning capabilities. This accuracy allows for more efficient use of resources, minimizing waste and optimizing the performance of machinery or systems.
  • Optimized Control: Gear motors enable precise control over speed, torque, and movement. This control allows for better optimization of processes, reducing energy consumption and minimizing unnecessary wear and tear on equipment.

In summary, using gear motors in certain applications can have significant environmental benefits. Gear motors offer improved energy efficiency, reduced resource consumption, noise reduction, and enhanced precision and control. These advantages contribute to lower energy consumption, reduced environmental impact, and a more sustainable approach to power transmission and control. When selecting motor systems for specific applications, considering the environmental benefits of gear motors can help promote energy efficiency and sustainability.

gear motor

How does the gearing mechanism in a gear motor contribute to torque and speed control?

The gearing mechanism in a gear motor plays a crucial role in controlling torque and speed. By utilizing different gear ratios and configurations, the gearing mechanism allows for precise manipulation of these parameters. Here’s a detailed explanation of how the gearing mechanism contributes to torque and speed control in a gear motor:

The gearing mechanism consists of multiple gears with varying sizes, tooth configurations, and arrangements. Each gear in the system engages with another gear, creating a mechanical connection. When the motor rotates, it drives the rotation of the first gear, which then transfers the motion to subsequent gears, ultimately resulting in the output shaft’s rotation.

Torque Control:

The gearing mechanism in a gear motor enables torque control through the principle of mechanical advantage. The gear system utilizes gears with different numbers of teeth, known as gear ratio, to adjust the torque output. When a smaller gear (pinion) engages with a larger gear (gear), the pinion rotates faster than the gear but exerts more force or torque. This results in torque amplification, allowing the gear motor to deliver higher torque at the output shaft while reducing the rotational speed. Conversely, if a larger gear engages with a smaller gear, torque reduction occurs, resulting in higher rotational speed at the output shaft.

By selecting the appropriate gear ratio, the gearing mechanism effectively adjusts the torque output of the gear motor to match the requirements of the application. This torque control capability is essential in applications that demand high torque for heavy lifting or overcoming resistance, as well as applications that require lower torque but higher rotational speed.

Speed Control:

The gearing mechanism also contributes to speed control in a gear motor. The gear ratio determines the relationship between the rotational speed of the input shaft (driven by the motor) and the output shaft. When a gear motor has a higher gear ratio (more teeth on the driven gear compared to the driving gear), it reduces the output speed while increasing the torque. Conversely, a lower gear ratio increases the output speed while reducing the torque.

By choosing the appropriate gear ratio, the gearing mechanism allows for precise speed control in a gear motor. This is particularly useful in applications that require specific speed ranges or variations, such as conveyor systems, robotic movements, or machinery that needs to operate at different speeds for different tasks. The speed control capability of the gearing mechanism enables the gear motor to match the desired speed requirements of the application accurately.

In summary, the gearing mechanism in a gear motor contributes to torque and speed control by utilizing different gear ratios and configurations. It enables torque amplification or reduction, depending on the gear arrangement, allowing the gear motor to deliver the required torque output. Additionally, the gear ratio also determines the relationship between the rotational speed of the input and output shafts, providing precise speed control. These torque and speed control capabilities make gear motors versatile and suitable for a wide range of applications in various industries.

China Standard SL21 1000W MID Drive BLDC Motor with Gears for Dirt Bike, ATV and Golf Cart   vacuum pump booster	China Standard SL21 1000W MID Drive BLDC Motor with Gears for Dirt Bike, ATV and Golf Cart   vacuum pump booster
editor by CX 2024-03-02


Leave a Reply

Your email address will not be published. Required fields are marked *