Custom direct drive torque motor

tailored to your special application needs

Mosrac’s innovative stator and rotor design, combined with a skilled engineering team, allows standard motors to be customized for specific needs, even in small volumes at a reasonable cost. Custom frameless servomotors help customers gain a competitive advantage. We also developed multiple cooling options and can adjust connectors, shafts, and mounting to improve performance and efficiency.

Mosrac has developed custom motors with our customers for over 10 years, offering a range of shapes and sizes; see some examples below.

the examples of custom direct drive torque motor

Our dedicated engineering, design, and sales teams

support you at 8 levels

We are always happy to help. If you can’t find the information you are looking for, please don’t hesitate to reach out to us! Experience the power of customization and take your project to new levels and heights.

General custom development stages

1. Gathering and analyzing requirements

Identify the specific needs of your application, such as load requirements, operational environment, space limitations, power, voltage, and performance criteria.

2. Defining the specifications

Defining specifications for customizing direct-drive torque motors involves several key details, including peak and continuous torque, speed, size, etc.

3. Conducting feasibility analysis & study

Conducting a feasibility analysis for customizing direct-drive torque motors involves evaluating technical, financial, market, and risk factors.

4. Concept Eng. & product development

Concept engineering for customizing direct-drive torque motors involves idea generation, concept selection, and preliminary design to explore feasible solutions.

5. Prototyping, testing, and design verification

Prototyping, testing, and design are key steps in frameless motor development. A prototype is built for early evaluation. Testing verifies performance, reliability, and compliance. Design verification ensures the final motor meets all requirements and is ready for mass production.

6. Trial-produce and mass manufacturing

Trial production and mass manufacturing are critical for making frameless motors and involve creating small batches to identify and resolve potential issues, ensuring design integrity and manufacturing processes, and then arranging the mass manufacturing.

7. Customized Packing and safe shipping

Packing and shipping are crucial for delivering frameless motors safely. Proper packing involves using protective materials to prevent damage during transit, selecting reliable logistics partners, and implementing tracking systems to ensure timely, secure delivery.

8. High-Quality Warranty and service

A comprehensive warranty provides assurance against defects and covers repairs or replacements. Excellent service includes responsive customer support, regular maintenance, and readily available parts.


Custom Motors Showcase

Below are some examples of custom frameless servo motors we have designed, prototyped, and built for our clients.


Some of Our Customization Cases

Please take a look at some of the custom direct-drive torque motor cases we have brought to life.

Frameless Brushless Direct Drive Torque Motors for a Collaborative Robot System
Frameless Brushless Direct Drive Torque Motors for a Collaborative Robot System
Frameless Brushless Direct Drive Torque Motors for a Collaborative Robot System



We Are Your Best Solution for
Frameless Motors · Encoders · Joint Modules

Help you choose custom torque motors that lower costs, higheroutput, and better performance.


Our customized torque motor solution for a specific application

We offer customized industry-matched frameless and housed torque motors for your needs. To make torque motors better, easier, and more affordable for everyone, everywhere.


Our customized torque motor solution for a specific application

We offer customized industry-matched frameless and housed torque motors for your needs. To make torque motors better, easier, and more affordable for everyone, everywhere.


Our customized torque motor solution for a specific application

We offer customized industry-matched frameless and housed torque motors for your needs. To make torque motors better, easier, and more affordable for everyone, everywhere.



Most Frequently Asked Questions And Answers

Have questions about our custom motors? Find clear answers to common customer inquiries we get before closing the deal.

What is your minimum order quantity (MOQ)?

Our MOQ varies by motor and level of customization. To get an accurate MOQ for your desired product, please contact our sales team. We understand that every business is unique, and we strive to accommodate a range of order sizes.

Can you produce quantities below your MOQ?

While we recommend meeting our MOQ to optimize production efficiency, we can consider smaller orders on a case-by-case basis. For samples or small quantities, please contact our sales team for personalized assistance.

How long is your production time?

Production time usually takes 10 to 30 days, but depending on product complexity and order volume. For exact estimates and to see product-specific lead times, please visit our product pages.

What types of motors do you offer?

We specialize in standard or custom frameless motors, including inrunner & outrunner. It includes a range of torque outputs, sizes, speeds, and currents to meet diverse application needs.

Can U get prototypes before the custom motor goes into production?

Yes, we provide digital proofs for your review and approval before starting production. This ensures that the final product meets your exact specifications.

What industries do your motors serve?

Our motors are widely used in robotics, automation, medical equipment, semiconductor manufacturing, printing, packaging, and other industries requiring precise motion control.

Do you offer motor customization?

Yes, we focus on custom motor, including design, engineering, and manufacturing. Our engineers can work closely with you to develop a motor tailored to your specific requirements.

How do you ensure product quality?

We uphold strict quality control measures throughout the production process, including material inspection, assembly testing, and final performance verification. We follow industry standards and certifications to ensure product reliability.

What is your warranty policy?

We provide a standard warranty on our products. Specific warranty terms and conditions may differ based on the motor model and purchase agreement. Please consult our warranty documentation for detailed information.

What is your lead time for custom motor orders?

Lead times vary based on product complexity and order volume. Typically, it ranges from 2 to 6 weeks. For exact timelines, please consult with our sales team.


Our Happy Customers From 70+ Countries

Our customers speak louder than us.
Mosrac’s tailored motor solution transformed our medical device. Their expert team provided exceptional support, resulting in a product that surpassed our expectations in performance and reliability.
Dr.Emily Carter
CEO-MedTech Innovations
Mosrac’s deep understanding of our specific needs led to a motor solution that perfectly met our requirements. Their precision engineering and exceptional service have dramatically improved our manufacturing efficiency.
Dr.Emily Carter
CEO-MedTech Innovations
The exceptional quality of Mosrac’s torque motors is a testament to their commitment to excellence. These motors have far exceeded our performance expectations and are a key component of our success.
Dr.Emily Carter
CEO-MedTech Innovations



Paul
Content marketer & product specialist @Mosrac

Content marketer @Mosrac. I’ve been in digital marketing for the past 6 years and have spoken at some of the industry’s largest conferences in Asia.



1. Gathering and analyzing requirements.

Identify the specific needs of your application, such as load requirements, operational environment, space limitations, power, voltage, and performance criteria.

2. Defining specifications.

Defining specifications for customizing direct-drive torque motors involves several key details, including peak and continuous torque, speed, size, etc.

3. Conducting feasibility analysis & study.

Conducting a feasibility analysis for customizing direct-drive torque motors involves evaluating technical, financial, market, and risk factors. Assess design complexity, manufacturing capabilities, and performance through simulations and prototyping.

4. Concept engineering and product development.

Concept engineering for customizing direct-drive torque motors involves idea generation, concept selection, and preliminary design to explore feasible solutions.
Product development includes detailed design, prototype development, testing, and optimization to create a high-performance, customized motor that meets customer requirements and market demands.

5. Prototyping, testing, and design verification.

Prototyping,testing, and design verification are essential in producing frameless motors. Prototyping involves creating a working model for initial evaluation. Testing assesses performance, reliability, and compliance under various conditions. Design verification confirms the final design meets all specifications, standards, and customer requirements, ensuring quality and readiness for mass production.

6. Trial-produce and mass manufacturing.

Trial production and mass manufacturing are critical for making frameless motors and involve creating small batches to identify and resolve potential issues, ensuring design integrity and manufacturing processes, and then arranging the mass manufacturing.

7. Packing and shipping.

Packing and shipping are crucial for delivering frameless motors safely. Proper packing involves using protective materials to prevent damage during transit, selecting reliable logistics partners, and implementing tracking systems to ensure timely, secure delivery.

8. Warranty and service

A comprehensive warranty provides assurance against defects and covers repairs or replacements. Excellent service includes responsive customer support, regular maintenance, and readily available parts.


Mosrac is an ISO 9001 company that provides a full range of motion-control products from a single source. We design and manufacture both customer-specific (ODM) and our own-branded (OEM) products based on our product and service offerings.

With nearly 15 years of experience, our products are built to last and deliver superior precision, accuracy, consistency, and efficiency. Whether you need a standard or custom component or motion solution, we have exactly what you’re looking for.

Mosrac specializes in:

  • AC & DC Frameless Inrunner Motors
  • DC Frameless Outrunner Motors
  • Frameless Motors for Linear Joints
  • Absolute Rotary Encoders (Inductive & Magnetic types)
  • Robot Joints

Our products fill diverse and unique applications, and perform in nearly all environments.

You can view our most up-to-date motion control products here.