RDrive Servo Motor by Rozum Robotics – All-in-One Solution – RDrive 60


RDrive servomotor by Rozum Robotics is an all-in-one solution. RDrive servomotors unite in a single housing all the main elements: an encoder, a controller, a harmonic gear, and an AC brushless motor.

Made In: United States (US)

By Rozum Robotics SKU: RDrive 60 Categories: , Tags: , , , More From:

RDrive Servo Motor by Rozum Robotics – All-in-One Solution – RDrive 60

RDrive servo by Rozum Robotics is an all-in-one robotic joint. RDrive servomotor unites in a single housing all the main elements: an encoder, a controller, a harmonic gear, and an AC brushless motor. Since the controller is integrated into the robotic actuator, the RDrive is a DC servomotor with a brushless AC core.

The service life of our servo motors is 35,000 hours. Rozum Robotics also provides a 1-YEAR WARRANTY. Our online support team is eager to help you whenever needed. Detailed video instructions and technical documentation are provided. Average servomotor lead-time 2-8 weeks. A network of international dealers and distributors for local support is available.

The first RDrive servo motor was created to drive Rozum Robotics collaborative robot that we designed and built entirely in-house. We were disappointed with the quality of cheap Asian robotic joints and were unwilling to pay for expensive customization in Europe. The factors motivated us to take it upon ourselves to design and create our robotic actuator.

Available modifications

Model: RDrive 60
Power: 65 W
Rated torque: 11 Nm
Peak torque: 28 Nm
Rated rotational speed: 55 RPM
Diameter: 53 mm
Length: 99.5 mm
Hollow shaft diameter: 8 mm
Weight: 795 g
Voltage: 48 V
Work conditions: 0 °C to +35 °С
Interface: CANopen
API: C/C++/Java/Python
Encoder: 2×19 bit, magnetic, absolute position

Most robotic joint manufacturers produce a housed brushless robotic actuator coupled with an encoder. They call it a servomotor. Powered by DC, the servomotor is controlled with the help of an external servo controller kit (sometimes called robotic servo drive or robotic actuator). In case you need a gear motor kit, you connect a gearhead to the servomotor. The overall design is whatever, but not a compact servo motor in this case.

Servo Motor Components


The built-in magnetic absolute encoders enable taking position measurements with an accuracy of 19 bits. One of the devices monitors the angular motion of the output shaft, and the other returns feedback on the positions of the rotor shaft. Feedback from the encoders indicates exact servomotor positions at a given moment and is available immediately upon powering up. No homing procedure is required because encoder readings are non-volatile. As a result, the devices are immune to temperature and humidity fluctuations, shock, vibration, and contaminants that are not ferromagnetic.


The controller is the core of the RDrive closed-loop motion control system. Tailored to be compatible with other structural elements, the integrated smart chip generates PWM signals to drive brushless AC motors to deliver the required motion output. The RDrive controller interfaces with other servo components (encoders, temperature transducers) to read or calculate position, speed, and torque. The readings and calculations determine whether the motor has reached the required position and speed and, if needed, tune the motion parameters.

Harmonic Gearbox

The RDrive series features integrated harmonic gearboxes that use strain-wave gear technology. With a gear ratio of 1:100 and an almost zero backlash, the technology delivers high-torque output without impacting the precision of servos. The integration of the gear into the servo housing eliminates the need for additional couplings while minimizing the risk of bearing failures due to misalignment. In addition, the motor and the gear mechanism are matched to work together and require no separate design and mounting procedures, thus reducing engineering costs.

Brushless Motor

Brushless motors used in servo motors by Rozum Robotics is a lineup of compact high-torque AC motors designed as frameless rotor and stator kits. The brushless technology employed in the drives enables packing impressive power into a compact footprint while minimizing friction-induced power losses and ensuring noise- and spark-free operation. In addition, with low cogging torque, FMI-series products provide smooth rotation without jerkiness.

Servo Box

Servobox solution allows for the following easy and quick integration of RDrive servos into your application, safe and correct operation of RDrive servos in the designed range of loads, as well as precise control of RDrive servo motion via the Application Programming Interface. Servobox unit is offered as an option to RDrive servos.


Supply Kit

  • 1x Servomotor
  • 1x STEP model
  • 1x API reference
  • 1x User Manual
  • 1x CANopen communication guide
  • 1x Servobox (optional)
  • 1x Low voltage equipment and electromagnetic compatibility certificate

All of our Rozum products are covered with a 1-year warranty. Each of our customers gets personalized LIVE tech support from the engineering team when requested.

Easy to get—easy to use

Designed with the plug-and-run concept in mind, our RDrive motion solutions are easy to set up and operate. Instructions, drawings, and other information as required for seamless and quick integration are available on our website. In addition, when you need more specific advice, engineers at Rozum Robotics are at your service to guide you through the adoption process and address operating issues, if any.

Frequently Asked Questions

1. Is there an upper voltage limit for the RD60 drives? The datasheet states 48V, but we are wondering if possible to go higher?
The weakest component in the schematics rated 60V maximum, so we set software limits to 52V to have a voltage gap for safety. Servos are tested and proven to work in this voltage range. We didn’t recommend setting this limit higher than 52V.

2. I need to read angles on a computer by visual studio-based application. What packages do I need?
This can be done via API. API can be compiled in the visual studio using mingw-gcc

3. What is the difference between RDrive 60 and RDrive 70? The same motor with a different gearbox or a different motor? Why less power on RDrive 70?
RDrive 60 and RDrive 70 have different frameless motors inside. The power is different because the rated torque and speed are different. Here is the formula for power calculation:

Power (W) = Speed (Rpm) * Torque (Nm) /9.55
For RDrive60: 39Nm * 55rpm / 9.55 = 225W
For RDrive70: 49Nm * 30rpm / 9.55 = 155W

4. Can we operate in temps above 35dC with a derating applied to the torque? If so, what is the derating for 40dC and 45dC?
RDrive servo motors can operate at an ambient temperature range 0….+35 dC. The thermal limit is +85 degrees. The higher the ambient temperature, the shorter the time delta before the safety system gets activated (85-35=50 dC – thermal range). If the ambient temperature is 40 or 45 dC the RDrive servo motors are expected to be operating without derating the torque. But the time delta and the thermal range will be shorter, and the safety system gets activated faster. To avoid this, there are two options: you can either choose a servo with higher-rated torque and use it at a higher ambient temperature, making it bear a smaller load, or apply an additional cooling system and use the servo that exactly meets your torque parameters.

5. Is there a process for returning the motors when the Customer changes the loading conditions? Do the motors support external feedback like a linear encoder on the load?
Built-in control system (controller) allows for a critical mistake ±0.02° throughout the whole dynamic range (there’s no need for retuning when the Customer changes the load). Static error is ±0.005°. Max error during the accelerating stage and the braking phase: ±0.1° when the acceleration is 3 radian per sec2 and ±0.2° at 5 radians per sec2.

Currently, we are working on the advanced functionality “feed-forward.” The expected delivery date of the feature – Q1’19. We assume that the max error will be 0.02-0.05 throughout the whole range. If the Customer would require 10+ motors, we integrate the feature beforehand.
As for the linear motor, for the moment, it is not possible to use external feedback. If the Customer would require that feature (depending on the Quantity request), we could develop a motor with no internal controller but designed for use with an external controller. You can use a different controller, including those supporting external feedback like (a linear encoder).






The FMI-series motors by Rozum Robotics have successfully passed EU/CE certification. The brushless AC engines have been verified for compliance with the EN 60034-1:2011/AC:2011 standard setting forth rating and performance requirements for rotating electrical machines. Performed tests proved that the product type characteristics conform to the technical requirements as stipulated in the standard.





FMI frameless motors are сomply with the requirements of the Technical Regulations of the Customs Union CU TR 020/2011 “Electromagnetic Compatibility of Technical Devices.” IEC 61000-6-4:2006 Electromagnetic compatibility of technical devices. Electromagnetic disturbance from technical devices in industrial environments. Standards and test methods. IEC 61000-6-2:2005 Electromagnetic compatibility of technical devices. Immunity to electromagnetic disturbances from technical devices in industrial environments.









Need more technical details or consultation on customization? Leave us a message — and we will get back to you in the shortest time.


There are no reviews yet.

Be the first to review “RDrive Servo Motor by Rozum Robotics – All-in-One Solution – RDrive 60”

Product Manuals

If applicable, the Product Documentation, Reference Materials, CAD design(s),.STEP file(s) and/or other drawing files, Manuals, and Tutorials will be available for download upon purchase. The order confirmation email will include a downloadable link to the product file(s), which can also be downloaded from the My Account section if needed.

Rozum Robotics LLC is an international company with representative offices in the USA and Europe, backed by a development team in Belarus. A network of distributors provides sales and service support of our products internationally—in Asia, Europe, and North America.

Shipping Policy

WE SHIP WORLDWIDE: We primarily ship via FedEx, UPS, DHL, EMS, TNT, and USPS because they are fast, reliable, and easily trackable. We usually ship within two to three business days after the full payment. Standard delivery generally occurs within 5 to 7 business days after the shipping date. However, sometimes delivery may take about 7 to 10 business days, depending on the shipping destination, logistics mode, weather conditions, product weight, size, or shipping company distribution structures based on re-planning, such as staff shortages caused by COVID.

SHIPPING COSTS: For some industrial products, e.g., heavy wheels, CNC machines, etc., the shipping cost is calculated based on the product weight, not quantity. To benefit from lower shipping costs for orders with multiple items, please contact us at sales@ozrobotics.com. Our shipping rates are listed very clearly on each product page under the SHIPPING tab. Additionally, to see the shipping cost for your country, add the item to the Shopping Cart; you will see the shipping cost based on your Country and Location.

CUSTOMS and TARIFFS: While not all products require customs fees, some products may require a minimal tariff if applicable in your country for orders with $800.00 and above. The total amount for your order does not include a customs fee/tariff. A tariff belongs to the buyer when applicable. Why don't we add tariffs to the product's retail price? - If all countries were deducted the same amount of tariff, we would have added the tariff amount to the product price. However, we do not do that because each country charges a different amount, while some do not even charge. Therefore we can't add any tariff to the product's retail pricing. Oz Robotics, our Manufacturing partner, or our Supplier is not responsible for tariffs on any shipment. Please check the "By" and "Made In" sections on each product page to see the country of the manufacturer or supplier for that product. The total amount for your order does not include any duties, import taxes, customs fees, and GST/VAT. The buyer must pay all import duties. Please click here to see more on Tariffs.

Return Policy

COVID: We are suspending product returns due to the current COVID-19 pandemic unless there is a manufacturing defect. Please study the product and ask us questions before you buy. Thank you.

ORDER CANCELLATION: After you place an order, you have 5 hours to request an order cancellation. After 5 hours, your item(s) have either already been shipped, prepared to ship, or are currently being custom-made. It means we will not process your cancellation request after this period has passed. By placing your order, you signify that you agree to be bound by our Order Cancellation Policy.

PAYPAL and STRIPE SERVICE FEES: Please note both PayPal and Stripe do not offer a refund for the service fees they charge when you purchase a product. Therefore, after placing an order, if you change your mind and ask for a refund, we will deduct the service fee for PayPal or Stripe, whichever one you used to purchase. If you have any questions about this, please contact PayPal or Stripe.

EXCHANGE POLICY: Oz Robotics wants you to be happy with your new purchase. However, we abide by the exchange policy of our suppliers because we do not manufacture these products; our suppliers do. Once you used the product, our supplier(s) and we have the right not to issue a refund. Still, we will offer an exchange for the wrongly purchased items or products with serious and irreversible defects or technical problem(s). The buyer will pay the shipping fee for wrongly purchased products or any other similar issues. If the product you purchased is defective, please email us at support@ozrobotics.com with some photos or a video of the defective parts to evaluate before you send it. Click HERE for more on Refund and Replacement Policy

REFUND POLICY: Oz Robotics accepts refunds on a minimal basis unless there is a manufacturing defect. For any electronic items, returns are only accepted on devices with serious and irreversible problems; meanwhile, the customer must apply for the returns within seven days from the delivery date. Before a refund acceptance, please include images or a video and any other material proof of the defect. However, we abide by the exchange policy of our suppliers because we do not manufacture these products; our suppliers do. For more info on Refund and Replacement Policy please visit Refund and Replacement Policy.

Other than our supplier’s default policy, once a return is agreed upon, you can ship your defective item to the provided return address that you should receive from us first. Please ship the order in original packaging with all the accessories and additional parts. If the Required Parts are not sent back, they will be billed for or expected to be shipped at a later stage. And only once all items have arrived will our staff check the returned product for testing. Include in your package a signed letter stating the reason for your return and the original receipt as well as any mentioned proof of defect, images, or a video, etc. It will help us to speed up the process on your behalf.

The purchaser (customer/buyer) is responsible for all shipping costs when returning an item. However, upon receiving the returned order, we will assess the product. If it is determined that there is, in fact, a manufacturing defect, then we will refund the shipping costs as well as repair or replace or refund the full amount to the purchaser if the product is not fixable.

If you wish to return an unused product, please do so within seven days from the ship date for a refund on the purchase price, minus shipping, handling. Refunds will be credited to the original credit card used for payment in 24-48 HOURS after receiving the product back. We will charge 50% restocking fee.

Once your return is received and inspected, and if agreed for a refund, refunds will be credited to the original credit card used for payment in 24-48 hours. Please note that we will charge a 50% restocking fee once you return a product without any defect.

Once your refund is processed, PayPal will return the money to the card used. It may take at least five business days (depending on the bank and credit company) before your refund is posted in your bank account and statements. Contact Us if you still have not received your refund after 5 business days.

Do not return your product to our New York office. For any exchange or refunds, please email us first at support@ozrobotics.com for us to provide you with the steps that need to be followed. Any product you return must be in the same condition you received and returned in the original packaging without being used. Please keep the original receipt. More on Refund and Replacement Policy.

Shipping costs

Region / Country State Postcode Cost
Any Any Any Free shipping

Upon submitting your question, your email will include the product link automatically.

There are no questions yet. Be the first to ask a question about this product.

Send me a notification for each new answer.

Start Selling

Sell on OzRobotics.com – Reach out to millions of new customers, and increase your sales through paid advertising at no cost to you!

Sell your Hardware: Let us help you sell your hardware
Sell your Software: Let us help you sell your software
Entrepreneurs: Got a cool product? Let us help you sell