Description
Motor RV-3SB – Motor Assy J1 for Mitsubishi RV-3SB / RV-3SDB / RV-3SJB
The motor RV-3SB is available from ROBTEC as an original spare part, ex stock.
The Motor Assy J1 for the Mitsubishi RV-3S series is the drive motor of the base axis for these compact 6-axis robots with 3 kg payload. As a brushless DC motor with high-resolution encoder, this servo motor enables precise position control of the J1 rotary motion and is therefore essential for the overall accuracy of all robot movements.
Technical features and function
The RV-3S series is among Mitsubishi’s most widespread compact robots and is used in electronics manufacturing, assembly automation and laboratory technology. Despite its compact design, the J1 motor has to deliver high dynamics combined with precision. The brushless design ensures freedom from maintenance and a long service life. The integrated encoder reports the current position back to the robot controller in real time.
Installation position
Installed in the robot base, the J1 motor drives the rotation of the entire robot arm about the vertical axis. It is the most heavily stressed drive element, as it has to accelerate and decelerate the inertial mass of all subsequent links plus payload.
Compatibility
- Mitsubishi RV-3SB
- Mitsubishi RV-3SDB
- Mitsubishi RV-3SJB
- Axis: J1 (base rotation)
- Original Mitsubishi spare part
Availability
Mitsubishi has discontinued production. Spare parts are now only available in limited quantities worldwide. As the RV-3S series is in use in numerous production lines, we recommend procuring replacement motors at an early stage.
Alongside spare parts, ROBTEC also offers retrofit and modernization services for your Mitsubishi robots. We support you in switching to successor models or in modernizing existing systems.
Inquire now
Secure this spare part while stocks last. Request your quotation now — our specialist team will advise you competently and deliver quickly.
Questions about this product? Contact us via our contact form – we will be happy to advise you.
Safeguarding production with a spare parts stock
An unplanned stoppage of your Mitsubishi robot quickly costs several thousand euros per hour. With a servo motor in stock, you reduce the downtime to a minimum. ROBTEC delivers this servo motor tested and ready for immediate use – so that your production is up and running again as quickly as possible.
Quality promise
- Original spare part from the manufacturer Mitsubishi
- Tested and functional – ready for immediate installation
- Fast shipping – usually delivered within 1–3 working days
- Technical advice from experienced robotics engineers
Service and advice
Not sure whether this part fits your robot? Our technical team will help you identify and select the right spare part. Contact us via our contact form or by phone.
Alongside spare parts, ROBTEC also offers maintenance, retrofit and repair for Mitsubishi industrial robots. We take care of the regular servicing of your entire robot fleet.








