CubeMars RO100-KV55

The RO100 is the largest outrunner model in the series. It brings stability to dynamic joints that need high torque.

Key features

• Ultra-low cogging torque. Roughly halved compared with motors in its class, so low-speed rotation is noticeably smoother.
• Wide hollow shaft. Plenty of room at the center for cables and shaft integration.
• Interchangeable shaft. By changing the shaft, the same motor fits different mechanical interfaces.
• Hall and temperature sensors. Position and temperature feedback come from inside the motor.

Applications

Typical applications include exoskeletons, collaborative robot arms, medical devices and aerospace applications.

Is it enough for your project?

The RO100 is not an actuator but a frameless torque motor. The bearing, encoder, driver and, if needed, the gearbox are part of your design. As the most powerful outrunner model in the series, it delivers 4 Nm continuous and 12 Nm peak torque.

In direct drive, this torque is enough for light-load axes such as rotary tables and camera or antenna positioners. In robot joints the motor is usually paired with a gearbox. For example, with a 50:1 harmonic drive you get about 200 Nm of continuous torque at the output, excluding losses.

How it compares to similar models

• RO100 Lite KV55. Gives the same 4 Nm rated and 12 Nm peak torque at 525 g and 28 mm tall. It is the better choice when weight and axial length are critical.
• RO80 KV105. With 1.3 Nm rated and 4 Nm peak torque it has about a third of the torque, but weighs 352 g and is twice as fast (5,040 rpm).
• RI115-PH KV40. An inrunner alternative with 5.5 Nm rated torque and a 74 mm hollow shaft. It weighs 1,108 g.

Frequently asked questions

Is the driver included?

No. With frameless motors the driver, encoder and bearing are chosen by the user. You need a 48 V FOC driver with Hall input that can deliver at least 20 A continuous. Our technical team can help you choose a suitable driver.

How does it differ from the Lite version?

Torque and speed values are the same. The standard version has higher rotor inertia (8,700 g·cm²) and a thicker body, while the Lite is 185 g lighter and 8 mm thinner.

Which sensors does it have?

Hall sensors and a temperature sensor are inside the motor and provide position and temperature feedback.

What is in the box?

Along with the motor you get a Ø1.8 × 8 mm locating pin and six M5 × 6 mm screws.

In the box

• RO100-KV55 frameless outrunner torque motor
• Ø1.8 x 8 mm locating pin
• M5 x 6 mm screw (6 pcs)

Box size 137 x 134 x 94 mm.

Integration

In frameless outrunner motors the rotor turns on the outside, which gives more torque at the same diameter. The flange, bearing, encoder and driver are designed by the user. Thanks to the wide hollow shaft, cables can pass along the axis.

Products in stock are dispatched within 3 business days from our warehouse in Turkey.

Shipping cost and delivery time to your country are shown at checkout. For models not listed in stock, ask our technical team about the lead time.

To start a return, contact us through our technical team. The product must be unused, undamaged and in its original packaging.

Return conditions for international shipments are confirmed before purchase.