CubeMars RO50 KV108 Lite

The RO50 KV108 Lite is one of the caseless outrunner frameless torque motors in the RO series without Hall sensors. It is 61.7 mm in diameter and only 14.5 mm high, and it delivers 0.9 Nm peak torque from 105 g. It keeps the electromagnetic design of the RO series and runs smoothly even at very low speeds.

Key features

• Smooth torque at low speed. Cogging torque is 10 N·mm. The manufacturer states it is 50 percent lower than similar motors.
• Slim profile. A height of 14.5 mm makes it easy to fit into flat joints and gimbal arms.
• Stable under high dynamic loads. Improved thermal behavior keeps operation stable during sudden load changes.
• Large hollow stator. Power and signal cables or a mechanical shaft can pass coaxially through the center of the stator.
• Open design with gearbox and encoder. It can be combined with a harmonic or planetary gearbox and a high-resolution encoder of your choice.

Applications

Typical applications include robot arm and leg joints, camera and sensor gimbals, compact actuators with harmonic gearboxes and non-standard automation equipment.

Is it enough for your project?

The RO50 KV108 Lite delivers 0.3 Nm rated and 0.9 Nm peak torque. For example, a 0.5 kg load with a 5 cm offset needs about 0.25 Nm of static torque (0.5 × 9.81 × 0.05). That load stays within the motor's rated torque. For heavier loads the motor is used with a gearbox, and output torque rises with the reduction ratio.

It runs on 24 V, with a no-load speed of 2600 rpm and a rated speed of 2100 rpm. Rated current is 3.4 A, peak current is 9.3 A and maximum continuous power is 66 W. If a lighter motor is enough the RO40 KV140 Lite may be a better fit, and if you need more torque, the RO60Lite-KV115.

How it compares to similar models

• RO40 KV140 Lite. The smallest in the family. At 24 V it gives 0.2 Nm rated and 0.6 Nm peak torque, weighs 60 g and measures Ø46.3 × 13 mm. Its no-load speed is 3400 rpm.
• RO60Lite-KV115. At 48 V it gives 0.8 Nm rated and 2.4 Nm peak torque, weighs 195 g and measures Ø70.5 × 15 mm. It offers more torque at almost the same height but needs a 48 V supply.
• RO80Lite-KV105. At 48 V it gives 1.3 Nm rated and 4 Nm peak torque. It weighs 265 g and measures Ø88.6 × 17.7 mm.

Frequently asked questions

Are the driver and encoder included?

No. A frameless motor consists only of a stator and a rotor. The driver, encoder and gearbox are chosen by the user for the project.

Does it have Hall sensors?

No. The Lite version has no Hall sensor and no temperature sensor. An encoder should be used for commutation and position, and the driver should support FOC control.

Does it run on 24 V or 48 V?

Rated voltage is 24 V. The speed, current and torque figures in the table are given for 24 V.

In the box

• RO50 KV108 Lite outrunner frameless torque motor
• Certificate of conformity

Box size 89 x 91 x 73 mm.

Related products

Our team can help you choose a driver, an encoder and the mounting design.

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.

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