CubeMars RI30 KV260

The RI30 KV260 is a frameless inrunner torque motor with a 38 mm diameter and a height of only 14 mm. It delivers 0.23 Nm peak torque from 40 g and has a large Ø17 mm center bore. The stator and rotor are built directly into the robot structure, a high-ratio gearbox or your own servo module.

Key features

• High torque from a light body. At 40 g it delivers 0.23 Nm peak torque on 24 V, against 0.072 Nm for the RI20 from the same family.
• Ø17 mm through-bore. Despite the 38 mm outer diameter, the wide center bore can carry cables, signal lines or pneumatic tubing.
• High torque stiffness. It stays stable under sudden external disturbances and heavy loads, giving precise disturbance rejection.
• Low cogging torque. Cogging torque is 5.259 N·mm, which reduces torque ripple at low and high speed.
• Flexible integration. The frameless design lets the motor merge with precision gearboxes, custom bearings or structural parts in a single housing.

Applications

Typical applications include quadruped robots, collaborative robot joints, robotic wrists and precision medical systems that need a balance of torque, size and dynamic performance.

Is it enough for your project?

The RI30 KV260 delivers 0.076 Nm rated and 0.23 Nm peak torque. For example, a 100 g load at the end of a 7 cm wrist segment needs about 0.07 Nm of static torque (0.1 × 9.81 × 0.07). 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 6240 rpm and a rated speed of 4110 rpm. Rated current is 1.98 A, peak current is 7.72 A and maximum continuous power is 33 W. If you need a smaller, lighter motor the RI20 KV600 may be a better fit, and if you need more torque, the RI50-KV100 or the RI60 KV120.

How it compares to similar models

• RI20 KV600. The smallest in the family. At 16 V it gives 0.024 Nm rated and 0.072 Nm peak torque, weighs 20 g and is Ø25 mm. It is faster at 9600 rpm and has a Ø11.6 mm through-bore.
• RI50-KV100. At 48 V it gives 0.58 Nm rated and 1.67 Nm peak torque. It weighs 180.8 g and measures Ø54 × 27 mm.
• RI60 KV120. At 48 V it gives 0.57 Nm rated and 1.63 Nm peak torque, weighs 155.9 g and measures Ø60 × 23 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, bearings and housing are chosen by the user for the project.

Does it have Hall sensors?

No. The manufacturer supplies this model without Hall sensors, and the wiring table lists only the U, V and W phase leads. An encoder should be used for commutation and position.

What are the leads like?

The three phase leads are 200 mm long and 26 AWG. U is black, V is yellow and W is red.

In the box

• RI30 KV260 frameless torque motor

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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