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Home / Product Series / Frameless Outrunner Torque Motor / RO Series Frameless Outrunner Torque Motor / RO40 KV140 Lite

RO40 KV140 Lite

Name: RO40 KV140 Lite Frameless Torque Motor For Joints & Gimbals
Brand: CubeMars
SKU: AJD15010010
Price: 51.90 USD
Availability: InStock

Available points：0 Points ▏ Points reward：51 Points

• Ultra-low cogging torque, smooth low-speed operation
• Minimalist Lite design for ultra-lightweight performance
• Frameless architecture enables seamless embedded integration
• Large hollow-through structure for flexible cable management
• Open thermal design enhances continuous operation reliability

51.90

RO40 KV140 Lite

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Product Description

CubeMars RO40 KV140 Lite Outrunner Frameless Torque Motor As a lightweight version of the RO series, the RO40 KV140 Lite removes the outer casing and Hall sensors while retaining the core motor, aiming to provide developers with the most flexible integration solution.

This series fully inherits the outstanding electromagnetic performance of the RO series and delivers excellent smoothness even at extremely low speeds. The minimalist frameless design greatly cuts down motor weight and reduces system inertia, enabling versatile integration with precision joints, gimbals and custom reducers. Its large-diameter hollow allows multiple cables to pass through coaxially, making it a professional solution for applications requiring high power density and compact structure design.

Core Specifications

Motor Dimensions: Φ46.3*13mm
Motor Weight: 60g
Peak Torque: 0.6 N·m
No-load Speed: 3400 RPM

Key Features

Ultra-Low Cogging Torque: Extremely low cogging torque effectively eliminates mechanical jitter, ensuring smooth and seamless power output.
Extreme Lightweight Design: The Lite version removes the outer casing and Hall sensors, significantly reducing weight.
Large Hollow Design: Large-diameter hollow through-hole design addresses internal wiring constraints in miniature joints, enabling seamless integration with diverse mechanical configurations.
High Efficiency & Reliability: Optimized thermal adaptability enhances operational stability under high dynamic loads.
High Customizability: Ultra-compact structure enables deep integration with harmonic reducers and planetary reducers, meeting the stringent requirements of various non-standard automation equipment.

Packaging Contents

RO40 KV140 Lite Outrunner Frameless Torque Motor *1
Certification *1

Designed for Efficiency, Built for Integration

The RO Lite series outrunner frameless torque motors remove the outer casing and sensors, engineered for ultimate space efficiency and high performance

Smooth & Precise Control

Cogging torque is reduced by 50% compared to similar motors, effectively eliminating low-speed stuttering and delivering silky-smooth torque output

Ultra-Lightweight, Fast Response

The caseless Lite design weighs only 60g. It delivers a peak torque of 0.6 N·m within the compact dimensions of Φ46.3*13mm

Large Hollow Shaft, Flexible Wiring

The stator features a large-diameter hollow, allowing power cables, signal wires, or mechanical shafts to pass through coaxially

Engineered for Flexible Integration

Supports user integration with various high-precision encoders and reducers, enabling unlimited possibilities for integrated development of non-standard equipment

Technical Drawing

Specification

Size mm	Φ46.3*13mm	Insulation Class	F
Weight g	60g	Insulation Withstand Voltage	500V
Drive Method	FOC	Insulation Resistance	10MΩ
Operating Ambient Temperature	-20℃~50℃	Phase	3
Pole Pairs	14

Electrical Specifications
Maximum Continuous Power W	51	Electrode Constant N·m/√W	0.52
Rated Power V	24	Speed Constant RPM/V	141
Rated Torque N·m	0.2	Torque Constant N·m/A	0.068
Peak Torque N·m	0.6	Back EMF Constant V/kRPM	7
Rated Speed RPM	2450	Rotor Inertia g·cm²	122.11
No-Load Speed RPM	3400	Phase Resistance mΩ	1700
Rated Current A	2.85	Phase Inductance uH	580
Peak Current A	11.6	Electromechanical Time Constant ms	2.2
Maximum Torque Density N·m/kg	10	Electrical Time Constant ms	0.34
Cogging Torque N·mm	6

Analysis Chart

Cogging Torque Curve

Product Comparison

category	Model	Rated Voltage (V)	Rated Power (W)	Rated Torque (Nm)	Rated Current (A)	Rated Speed (RPM)	Peak Torque (Nm)	Peak Current (A)	No-load Speed (RPM)	Phase to Phase Resistance (mΩ)	Phase to Phase Inductance (μH)	Pole Pairs	Weight (G)	Size (diameter *length) MM	Hall Sensor	Temperature Sensor	Operation
RO Series Frameless Outrunner Torque Motor	RO100 KV55-Standard-with-hall	48	838	4	20	2000	12	62	2550	143	137	21	710	Ф113.5*36.2	Yes	Yes
RO Series Frameless Outrunner Torque Motor	RO100 KV55 Lite without hall	48	838	4	20	2000	12	62	2550	143	137	21	525	Ф108.3*28	No	No
RO Series Frameless Outrunner Torque Motor	RO80 KV105-Standard-with-hall	48	490	1.3	15	3600	4	50	5040	120	103	21	352	Ф92.6*26.4	Yes	Yes
RO Series Frameless Outrunner Torque Motor	RO80 KV105 Lite without hall	48	490	1.3	15	3600	4	50	5040	120	103	21	265	Ф88.6*17.7	No	No
RO Series Frameless Outrunner Torque Motor	RO60 KV115-Standard-with-hall	48	352	0.8	8.5	4200	2.4	40	5520	300	395	14	248	Ф73.8*23	Yes	Yes
RO Series Frameless Outrunner Torque Motor	RO60 KV115 Lite without hall	48	352	0.8	8.5	4200	2.4	40	5520	300	395	14	195	Ф70.5*15	No	No
RO Series Frameless Outrunner Torque Motor	RO40 KV140 Lite	24	51	0.2	2.85	2450	0.6	11.6	3400	1700	580	14	60	Ф46.3*13
RO Series Frameless Outrunner Torque Motor	RO50 KV108 Lite	24	66	0.3	3.4	2100	0.9	0.9	2600	1035	460	14	105	Ф41.7*14.5