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Frameless Motors for Robotic Joints, Actuators & Precision Motion Systems

Beetle Motor provides a complete range of frameless brushless motors for robotic joints, compact actuators, AGV systems, medical devices and precision motion equipment.

With 4 product series and 140 SKUs, our frameless motor platform covers cost-effective standard models, thermally enhanced high-density motors, robot joint motors, and project-based custom solutions. Whether your priority is torque density, compact size, thermal performance, dynamic response or cost control, we help engineers quickly match the right frameless motor to their application.

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Choose by Frame Size

OD Classmm	OD Includedmm	Stator Height Rangemm	Rated Torque RangeNm	Available Series	Recommended Applications	View Models
14–19	14 / 16 / 19	8.8–34	0.0034–0.04	Pro	Robotic fingers, miniature actuator modules, and space-constrained mechanisms	View Models
25	25	8–20	0.02–0.07	Pro / Precision	Robotic hands, compact grippers, and small precision motion modules	View Models
38–43	38 / 43	10.8–26.8	0.08–0.51	Pro / Ultra / Precision	Grippers, dexterous robotic hands, and compact robot joints	View Models
50–60	50 / 60	12–34.2	0.27–1.53	Pro / Ultra / Precision	Robotic joints, industrial automation actuators, and integrated motion modules	View Models
69–76	69 / 70 / 76	19.1–38.6	0.55–2.62	Pro / Ultra / Precision	Legged robot joints, medium-size robotic actuators, and high-torque-density motion modules	View Models
85–94	85 / 94	13–45.2	0.44–4.46	Pro / Ultra / Precision	Larger robot joints, AGV/AMR actuator systems, and industrial motion equipment	View Models
104–127	104 / 115 / 127	25–65.8	3.3–13.1	Pro / Ultra / Precision / BOT	Humanoid and legged robot actuators, large robotic joints, and high-load industrial motion systems	View Models

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Compare Frameless Motor Series

Choose Pro for scalable production, Ultra for enhanced reliability and integration, and Precision for custom performance requirements.

Series	Core Advantage	Positioning	Best For	Lead Time	Cost Level
Pro	Quality-assured performance with strong cost efficiency	Standard platform for scalable prototypes and volume production	Projects that need reliable performance, fast delivery, and controlled cost, such as robotic joints, dexterous hands, AGV / AMR, and industrial automation	15–25 business days	$ / Best value
Ultra	Potted stator, Hall sensors, improved consistency, and higher reliability	Integration-ready upgrade for more demanding motion systems	Applications that require better thermal stability, easier control integration, lower vibration, lower noise, or more consistent performance	25–35 business days	$$ / Higher than Pro
Precision	Custom-designed for maximum performance potential	Engineering-driven solution when standard platforms are not enough	Projects with strict requirements for torque density, low cogging, compact size, advanced magnetic design, or custom performance targets	Project-based (typically around 60–80 business days)	$$$/ Custom

Bot Series – Humanoid Robot Joint Solution

Series	Core Advantage	Positioning	Best For	Lead Time	Cost Level
BOT	Purpose-built for humanoid robot joints	Application-specific motor platform	Humanoid robot joints, quadruped joints, and actuator modules	40–60 business days	$$$ / Application-specific

The Bot Series is specifically designed for humanoid robot joint applications, with optimized torque, size, and integration characteristics tailored for actuator development.