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Frameless motors consist of a wound stator and a separate permanent-magnet rotor. They do not include the additional components that are part of a traditional housed servo motor — the motor housing, endbells. bearings, output shaft, cable connectors, feedback device or brake.

By eliminating the need to design your application to accommodate the extra components of a traditional housed servo motor, frameless motors enable you to engineer the most compact and lightest possible motion application.

Kollmorgen frameless motors provide industry-leading torque density, precision and efficiency in the most compact package. Our frameless motors are ideal for rotary actuators, submersible propulsion systems, flight control surface actuators, sensor gimbals, robot and cobot joints, or any application that requires ultimate precision, power and reliability in a compact application design.

When you can’t find the ideal-fit housed motor, frameless is your best choice. Learn more about what is a frameless motor in our Technologies Explained series.

Kollmorgen TBM2G Frameless Motor

TBM2G Series Frameless >

These next-generation frameless motors deliver high torque density for your most compact, lightest electromagnetic package, standard sizing for harmonic gearing, and scalable design to keep you on top of your global production needs.

KBM Series Frameless

KBM Series Frameless >

The KBM series offers high performance, long life, simple installation in a motor kit that can be embedded directly in your mechanical design. A huge selection of standard motors and cost-effective modifications ensure a perfect fit.

TBM Series Medium Image

TBM Series Frameless >

Our TBM series provides direct drive frameless motors designed to be directly embedded in the mechanical structure of your systems, minimizing weight, size and inertia without sacrificing performance.

RBE Series Frameless >

The frameless configuration of these relatively high-torque, low-speed, pancake-style motors eliminates shaft, bearings, endbells and couplings for reduced volume, weight and complexity when integrated directly with the load.

Incorporating Frameless Motors Into an Environmentally Resilient Design

Daily washdowns, deep-sea submersion, high radiation, high vacuum, hazardous atmospheres: When a housed servo motor can’t provide the protection you need in a compact form factor, consider embedding a frameless servo motor. Read this white paper to learn how.

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Achieving Ultimate Motion Precision Using Frameless Servo Motors

Frameless motors aren’t just for robotic joints. Compact actuators, sensor system gimbals, submersible propulsion systems and other applications benefit from direct drive precision and compact design. Learn how to directly embed a frameless motor in your mechanism.

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Engineer the Exceptional

Learn how to engineer exceptional machines, robots and vehicles with the highest-performing, most reliable motors, drives, automation solutions and more.

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Related Resources

Incorporating Frameless Motors Into an Environmentally Resilient Design

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Achieving Ultimate Motion Precision Using Frameless Servo Motors

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