Direct Drive product comparison

Click 'learn more' for a quick overview comparison of our direct drive motor products. Learn More >>


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Direct Drive Linear and Rotary Motors


Kollmorgen pioneered the development of direct drive technology, and today offers the broadest range of direct-drive motors in the industry. Direct drive motors offer industry-leading performance, zero maintenance, clean mechanical assembly, improved accuracy, higher throughput, better reliability, and smooth, quiet operation to suit a wide variety of machine design needs.

Mechanical transmission, such as gearboxes, timing belts, pulleys or lead screws, introduce backlash, mechanical losses and objectionable audible noise that can reduce machine performance, increase machine size and weight.

Direct Drive motors, either housed rotary (DDR), cartridge rotary (CDDR) or frameless (KBM high-voltage rotary or TBM low-voltage rotary or DDL linear motors) directly mount to the load to be driven thereby eliminating the transmission, providing a much more robust alternative. System maintenance is greatly reduced as mechanical parts prone to wear are removed, dramatically improving MTBF. Also improved are load acceleration, lower power consumption, reduced system inertia, and higher precision are major advantages that direct drive solutions can provide.


Cartridge Direct Drive Motors - Kolmorgen

Cartridge DDR®

Our exclusive Cartridge DDR® servomotors combine the performance advantages of a frameless motor with the ease of installation of a full-frame motor. The advanced electromagnetic design provides up to 50 percent more torque density than comparably sized conventional servo motors.

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Housed DDR Medium

Housed D & DH

Housed DDR servomotors offer high torque density, precise performance and zero maintenance in an easily installed servo solution.

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KBM Series Frameless

The KBM™ series offers high performance, long life and simple installation in a motor kit that can be embedded directly in your machine design.

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TBM Series Medium Image

TBM Series

The Kollmorgen TBM (Torquer Brushless Motor) Series direct drive frameless motor is designed to be directly embedded in your machine, using the machine’s own bearings to support the rotor.

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The RBE Series from Kollmorgen is a proven platform offering many years of direct drive motor solutions. As the saying goes, these motors are ‘oldies but goodies’ and continue to be viable solutions where relatively high torque and low speed, pancake type motor configurations are required.

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Direct Drive Linear

A Direct Drive Linear (DDL) motor is basically a rotary motor that is laid out flat and directly coupled to the driven load, eliminating the need for ball/lead screws, rack and pinions, belts/pulleys and gearboxes.

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Serviced Motors

While these direct drive rotary servomotors are not available for new applications, Kollmorgen continues to provide replacement motors and support for existing customers.

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US Production