Skip to main content

Frameless Technology – What is a Frameless Motor?

A frameless motor consists of rotor and stator components which are built into a machine assembly to transmit torque to a load. It is typically integrated with other components, including a housing, shafting, bearings, feedback device and other elements to complete the servo system. The rotor portion usually consists of high energy rare earth magnets fastened to a hub which is mounted on a shaft and bearing assembly. The stator portion consists on the windings and is mounted within a housing, which can be part of the machine structure.

Kollmorgen Expertise – Frameless Solutions

Kollmorgen has mastered the art of the frameless motor through decades of involvement with a broad array of applications in countless environments. From initial work on periscope designs over 100 years ago, to gimbal systems for the first Apollo missions, to traction solutions for Mars rovers, we have applied innovative motor designs in to the most demanding applications.

Experience is the mastery of a subject gained through exposure to or involvement with that subject over time.

Frameless motor solution in a cobot joint

Reasons to consider a Frameless Design

  • Reduction in energy costs due to increased efficiency
  • Increased productivity through improved servo performance
  • Improved OEE by increased machine life and reduced maintenance
  • Smoother production flow with stable machine operation, along with faster move and settle times
  • Quiet machine operation from elimination of noisy mechanical components– Simple and quick machine assembly due to reduction in part count
  • Superior machine performance from optimized fit for your requirements
  • Innovation opportunities through flexible design elements

How do I figure out what I need?

You want to determine speed torque requirements, power needs, but also understand the form factor available for your motion elements. Start with available space and use our product selectors to narrow your choices. At this point you can see the speed, torques, and power capabilities of motors that will fit in the designated space. You can continue to review catalog specifications, or step into our performance curve generator tool to further optimize your motor selection based on available voltage, current, and ambient temperatures. Our experienced application support team is always available to help you narrow down your selection – even if all you have is your napkin design!

Decision Guide

Kollmorgen Experience

Custom, same as except, space rated, rad hardened, vacuum, submersible, pressure compensated – with our extensive experience in most any environment we can help you get the perfect fit. Check out the various applications below which capitalize on the benefits of Frameless Technology.

Talk to an Expert

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.

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.