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Motor Cuts Casts Quietly

February 9, 2010 By Laura Carrabine

Conventional 40-year old cast saw technology is loud, cumbersome, and potentially threatening to young and old patients. A leading medical device manufacturer wanted to develop an alternative product to make the experience less of an ordeal.


The medical device manufacturer used a motor with a custom housing and shaft.

Key to the product’s design specification was a motor that would deliver consistently high torques to drive the cutting heads of the tool through several layers of cast material.  It was also critical for the motor to be compact, lightweight, and capable of extended battery operation.


The new device was designed to help reduce childrens’ trauma associated with getting a cast removed at the doctor’s office.

To meet these requirements, the company selected the high performance size 23 BLDC motor with custom housing and shaft. The standard high torque density design (P/N DIH23-30-BFNA) delivers continuous power at levels approaching 1 hp continuous speed at up to 20K rpm. Its compact size of 2.3-in. OD x 3.0-in. L with operating efficiencies greater than 85% resulted in a satisfactory motor solution – one powerful enough to drive the device blades, but small enough to support the ergonomics of the final product for a cool running, comfortable patient experience.

“It was extremely satisfying to be involved in a project that would ultimately reduce trauma for children needing cast removal,” says Walter Smith, BEI Kimco’s senior applications engineer/project manager for motors. “With our ability to adapt standard motors to meet specific customer needs, we are able to work with medical device manufacturers and other industry designers to consistently meet unique requirements.”

BEI Kimco Magnetics
www.beikimco.com

::Design World::

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