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Brush-commutated dc motors are smooth-running and quiet

23 September 2010

Pittman Series 8690 brush-commutated dc motors from Ametek offer smooth-running performance and quiet operation in a small but powerful package. The 26mm iron core dc motors incorporate bonded neodymium iron boron magnets providing economical alternatives to coreless products. Key motor features include seven-slot skewed armatures for reduced cogging, resin-impregnated windings for enhanced reliability, and diamond-turned commutators for maximum brush life.

The motors are available in three lengths and can provide continuous torque output up to 22.4mNm (141mNm peak) and speeds up to 9,000rpm.

A cartridge brush assembly serves to reduce audible and electrical noise and significantly improves brush life by maintaining optimum brush force throughout the life of the motor.  Motor products can also be customised with optical encoders, custom cables, shaft modifications, shaft-mounted pulleys and gears, ball bearings, RFI suppression components, and other options to satisfy specific application requirements.

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