Pittman® Motors, a division of AMETEK/Precision Motion Control (Harleysville, PA), offers high-performance slotless brushless DC motors for medical applications such as high-speed surgical tools, dental tools, medical instruments, and other small medical devices. The miniature motors produce little or no EMI emission (electromagnetic interference), provide long life, and have low audible noise. In addition, the slotless design eliminates magnetic cogging. The stator teeth are completely eliminated by forming and encapsulating the entire stator winding along the inside surface of the back iron.

The smallest motor is 0.375" (9.53 mm) with a maximum speed of up to 70,000 RPM and a torque rating of up to 0.3 oz-in (0.002Nm). Overall length is 2.00" (50.8 mm). The motor has a 2-pole permanent magnet rotor, a 3-phase stator, and sensorless commutation. Larger diameters include 0.5" (12.7 mm), 0.8" (20 mm), and 1.1" (28 mm). Maximum speeds are available up to 60,000 RPM, and torque ratings from 0.9 oz-in (0.006 Nm) to 14.9 oz-in (0.105 Nm). Each diameter has two available stack lengths. Standard features include shielded ball bearings, stainless steel construction, and high-energy neodymium rotor magnets.

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