The 8540 Series brush-commutated DC motors from Pittman (Harleysville, PA) are ideal for high-tech applications found in medical devices, lab instrumentation, and precision automation machinery. The 8540 Series motors are 1.18” in diameter and are available in three lengths - 2.114”, 2.585”, and 3.057”. Depending on the model, they can achieve a continuous torque rating from 2.5 oz-in (0.018 Nm) to 8.3 oz-in (0.059 Nm) without the use of a heat sink.

The 8540 series motors are available with eight standard windings ranging from 9.55 V to 48 V. Customized windings can be designed to optimize performance for a specific application requirement. The motors have standard pre-loaded ball bearings, allowing high speeds, radial and axial shaft loading, and higher temperatures.

A new bearing support system, a 7-slot armature, and improved manufacturing techniques allow more balanced armatures resulting in very low vibration and audible noise characteristics. At low speeds, the motors exhibit very low cogging as a result of a optimized magnetic circuit design.

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NASA Tech Briefs Magazine

This article first appeared in the January, 2012 issue of NASA Tech Briefs Magazine.

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