Gearless Speed Reducers
SDP/SI speed reducers with traction drive typically out lasts conventional gearboxes.
Stock Drive Products/Sterling Instrument (SDP/SI) introduce a line of Speed Reducers with traction drive technology. With only 6-moving parts, the reducer’s cooling and lubricating traction fluid regularly changes from liquid-to-solid-to-liquid as the driving and driven elements interface in the drive. According to the company, the product features infinite ratios up to a ratio of 5:1, reduction of motor torque ripple, low vibration and noise level, and less maintenance than a conventional gearbox. Traction Drive is available in NEMA size 17 (S9117T-…) and NEMA size 23 (S9123T-…) in ratios 2:1, 3:1, 4:1, and 5:1.