Motor-Controller Units

SDP/SI - Stock Drive Products/Sterling Instrument is a U.S.-based manufacturer of power transmission and motion control products, serving customers since 1950. The company specializes in precision gears, high-quality mechanical components, gearboxes, and the assembly of both mechanical and electromechanical subassemblies. SDP/SI is part of the Designatronics family of brands, offering a wide range of stock mechanical component options and customized solutions to meet diverse engineering needs.

The Tsubaki brand has been globally recognized for its superior power transmission and motion control products. Since 1917, The Tsubakimoto Chain Company, headquartered in Japan, has been moving the needle forward by constantly innovating new products and expanding its global operations.