Small Mechanical Components: Precision Gears, Gear Assemblies, Timing Belts, Timing Belt Pulleys, Couplings, Bearings and much more - SDP/SI gear manufacturer, precision gears, timing pulleys, gears, pulleys, timing belts, couplings, mechanical components, small mechanical components, synchronous drive components, bearings, drive components, brakes, clutches, differentials, foot mounts, gearheads, speed reducers, hardware, linear motion systems, plastic components, motors, gearmotors, right angle drives, shafts, shaft accessories, universal joints, vibration mounts. SDP/SI is the leader in the design and manunfacture of precision mechanical components, such as precision gears, gear assemblies, timing belts, timing belt pulleys, and couplings.