Since 1950, design engineers have depended on SDP/SI for high-quality components, subassemblies, and engineering expertise. As a company founded and managed by engineers we understand and respond to the developing needs of our customers better than anyone.

Inch and metric small off-the-shelf mechatronic components. Helical, spur, screw and worm gears, pulleys, belts, shafts, couplings, pulleys, sprockets, belts and associated hardware.  The one-stop source for mechatronic components. Over 200 machinists.

High quality precision gears and gear assemblies in quantities for prototype to OEM's. We make what others can't. Helical, Worm, Spur, anti-backlash, miter and internal gears, racks, assemblies. AGMA 14.

Large inventory of high quality small inch and metric bearings from major manufacturers. Sizes up to Services include bearing lubrication and maintenance capabilities.



Product Lines

Inch and metric small off-the-shelf mechatronic components. Helical, spur, screw and worm gears.

Pulleys, belts, shafts, couplings, pulleys, sprockets, belts and associated hardware. 

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