SDP/SI engineers and manufactures precision gears, gearboxes, and motion control components in the USA, delivering custom mechanical solutions for demanding aerospace, defense, medical, and automation applications. (read more)

Simple modifications to complex designs are handled by our engineers, machinists, and assembly technicians daily. Using CNC machines and Coniflex bevel gear generators we manufacture gears and mechanical components to precise specifications and world-class quality. From opening a bore to a complete custom gear we ensure the component will meet your need the first time and every time. (read more)

SDP/SI manufactures high-quality gears, mechanical components, and complex gear assemblies for the most well-known names in aerospace, medical and robotics. Engineering and manufacturing processes are done in house, giving us better control over lead times and responsiveness to our customer's requests. We look forward to working with you. (read more)

Stock Drive Products/Sterling Instrument, ISO 9001 + AS9100 certified, designs and manufactures custom components and assemblies to meet customers needs. Precision machining in a variety of materials, custom capabilites include precision gears, gearboxes, differentials, and planetary gearheads. (read more)

SDP/SI offers a variety of different worms and their mating worm gears. They are available in various materials, metal or molded. These can be made custom with different numbers of teeth, custom bores, and passivation for stainless steel. Our engineering department can help your find the solution for your specific requirements. (read more)

SDP/SI – Stock Drive Products/Sterling Instrument is a U.S. manufacturer delivering precision shafting, gears, custom mechanical assemblies, and engineered motion control solutions for high-performance industries since 1950. (read more)

SDP/SI is a leading manufacturer and global supplier of timing belts and pulleys. Not only does SDP/SI keep a large assortment of standard timing belts on-the-shelf, but has the capability to cut custom widths on demand from existing belt material in inventory. Available profiles include: Miniature FHT®, MXL, 40 D.P., XL, L, HTD®, GT®2, GT®3, and T. (read more)

SDP/SI excels at making quality timing pulleys, both machined and molded, in all different sizes. Because we already offer so many different materials, sizes and fastening methods, if one of our many off-the-shelf pulleys doesn't perfectly suit your needs, we'll make you one that does. With a quick turn-around rate and technical and engineering support, SDP/SI is the only source you need. (read more)

SDP/SI offers high-quality metric-sized timing belt pulleys in a variety of materials, sizes or finishes. They can be machined or molded to fit your specific requirements. With a quick turn-around rate, combined with technical and engineering support, SDP/SI is the only source you need for all of your applications. (read more)