Product Announcements:
Power Transmission

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...

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...

Precision gear & dial hubs from SDP/SI are designed to fit gears or dials and eliminate keys or splines. Identified as the S2F06Y-.... series, these 303 stainless steel hubs feature our patented Fairloc® design. The compact self-contained design is perfect when hub O.D. is limited. Read more...

Anti-backlash gears manufactured by SDP/SI (ISO 9001 + AS9100D Registered) feature an effective way to eliminate backlash in gear trains that include small-diameter gears. Designated as pin-type mini-lash gears, each gear is composed of a set of two gear halves that give the appearance of a split gear. Read more...

Commercial and precision spur gears manufactured by Stock Drive Products/Sterling Instrument are produced to ISO Class 7 specs and stocked in a wide variety of materials including stainless steel, aluminum, aluminum alloy, nylon, acetal, brass and steel. Our spur gears are available in 120, 96, 80, 72, 64, 48, 32, & 24 Pitch with pressure angles of 20° degrees and 14-1/2° deg... Read more...

SDP/SI offers an off-the-shelf series of inch and metric size splined sleeve type flexible couplings that offer torsional resiliency to absorb load pulsations and shocks in instrumentation applications. The couplings can accommodate up to 7 degrees of angular misalignment and transmit up to 1/2 hp at 1750 rpm. Read more...

A new series of inch couplings from SDP/SI feature unique lattice design allows for very large axial, radial, and angular misalignments while transmitting high torque loads with zero backlash. The 34 couplings identified as the S50CLM-... and S50CLP-... inch series, feature a maximum angular offset of 7°. A complete series of 24 metric lattice couplings with similar spe... Read more...

SDP/SI (ISO 9001 + AS9100D Registered) offers several different series of pulleys for 1/5" small pitch timing belts. They offer positive, efficient power transmission for belt drives, with no slip or backlash and minimal vibration. These pulleys are designed to operate with synchronous toothed belts. Read more...

Precision internal gears from Stock Drive Products / Sterling Instrument (ISO 9001 + AS9100D Registered) are available from stock in inch and metric sizes. These 20° pressure angle inch gears are offered in 303 stainless steel or 2024-T4 anodized aluminum. The metric gears in Modules 0.5, 0.8, & 1 are ISO Class 7 and are stocked in 5, 8 & 10 mm face widths. Read more...

SDP/SI offers a large selection of precision ground shafting to fit a wide variety of applications. With straightness as low as .0002 inches per inch, they provide highly precise alignment where necessary. Diameters start as low as .0311”, and shaft lengths as low as 1”, so they can be used for miniature applications as well. Read more...