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Ideas in Motion

The Designatronics SDP/SI Center Distance Designer Tool

Jun 17, 2020 6:00:00 AM / by posted in Engineers, Pulleys, Belts, Mechanical Design


With a global customer base of over 15,000 firms in the aerospace, defense, medical, and industrial sectors, Designatronics, Inc., has emerged as a leader in the design and sale of high-quality small power transmission components. Since it began operations in 1950, the company has expanded to three brands: (1) Quality Bearings and Components (“QBC”); (2) QTC Metric Gears (“QTC”); and (3) Stock Drive Products/Sterling Instrument (“SDP/SI”).  Its 87,000 powertrain products include gears, belt and chain drives, shafts, shaft accessories, bearings, couplings, universal joints, vibration mounts, miscellaneous components, hardware, gearheads and speed reducers, right angle drives, brakes and clutches.

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Pulleys: Did You Know?

May 3, 2019 9:02:00 AM / by posted in History, Pulleys, Belts


The evolution of pulleys is fascinating. These mechanisms we take for granted in everyday life actually have their roots in civilizations dating back 5500 years. Since then, the number of improvements and uses have increased to a staggering level, forever revolutionizing societies across the globe.

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