INSCO Corporation is a U.S.-based, woman-owned manufacturer of precision gears and gear-driven motion components. We build precision gears and actuator components for robotics and humanoid systems, automotive, medical, defense, industrial, and specialized machinery, and our ITAR registration covers defense and aerospace-adjacent work. We work with OEMs, contract manufacturers, and aftermarket buyers, from a single prototype to full production runs. ISO 9001 certified. AGMA 15 capable.
We handle everything from single-piece prototypes to high-volume production runs, and our engineers stay involved from the first design review through final inspection.
CBN and conventional grinding for spur and helical gears. AGMA 15 quality. Controlled tooth geometry, tight tolerances, superior surface finish. Hofler, Reishauer, and Liebherr grinding platforms.
Learn More →Finish hobbing to 1000mm diameter. Full range of tooth forms: spur, helical, worm, internal, spline, sprocket, and serration. CNC autoload hobbing for high-volume efficiency.
Learn More →Integrated gearbox and mechanical sub-assemblies built to print. We deliver the finished assembly rather than loose parts, and hold the tight tolerance stack-ups that demanding applications require.
Learn More →Replacement of legacy and obsolete gears where original drawings are unavailable. 3D scanning, CMM measurement, and precision re-creation for critical industrial equipment.
Learn More →ISO 9001 quality management and ITAR registration backed by Zeiss CMM, analytical gear inspection machines, Vari-Roll gear checkers, and hardness testing. Every gear qualified to an industry standard (AGMA, DIN, or ISO) and customer specifications, with full traceability before shipment.
Learn More →CNC turning (3-axis), CNC milling (4-axis), a 5-axis machining center, OD grinding, surface grinding, honing, and induction annealing, all under one roof.
Learn More →Spur gears, helical gears, internal gears, worm gears, planetary gear sets, splines, and complex gear sets, in quantities from early prototypes to high-mix, high-volume production.
Since 1952, INSCO has built precision gears and gear-driven assemblies for OEMs, contract manufacturers, and aftermarket buyers whose equipment can't afford a weak gear. We're an engineering-driven shop, ISO 9001 certified and ITAR registered, built for the work that needs real technical depth.
Precision ground spur and helical gears achieving the highest AGMA quality classification. Controlled tooth geometry, tight involute profile tolerances, and Ra surface finish measured and certified.
Gear design, hobbing, grinding, CNC machining, heat-treatment coordination, inspection, and assembly in one place. That removes hand-offs between vendors and shortens lead times on OEM programs.
Decades of experience re-creating obsolete and legacy gears. When the original supplier or drawings are long gone, we get the equipment running again and document the part fully.
ISO 9001 quality management and ITAR registration let us work in regulated defense and aerospace-adjacent supply chains. We're a domestic, woman-owned manufacturer with a steady, experienced crew, so there's no offshore exposure to manage.
We supply gears and gear-driven assemblies across a wide range of industries, working with OEMs, contract manufacturers, and aftermarket programs where the gear is what makes the machine perform.
Print review, gear geometry analysis, tolerance stack-up evaluation, material and process selection.
Detailed RFQ response, routing, tool selection, and lead time commitment by our customer service team.
Hobbing, grinding, turning, milling, and the finishing operations that go with them, all in-house.
CMM, analytical gear inspection, hardness testing, and dimensional verification.
Certified conformance documentation, packaging to specification, and on-time delivery for production programs.
Send us a request for quote and our engineering team will get back to you with a detailed proposal. We work with OEMs, contract manufacturers, and aftermarket buyers, on anything from prototype quantities to high-volume production. ISO 9001 certified and ITAR registered.
412 Main Street, Groton, MA 01450 · CustService@inscocorp.com