INSCO Corporation is a U.S.-based, woman-owned manufacturer of precision gears and gear-driven motion components for industrial, robotics, medical, and specialized machinery applications — plus defense and aerospace-adjacent programs, backed by our ITAR registration. We partner with OEMs, contract manufacturers, and aftermarket buyers from prototype through high-volume production. ISO 9001 certified. AGMA 15 capable.
From single-piece prototypes to high-volume production runs, INSCO delivers precision gear solutions across the full spectrum of complexity — with engineering support from initial design 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. Complete solutions rather than standalone components — engineered for demanding applications with tight tolerance stack-ups.
Learn More →Replacement of legacy and obsolete gears where original drawings are unavailable. 3D scanning, CMM measurement, and precision recreation 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 inspected against AGMA and customer-specified tolerances, with full traceability before shipment.
Learn More →CNC turning (3-axis), CNC milling (4-axis), 5-axis machining center, OD grinding, surface grinding, honing, induction annealing, and shrink fitting — complete value-added manufacturing under one roof.
Learn More →Including spur gears, helical gears, internal gears, worm gears, splines, shafts, pinions, and complex gear sets — from early-stage prototyping through high-mix, high-volume production.
Since 1952, INSCO has supplied precision gears and gear-driven assemblies to OEMs, contract manufacturers, and aftermarket buyers where performance cannot be compromised. We are not a transactional machine shop — we are an engineering-driven manufacturing partner for critical applications, certified to ISO 9001 and registered under ITAR.
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 — eliminating supplier chains and compressing lead times for OEM programs.
Decades of experience recreating obsolete and legacy gears. We restore critical equipment to operation when original sources are no longer available — with full documentation.
ISO 9001 quality management and ITAR registration enable participation in regulated defense and aerospace-adjacent supply chains. Domestic, woman-owned manufacturing with a stable, experienced workforce — supply-chain reliability without offshore exposure.
Engineered solutions. Trusted performance. Powering a wide range of industries with precision-crafted gears and gear-driven assemblies — for OEMs, contract manufacturers, and aftermarket programs where gear quality directly determines system performance.
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 engineering team.
Hobbing, grinding, turning, milling, and value-added operations — complete in-house capability.
CMM, analytical gear inspection, hardness testing, and dimensional verification against AGMA standards.
Certified conformance documentation, packaging to specification, and on-time delivery for production programs.
Submit a request for quotation and our engineering team will respond with a detailed proposal. Whether you're an OEM, a contract manufacturer, or sourcing replacement gears for the aftermarket, we support prototype quantities through high-volume production programs — ISO 9001 certified and ITAR registered.
412 Main Street, Groton, MA 01450 · CustService@inscocorp.com