U.S.-based, woman-owned precision gear manufacturer. Founded 1952. Located in Groton, Massachusetts. Supplying precision gears and motion components to OEMs in demanding industries for over 70 years.
INSCO Corporation was founded in 1952 as a niche gear manufacturer in Massachusetts. Over seven decades, the company has built its reputation on engineering-grade precision, reliable delivery, and the technical depth to support demanding OEM programs that require more than a transactional supplier.
Today, INSCO runs a full precision gear manufacturing facility in Groton, MA, with CNC gear grinding, hobbing, turning, and milling equipment and a staffed inspection lab performing analytical gear inspection to AGMA Class 15, against AGMA, DIN, ISO, and JIS standards.
As a U.S.-based, woman-owned manufacturing business, INSCO provides domestic supply chain stability and qualifies as a WOSB supplier for government and defense programs where supplier classification matters.
We serve a broad range of industries, including robotics and medical motion systems, defense, automotive, packaging, and industrial automation. The common thread is that the gear has to perform, not just meet a price.
AGMA 15 capable gear grinding. Tight tolerances. Every gear measured and documented before shipment.
Gears that hold up in critical applications, not ones that simply pass a print check. How the gear performs drives every decision we make on the floor.
Consistent quality across every production run. OEM customers rely on INSCO for supply chain stability and predictable delivery.
Engineering support from initial inquiry through production. Long-term OEM relationships built on technical credibility and delivery performance.
INSCO runs a full precision gear manufacturing facility at 412 Main Street in Groton, MA, with CNC gear grinding, hobbing, turning, milling, and inspection equipment all under one roof.
It includes a climate-controlled inspection lab that houses our CMM, analytical gear inspection machines, and hardness testing equipment, so measurements stay stable even on the tightest tolerance work.
INSCO supplies precision gears and motion components to OEMs across multiple industries. Notable customers include:
Submit an RFQ or contact our team to discuss your precision gear requirements.