General Machinery & Mfg. Co.

General Machinery and Manufacturing Company, or GMMCO, makes precision machined parts. Its main process is CNC lathe turning. This means computer-controlled machines spin metal while cutting tools shape it. The parts serve the energy, aerospace and transportation markets.

GMMCO is a family machine shop in Chicago, Illinois. The site says it has been in business for over 100 years. Stephen Junkunc II came from Hungary and founded the company in 1918. It began as a tool and die shop. His sons and son-in-law later built a large metal stamping business for casket hardware.

The company has changed over time. It grew from a basic metal stamping shop into a CNC precision machining business. It now makes complex parts for many industries. The business is run by the fourth generation of the family, under Erik Junkunc.

The shop works in a 25,000 square foot building in Chicago. The site says its floor uses the newest CNC lathe turning technology and a team of CNC specialists. It follows lean workflow ideas and works to improve all the time. One method it lists is dual spindle machining with live tooling, which finishes parts complete in one setup.

GMMCO holds ISO 9001:2015 and AS9100 Rev D certification. These are quality standards, and AS9100 is for aerospace. It is also a Pratt and Whitney approved supplier. The site says the shop has over 50 years of aerospace experience. It says it offers aerospace quality at industrial prices.

The company says it understands the pressure of tight deadlines. It handles requests for quotes by email. Customers should send drawings, specifications, quantities and any special needs. The sales team says it replies within 24 to 48 hours.

The website has pages on machining capabilities, the company story and sample parts. It also lists the holidays when the shop is closed.