Slinger Foundry Company, Inc. was founded by M.O. Holtan as a job shop foundry.

Developed adjustable boring system for liner bore machining.

Began casting cylinder liners for the two-cycle engine industry.

Developed Centribond™ casting design for bonding centrifugally cast liners into aluminum engine blocks.

Began Hartford Mfg. Co. division as a specialized machining facility for cast iron cylinder liners.

Built Sparta Mfg. Co. casting facility. Began high volume production of two and four cycle cylinder liners.

Helped develop "loop charged" two-cycle cylinder liner technology.

Patented Ribondex cylinder liner design and manufacturing method for aluminum block engines and compressors.

Built new corporate offices and liner machining facilities in Slinger, WI.

Installed Disamatic Automatic molding at Sparta Mfg. Co.

Helped develop fully machined two-cycle liners for press-fit application.

Changed corporate name to Slinger Manufacturing Company, Inc.

Installed computerized autoline for casting of cylinder liners at Sparta Mfg. Co.

Patented "threaded liner" method for joining iron liners to aluminum engine blocks.

Developed automated liner machining system CNC verticals.

Opened Plant 3 in Hartford, WI for machining of V-6 automotive cylinder liners.

Established joint venture in China for the production of Slinger centrifugally cast cylinder liners and aluminum pistons.

Entered into maquiladora agreement for the processing in Mexico of Slinger cylinder liners of automotive V-6 engines.