Themac produces a series of grinding machines designed to be mounted on any make of bench or engine lathe. Their tool post grinder is recognized as the standard in the American industry, maintaining a niche market presence. Founded in 1936 as The McGonegal Manufacturing Company, the company has evolved under different ownerships, with a focus on quality, service, and integrity. The Illian family, the current owners, continue the tradition of manufacturing high-quality grinders in the USA. Themac's commitment to excellence remains unchanged, with a dedication to producing the best tool post grinders in their Northern New Jersey facility.