In 1942, mechanical engineer Louis Small established the Service Diamond Tool Co. to manufacture grinder dressers, and, within a few years, hardness testers. Small remained active until at least the 1970s and the business survived him into the 2010s and then was acquired by Sun-Tec Corp.

During the 1940s through to 1970, Small was granted a series of patents related to the manufacture of grinder dressers as well as the grinder dressers themselves and hardness testing machines. Son Howard Small was co-inventor on one of the patents. Another co-inventor was Michael G. Antonik, on a 1966 patent, which is of some note because the president of Sun-Tec Corp. is Mark Antonik.

Information Sources

• 1940+ ASTM Bulletin, Issues 243-250, p. 16, lists Service Diamond Tool Co. as an exhibitor at a trade fair. We cannot tell which issue this listing was in and cannot be certain about the date.
• 1945 Catalog of Copyright Entries, Part 1, Volume 42, p. 101, lists "Service Diamond Tool Co., Ferndale, Mich. Service diamond tools. Specifications and applications. © Dec. 24, 1944".
• 1946 Michigan Directory of Manufacturers lists "Service Diamond Tool Co. 2505 Burdette, Ferndale 20".
• 1984 Detroit Telephone Directory lists this firm.
• 1985 American Export Register lists "Service Diamond Tool Co., 2505 Burdette Ave., Ferndale, MI 48220."
• 1997 U.S. Industrial Directory lists "Service Diamond Tool Co., Ferndale, MI 48220".
• 2001 Saint Clair County Telephone Directory lists "Service Diamond Tool Co 6169 Lk Shore Rd PtHrn 810-385-4436".
• 2002 obituary for Louis Small, from the Sarasota Herald Tribune.
• Bloomberg's listing for Service Diamond Tool Co. says that the company was founded in 1942.
• The company was in business recently enough to be shown in MapQuest and Google Maps, at 46590 Ryan Ct, Novi, MI 48377". But Google Search reports that the company is "Permanently Closed".