Kenroc Tools Corp. is celebrating 50 years of operation this year, which marks the inception of its predecessor, the Craig Bit Co. In 1940 two brothers, Ernest and Robert Craig, developed the detachable bit that was new to the mining industry. It remains one of the revolutionary developments in the design and utilization of drill bits. During the initial years of operation, their company produced more than one million bits every month.
The breakthrough, utilizing a tapered connection which employed the Archimedes’ spiral to connect the bit to the steel, replaced the single piece “monobloc” steel.
The brothers negotiated with the Canadian Pacific Railway to lease a section of land adjacent to the main east-west line in North Bay, Ont. Although no active mines existed in the area, they recognized the city’s importance as a transportation crossroads.
During the Second World War, the Craig Bit Co. manufactured part of an anti-tank shell to help in the war effort.
Drill bits and accessories have always been a part of Kenroc’s history. The company’s contribution is part of the heritage of northern Ontario’s mining history.
To commemorate the occasion, the international manufacturer has planned a reception June 16 at North Bay’s waterfront park. Several hundred current and retired employees, their families and guests will attend the gold anniversary party.
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