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The boring process can be executed on various machine tools, including (1) general-purpose or universal machines, such as lathes (/turning centers) or milling machines (/machining centers), and (2) machines designed to specialize in boring as a primary function, such as jig borers and boring machines or boring mills, which include vertical ...
Bullard Mult-Au-Matic, a vertical, multispindle automatic lathe, 1914. [1] Memorial Day 1942 at Bullard. The Bullard Machine Tool Company was a large American machine tool builder. It specialized in vertical boring mills and was largely responsible for the development of the modern form of that class of machine tools. [2]
Bullard Jr. continued the family machine tool business and brought the turret principle to the vertical boring mill, making it a vertical turret lathe. [2] He led the development of the company's multiple-spindle Mult-Au-Matic brand machine that became an important automatic lathe in the mass production of parts for the automotive industry.
Vertical lathes in general are also called "vertical boring mills" or often simply "boring mills"; therefore a vertical turret lathe is a vertical boring mill equipped with a turret. [ 9 ] CNC VTL, 46" (1168 mm) Bullard High Column Dynatrol, built mid-1960s
The original corporation was founded in Bridgeport, Connecticut, and started selling its machines in 1938.It became known in the following decades for small and medium-sized vertical milling machines, with a form of quill equipped multiple-speed vertical milling head with a ram-on-turret mounting over a knee-and-column base.
The company had modern shops for mill work, pulp and paper machinery, general machine shop work, structural steel, power and heating, boilers and tanks, iron, and brass and aluminum castings. At the time of its construction, the machine shop contained the largest vertical boring mill between Toronto, Ontario and Vancouver, British Columbia. The ...