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The Bridgeport logo as cast into the head of a Bridgeport Knee Mill. The patented "2J" head ensures that any heat buildup in the spindle bearings, belt, or quill area is kept to an absolute minimum. This results in increased belt and bearing life as well as consistent accuracy with no external cooling fans required, increasing rigidity and ...
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By 1936, their company was called the Bridgeport Pattern and Model Works and was offering milling heads (the part of a mill where the spindle is) commercially. The American Precision Museum's biography of Rudolph Bannow [ 2 ] reports that he conceived the iconic Bridgeport ram-and-turret, knee-and-column design in 1936 as the logical machine on ...
His company commenced manufacturing a new knee-and-column vertical mill in 1938. This was the Bridgeport milling machine, often called a ram-type or turret-type mill because its head has sliding-ram and rotating-turret mounting. The machine became so popular that many other manufacturers created copies and variants.
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It specialized in vertical boring mills and was largely responsible for the development of the modern form of that class of machine tools. [2] The firm was founded in 1894 by Edward Payson Bullard Sr. (born April 18, 1841, in Uxbridge, Massachusetts, US; died December 22, 1906, in Bridgeport, Connecticut, US [3]).