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1957 Additions to Factory totaling 22,821 square feet.1955 Sept., Addition to Factory – 3,968 square feet.1954 March 17, 20,000 Bridgeport Miller shipped.1953 April 30, Profit Sharing Plan started.1951 – First Bridgeport Miller shipped from here – 14,476th Miller) 1948 Oct., 10,000 Bridgeport Miller sold.1946 Addition of Factory - 5,190 square feet.1945 Jan., 5,000 Bridgeport Miller sold (Machinery Sales of Calif.).1944 Addition to Factory – 4.200 square feet.1941 Addition to Factory – 2,400 square feet.1939 Incorporation of Bridgeport Machines.
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8, First Bridgeport Turret Milling Machine shipped (to Precision Castings Corp. 1932 First Universal Milling Attachment shipped (to Atlas Tool of Bridgeport).Bannow and Magnus Wahlstrom began business Association Bannow purchased the Bridgeport Pattern and Model Works Machine slides are of the dovetail type, and rotary bearings are mostly of the roller and ball types.īridgeport Machines Inc. Both Morse and R8 allow for both collets and solid holders and a drill chuck can be held by either of the latter. Machine tapers for toolholding include Morse tapers (on early models) and the R8 taper (a widely used standard that Bridgeport created) on most models. Typical table sizes are 9″ × 49″ (Y and X, respectively) and 10″ × 54″. All of the heads offer variable speeds, the earlier ones via a step pulley (cone pulley) and the later ones via either continuously variable transmission (CVT) systems or variable-speed drive.
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Today the Bridgeport brand still produces this configuration in both manual and computer numeric control (CNC) versions, although tool-changer-equipped machining centers are now equally prominent members of the product line.īridgeport manual milling machines have come in many types and sizes over the years, including (but not limited to) the C head (original), R head (heavy duty C head), M head, J head (and high speed, 5440 RPM version), 2J1 1/2 head (1.5 HP Vari-Speed), 2J2 (2HP Vari-speed), and Series II head (4HP Vari-speed). Many other companies have cloned the form. The company’s manual milling machines have been so successful that the term "Bridgeport" is often used to refer to any vertical milling machine of the same configuration, regardless of make. The first Bridgeport milling machine (serial number 1) is on display at the Museum. The American Precision Museum's biography of Rudolph Bannow reports that he conceived the iconic design in 1936 as the logical machine on which to mount the milling head already being built by the Bridgeport Pattern and Model Works (which he owned with partner Magnus Wahlstrom). It became famous in the following decades for small- and medium-sized vertical milling machines, with an iconic form of quill-equipped multiple-speed vertical milling head with a ram-on-turret mounting over a knee-and-column base. The original corporation was founded in Bridgeport, Connecticut and started selling its machines in 1938.