R8 shank to Jacobs Taper #4 (4JT). Long end is the R8 shank, short end is 4JT Works great on a Bridgeport or any other machine tool with that takes R8 tooling. Made of precision ground, high grade tool steel.
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The Armstrong Manufacturing Co. of Bridgeport, Connecticut manufactured pipe machine tools (water, gas and steamfitter's tools) such as the ones illustrated on the letterhead. Letter cites terms for purchases. 5 3/4" x 8 1/2".
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REMOVED FROM WORKING MACHINERY, BRIDGEPORT VMC 800 MILL, 02/26.
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Vintage dealer brochure binder in good overall condition. Please see my photos for details.
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1-1/2" End Mill Adapter. Ground shank and hole, heat treated for double accuracy. Made for high quality steel forgings. Weight: 4.90 lbs. Item#: 2264. Precision ground concentric.
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Nice little Criterion boring head. Appears to have seen very little use, if any. 1/2" capacity, 1/2" straight shank.
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Accusize Industrial Tools R8 to 3/4" Weldon Shank Arbor Adapter, Compatible with Annular Cutters for Bridgeport Milling Machines, Durable Construction, MC08-0034. Manufacturer : Accusize Co., Ltd. R8 to 3/4" Weldon Shank Arbor for Milling Machine.
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R8 shank to Jacobs Taper #33 (33JT). Long end is the R8 shank, short end is 33JT Works great on a Bridgeport or any other machine tool with that takes R8 tooling.
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