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  2. Spring Valley Historic District - Wikipedia

    en.wikipedia.org/wiki/Spring_Valley_Historic...

    The residential buildings are predominantly two-and-one-half-story, stuccoed stone structures, some of which date to the mid-eighteenth century. Notable buildings include the Upper Mill or Spring Valley Mill (c. 1740), the Lower Mill (c. 1820), a blacksmith and wheelwright shop, a cooperage, a store, and two inns—the "Neff's Tavern" and ...

  3. Parallel (engineering) - Wikipedia

    en.wikipedia.org/wiki/Parallel_(engineering)

    Parallels supporting a vee block and a workpiece. A parallel is a rectangular block of metal, commonly made from tool steel, stainless steel or cast iron, which has 2, [1] 4 or 6 faces ground or lapped to a precise surface finish.

  4. Bridgeport (machine tool brand) - Wikipedia

    en.wikipedia.org/wiki/Bridgeport_(machine_tool...

    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.

  5. 2.5D (machining) - Wikipedia

    en.wikipedia.org/wiki/2.5D_(machining)

    A 2.5D machine, also called a two-and-a-half-axis mill, possesses the capability to translate in all three axes but can perform the cutting operation only in two of the three axes at a time due to hardware or software limitations, or a machine that has a solenoid instead of a true, linear Z axis. A typical example involves an XY table that ...

  6. Speeds and feeds - Wikipedia

    en.wikipedia.org/wiki/Speeds_and_feeds

    Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.

  7. Tandem rolling mill - Wikipedia

    en.wikipedia.org/wiki/Tandem_rolling_mill

    A tandem rolling mill is a rolling mill used to produce wire and sheet metal. It is composed of two or more close-coupled [clarification needed] stands, and uses tension between the stands as well as compressive force from work rolls [clarification needed] to reduce the thickness of steel. It was first patented by Richard Ford in 1766 in England.

  8. Stop block - Wikipedia

    en.wikipedia.org/wiki/Stop_block

    A stop block is a simple reusable jig used in metalworking and woodworking to locate a common edge of a workpiece so that multiple workpieces can get the same operation performed quickly. Common applications are table saws and manual milling machines , but they are also used on miter saws , band saws , radial arm saws , and abrasive saws .

  9. V-block - Wikipedia

    en.wikipedia.org/wiki/V-block

    V-Blocks are precision metalworking jigs typically used to hold round metal rods or pipes for performing drilling or milling operations. They consist of a rectangular steel or cast iron block with a 120 degree channel rotated 45-degrees from the sides, forming a V-shaped channel in the top. A small groove is cut in the bottom of the "V".