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2. Dowel - Wikipedia

   en.wikipedia.org/wiki/Dowel

   An old solution to this problem is to plane a flat on the side of the dowel; some sources suggest planing the flat on the rough stock before the final shaping of the round dowel. [2] Some dowel plates solve the problem by cutting a groove in the side of the dowel as it is forced through; this is done by a groove screw, a pointed screw intruding ...

3. Dowel bar retrofit - Wikipedia

   en.wikipedia.org/wiki/Dowel_bar_retrofit

   Saw to a depth and length that allows the center of the dowel to be placed at mid-depth in the pavement slab. Saw slots parallel to each other and to the center line of the roadway with a maximum tolerance of 1⁄4-inch per 12 inches of dowel bar length.

4. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   An 1/8 inch left-hand drill bit. Left-hand bits are almost always twist bits and are predominantly used in the repetition engineering industry on screw machines or drilling heads. Left-handed drill bits allow a machining operation to continue where either the spindle cannot be reversed or the design of the machine makes it more efficient to run ...

5. Taper pin - Wikipedia

   en.wikipedia.org/wiki/Taper_pin

   A 1:50 taper means that one end of a 50 mm long bar will be 1 mm smaller in diameter than the other end. Inch-sized taper pins have a slightly smaller taper taper on diameter of 1:48 [ 2 ] A 1:48 taper means that one end of a 4-foot-long bar (48 inches) will be 1 inch smaller in diameter than the other end, or a 1 ⁄ 4 -inch taper over a 1 ...

6. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   In 1913, Woolley and Meredith defined them like Anthony, but gave the following dimensions: hex head cap screws up to and including 7 ⁄ 16 inch (11.1125 mm) have a head that is 3 ⁄ 16 inch (4.7625 mm) larger than the shank diameter; screws greater than 1 ⁄ 2 inch (12.7 mm) in diameter have a head that is 1 ⁄ 4 inch (6.35 mm) larger than ...

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