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  2. Tap and die - Wikipedia

    en.wikipedia.org/wiki/Tap_and_die

    where is the tap drill size, is the major diameter of the tap (e.g., 10 mm for a M10×1.5 tap), and pitch is the pitch of the thread (1.5 mm in the case of a standard M10 tap) and so the correct drill size is 8.5 mm. This works for both fine and coarse pitches, and also produces an approximate 75% thread.

  3. Thread restorer - Wikipedia

    en.wikipedia.org/wiki/Thread_restorer

    A thread restorer is a tool used to fix threads on nuts or bolts that have become damaged. One type of thread restorer is a thread restoring file or thread file. [1] There are other types of thread restoring tools as well, for example a chaser tap or chaser die. [2] Normal taps and dies can also be used to clean up a thread, which is called ...

  4. Die head - Wikipedia

    en.wikipedia.org/wiki/Die_head

    One set of chasers would be used at a time, each chaser is inserted into the die head (in the correct order) and the die head is closed bringing the chasers down to their cutting position. When sufficient length of thread has been cut the die head will open allowing for rapid retraction of the head without interference with the newly formed thread.

  5. North American Fire Hose Coupler Incompatibilities - Wikipedia

    en.wikipedia.org/wiki/North_American_Fire_Hose...

    [1] [25] 7.5 threads per inch were selected not just as a compromise between the 6, 7, and 8 threads per inch then in use, but because tools and methods had been developed to facilitate the conversion of existing 7 tpi and 8 tpi threads to 7.5 tpi threads, for couplings with an outside diameter ranging from 3 inches to 3 1/8 inches to the new ...

  6. Irwin Industrial Tools - Wikipedia

    en.wikipedia.org/wiki/Irwin_Industrial_Tools

    Previous logo. Irwin Industrial Tools is an American manufacturer and distributor of hand tools and power tool accessories. It is owned by Stanley Black & Decker.It is best known for producing Vise-Grip locking pliers.

  7. Cutting tool (machining) - Wikipedia

    en.wikipedia.org/wiki/Cutting_tool_(machining)

    Rotary cutting tools include drill bits, countersinks and counterbores, taps and dies, reamers, and cold saw blades. Other cutting tools, such as bandsaw blades, hacksaw blades, and fly cutters, combine aspects of linear and rotary motion. The majority of these types of cutting tools are often made from HSS (High-Speed-Steel).

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