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Threads, Fasteners, and Springs - NIU

Threads, Fasteners, and Springs MEE270, KIM, NIU 1 Examples of Screws MEE270, KIM, NIU 2 Head Styles MEE270, KIM, NIU 3 Drive Types MEE270, KIM, NIU 4 Nut Types MEE270, KIM, NIU 5 Washer Types MEE270, KIM, NIU 6 SCREW thread - A ridge of uniform section in the form of a helix on the external or internal surface of a cylinder. 12-1 Screw thread Terms MEE270, KIM, NIU 7 external thread - A thread on the outside of a member, as on a shaft. INTERNAL thread - A thread on the inside of a member, as in a hole. MAJOR DIAMETER - The largest diameter of a screw thread (for both internal and external threads). MINOR DIAMETER - The smallest diameter of a screw thread (for both internal and external threads). PITCH - The distance from a point on a screw thread to a corresponding point on the next thread measured parallel to the axis.

Threads, Fasteners, and Springs MEE270, KIM, NIU 1. Examples of Screws MEE270, KIM, NIU 2. Head Styles MEE270, KIM, NIU 3. ... internal and external threads). MINOR DIAMETER - The smallest diameter of a screw thread (for both ... Thread Rolling A die, which is a hardened tool with the thread profile, is pressed on to a rotating

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Tolerancing - ceet.niu.edu

www.ceet.niu.edu

Tolerance are assigned so that any 2 mating parts will fit together, as shown in (a). In this case, the actual hole may not be less than 1.25 inch and not more than 1.251 inch; these are the limits for dimension, and the difference between is the Tolerance. A metric version is shown in (b).

  Tolerance

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