What is the minor diameter for internal threads?

What is the minor diameter for internal threads?

The major diameter of a thread is the diameter of the imaginary co-axial cylinder that just touches the crest of an external thread or the root of an internal thread. The minor diameter is the diameter of an imaginary cylinder that just touches the roots of an external thread and (or) the crests of an internal thread.

What is minor diameter of external thread?

The minor diameter (root diameter) is the diameter of a cylinder that just touches the roots of an external thread. The crest of a thread is the top portion of a thread. The root is the lowest groove between the two flanks of the thread.

What is the minor diameter tolerance of effective diameter for external threads?

8. What is the minor diameter tolerance of effective diameter for external threads? Explanation: Minor diameter tolerance for external threads is (effective diameter tolerance + 0.013√p) for close fit and is ( effective diameter tolerance +0.02√p) for external threads in case of medium and free fit.

Which of the following tolerance grades can be used for minor diameter and pitch diameter of internal threads?

Explanation: The tolerance grades recommended for minor diameter and pitch of internal threads are 4, 5, 6, 7, and 8 and for major diameter of external threads and for pitch diameter of external threads are 4, 6, 8 and 3, 4, 5, 6, 7, 8, 9 respectively.

How do you calculate thread pitch diameter?

To calculate the pitch diameter, one must imagine a cylinder whose diameter exists at the point where the thread groove width and the thread crest width are both equal to one another and equal to half the nominal pitch of the thread. The diameter of this imagined cylinder is the pitch diameter.

What is the diameter of a thread?

Preferred sizes are 0.3, 0.4, 0.5, 0.6, 0.8, 1.0 and 1.2 mm, with additional defined sizes halfway between. The standard thread pitch is approximately 14 of the major diameter. The thread form is slightly modified to increase the minor diameter, and thus the strength of screws and taps.

What is thread minor?

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