What is major diameter of thread?

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 major diameter and minor diameter?

Major Diameter is the largest diameter of a screw thread. Whereas, Minor Diameter is the smallest diameter of a screw thread.

How do you find the major diameter?

Blank Diameter = MAX thread pitch diameter – . 002 inches [or . 051 MM]. From the time the thread roll penetrates into the blank diameter down to the minor diameter, the material displaced by the rolling process will be displaced onto the adjacent thread, above the blank diameter, to form the major diameter.

How do you find the major and minor diameter of a thread?

Minor Diameter = Major Diameter – (D + D) = . 750 – (. 075 + .

What is the effective diameter of a screw thread?

Theory: Effective diameter of screw thread is the diameter of pitch cylinder which is coaxial with the axis of the screw and intersects the flanges of the thread in such way as to make width of thread and the width of spaces between the threads equal.

What are the dimensions of a thread?

Dimensions of a Thread. The length of a thread is 54 inches. This term is basically used to measure cotton yarn. It goes together with other significant aspects of cotton count such as the term ‘tex,’ which specifically refers to the weight of a kilometer of yarn in grams.

What is minor diameter thread?

The minor diameter is the lower extreme diameter of the thread. Major diameter minus minor diameter, divided by two, equals the height of the thread. The minor diameter of a nut is its inside diameter. The minor diameter of a bolt can be measured with go/no-go gauges or, directly, with an optical comparator.

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.