MEASUREMENT OF VARIOUS ELEMENTS O THREAD

Measurement of major diameter:

Micrometer

Bench micrometer

Measurement of minor diameter:

Using taper paralles

Using rollers

Measurement of effective diameter:

Thread micrometer method

One wire method

Two wire method

Three wire method

Pitch measurement:

1.   Pitch measuring machine

2.   Tool maker‟s microscope

3.   Screw pitch gauge

Thread form and flank angle measurement: