Steps to find screw guage:-
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Answers
this is example of screw guage
Micrometer screw gauge is an instrument used to measure the diameter of thin wires, thickness of small sheets of glass,plastic etc. It can measure up-to 1/10 of mm (or 0.01 mm= 0.001 cm) which is usually called the least count of Micrometer.
It consists of a U-shaped metal frame F with a fixed stud A.
The right moveable and R (called Ratchet) is a cylinder type whose other end is called spindle.
A static linear scale or a main scale (usually in mm) is marked on a cylinder.
The second scale (moveable) is called circular scale or a cap scale (with 50 or 100 divisions) which is drawn on a cap called thimble ‘T’ fitted over a cylinder.
The circular scale is designed in such a way that one complete rotation of the cap moves it horizontally by 1 mm on the main scale if circular scale cap moves it horizontally by 1 mm on the main scale if circular scale division is 100 and 0.5 mm in the main scale if the circular division is 50.