Explain the parts of a screw gauge briefly...(all the parts)..Follow me,I'll follow u back!✌✌☺
Answers
SCREW GAUGE [MICROMETER SCREW GAUGE]
(i) Ratchet : The ratchet is attached to the screw by means of a spring. When the flattened end of the screw comes in contact with the stud, the ratchet becomes free and makes a rattling noise.
(ii) Circular scale : The hollow cylinder moving over the sleeve cylinder is tapered from one end. On the tapered end are made some graduations. The scale marked on sleeve is called circular scale.
(iii) Main scale : Main scale is a reference line or base line graduated in mm, which is drawn on the sleeve cylinder parallel to the axis of the nut.
(iv) Nut and screw : These are the fundamental parts of a micrometer screw gauge. The nut is threaded from inside whereas the screw from outside.
Other parts of screw gauge include U-frame, Stud, Sleeve cylinder, etc.
The screw gauge is an instrument used for measuring exactly the diameter of a thin wire or the width of a sheet of metal. It comprises of a U-shaped mount which is fixed with a screwed pin which is fixed to a thimble. Side by side to the axis of the thimble, a scale passed in mm is inscribed.
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