(1) Check the zero reading.
(2) Place the part to be measured in between the measuring faces.
(3) Advance the spindle by rotating the thimble until the measuring faces tough the part to be measured.
(4) Note the reading both on barrel scale and the circular scale of the thimble.
Reading = (Reading on barrel) + (0.01 x Reading of the thimble).
Sleeve Reading = 12.00
Thimble Reading = 0.01 x 8
Therefore, Anvil Gap = 12.00 + 0.08 = 12.08
Note; Inside Micrometers and Depth, Micrometers used to measure internal dimensions and depths respectively, works with the same principle of micrometer screw gauge.
The reading of these instruments are the same.
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 Check the zero reading. (2) Place the part to be measured in between the measuring faces. (3) Advance the spindle by rotat...){kind=link}
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