Outside micrometer

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Outside Micrometer
Presented by K.LAKSHMINARAYANAN Asst.Trg Officer
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Parts of Outside Micrometer

1. Anvil
2. Spindle face
3. Spindle
4. Barrel
5. Thimble
6. Ratchet stop
7. Spindle lock
8. Frame

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Outside Micrometer
Reading on the Sleeve in 1 mm divisions 12.00 mm
Reading on the Sleeve in 0.5 mm division 0.50 mm
Thimble has passed 16 divisions line on the Sleeve (16 X 0.01 mm) 0.16 mm
TOTAL READING 12.66 mm
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Measurement errors in Micrometer
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Reading of dimensions measured using Vernier
Micrometer
Reading on the Sleeve (5 Main divisions x 1 mm) 5.000 mm
(2) No. of lines between 0.5 mm and the edge of the thimble (1 sub division x 0.5 mm) 0.500 mm
(3) Thimble has passed 28 divisions on line of the Sleeve (28 Thimble divisions x 0.01 mm) 0. 280mm
(4) Vernier line that coincides exactly with a Thimble Line (3 Vernier divisions x 0.001 mm) 0.003 mm
TOTAL READING 5.783mm