Micrometer Screw Gauge 76u19

Micrometer What is Micrometer? - Micrometer use the principle of screw to amplify small distances that too small to measure directly into rotations of the screw that are big enough to read from a scale. Type of Micrometer 1. External Micrometer – to measure the outer diameter 2. Internal Micrometer – to measure the internal diameter 3. Depth Micrometer – to measure the depth

External Micrometer Sleeve Anvil

Thimble Ratchet

Spindle

Thimble lock

Calibration Rod

Adjusting Key

Frame

Internal Micrometer

1. Set consists of: - Micrometer head with range - Several extension rods of different length 2. Reading are measured in same manner as standard micrometer.

Depth Micrometer

1. The base is seated firmly on the two parallel surfaces. 2. Extend the extension rod carefully until it touches the bottom of the area to be measured. 3. Ensure that the extension rod is perpendicular.

How to read The measured Value

5mm

1. To read the micrometer, first read the number of whole millimeters on the bottom rom of the sleeve of the micrometer.

How to read The measured Value 0.01mm

2. Second read the number of millimeters on the thimble. In thimble, the value of millimeters is 0.01mm for 1 line.

How to read The measured Value 0.01mm

5mm

3. To get the actual reading, simply add this found digit from sleeve and thimble. 5mm + 0.01mm = 5.01mm

Example of Reading 12.00 0.16

0.5

Sleeve reading = 12.50mm *If there is an additional line uncovered on the bottom row, this is equal to 0.5mm. So, 0.5mm would to be added to the measurement. Thimble reading = 0.16mm Total measurement = 12.50mm + 0.16mm = 12.66mm

Example of Reading 0.355

16.00

Sleeve reading = 16.00mm Thimble reading = 0.355mm Total measurement = 16.00mm + 0.355mm = 16.355mm

Example of Reading 0.26

7.50

Sleeve reading = 7.50mm Thimble reading = 0.26mm Total measurement = 7.50mm + 0.26mm = 7.76mm