Sleeve scale Micrometer features are given below.
Step-by-step explanation:
Measurements taken with micrometer are a combination of the value shown on the sleeve scale and the value indicated on the rotating sleeve scale.
- The value of the first significant figure of a measurement can be found on the sleeve scale.
- This will be the number immediately to the left of the thimble.
- On a metric micrometer, this will be given in millimetres. Each minor increment on the sleeve scale represents 0.5mm.
- In this example, the reading on the sleeve scale is 6.5mm.
- Each number on the sleeve of the micrometer represents 5 millimeters (mm) or 0.005 meter (m).
- Each of the 10 equal spaces between each number, with index lines alternating above and below the horizontal line, represents 0.5mm or five-tenths of a mm.. One revolution of the thimble changes the reading one space on the sleeve scale or 0.5 mm.
- The beveled edge of the thimble is divided into 50 equal divisions with every fifth line numbered: 0, 5, 10,5. Since one complete revolution of the thimble advances the spindle 0.5mm, each graduation on the thimble is equal to one hundredth of a millimeter.
- As with the inch-graduated micrometer, the three separate readings are added together to obtain the total reading.