|
| |
TM 9-254
4-2.Use of Gages - Continued
Example 2: (fig. 4-11)
The largest numbered graduation on the barrel is 1. There are two unmarked graduations to
the right of 1. The graduation on the thimble coinciding with the revolution line is 22.
0.100 inch - Largest number on revolution line between 0 and the edge of the thimble.
0.050 inch - The sum of the two unmarked graduations between 1 and the edge of the thimble
(each unnumbered graduation represents 0.025 inch).
0.022 inch - Number of the graduations on the thimble coinciding with the revolution line.
0.172 inch - The correct final reading. Example 3: (fig. 4-12)
Figure 4-11. Micrometer Barrel Setting - .172 inch
0.300 inch - Largest number on the revolution line between 0 and the edge of the thimble.
0.025 inch - One unmarked graduation between 3 and the edge of the thimble.
0.001 inch - Number of the graduation on the thimble between 0 on the thimble and the
revolution line.
0.326 inch - The correct final reading. If the 0 on the thimble coincided with the revolution line,
the correct reading would be 0.325 inch; if the 0 were but one graduation above
the revolution line, the correct reading would be 0.324 inch.
Figure 4-12. Micrometer Barrel Setting - .326 inch
4-10
|
