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> Measuring With The Micrometer.
Figure 39. Reading A Metric Micrometer
Figure 41. Measuring Large Diameters
Precision Measuring and Gaging
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PRECISION
MEASURING
AND
GAGING
-
OD1642
-
LESSON
1/TASK
2
NOTE
Remember
that 1 complete revolution of the thimble is
0.5mm.
It takes two complete revolutions to advance
it to
1mm.
(d)
Measuring With The Micrometer.
1
When
checking a small part with the use of a
micrometer
(figure 40, view A, hold the part in one hand. Hold the micrometer in the
other hand so that the thimble rests between the thumb and the forefinger.
The third finger is then in a position to hold the frame against the palm of
the hand. The frame is supported in this
manner
making it easy to guide the
work over the anvil. The thumb and the forefinger are in position to turn
the thimble either directly or through the
ratchet
, bringing the spindle
down
against the work.
FIGURE
40.
USING
OUTSIDE
MICROMETER
.
61
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