1
Lesson 3
Part I
MICROMETER CONSTRUCTION
6
inside
7
We have said:
Calipers are being discussed because a micro-
outside
meter is a type of ________ .
The three basic parts of a caliper are its
_____ and an ___________ ___________ .
Calipers are designed for use in __________ or
______________ measurements.
12
scale
13
Our primary concern with the micrometer
0.001
___________ and the readings it presents is the
minimum
construction principle. This principle allows
loss
the transfer of measured dimensions to the mi-
crometer scales with a minimum loss in ________ .
18
threads
19
To express the pitch of the precision ______
per
in decimal form, you merely change the fraction
inch
1 to a decimal by diving the numerator (1) by
40
the denominator (40). This means that the pitch
in decimal form is ______ inch.
24
accurate
25
Look at foldout-18. Study the principal
pitch
components of the micrometer which are arranged
precision
to transfer the ______ ______ of the threads on
screw
the ______ ______ to the micrometer scales.
30
sleeve
31
The micrometer scale which is located on a
barrel
stationary micrometer component is the ________
thimble
or ________ scale. The scale which is located
scale
on a movable component of the micrometer is the
__________ __________ .
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