TYPES AND USES - Continued
Slide calipers can be used for measuring outside and
inside dimensions. Graduations are in inches, fractions,
or millimeters. As shown above, one side of the caliper
is used to measure outside (1) and the other side is used
to measure inside (2) dimensions. Stamped on the
frame (3) are the words "IN" and "OUT" (4). You use
them when taking inside and outside measurements.
The other side of the caliper is used as a straight
measuring rule. If necessary, see chapter 3 of this
manual for reading scales and rules.
Vernier calipers work like slide calipers. As shown
above, vernier calipers can make very accurate outside
or inside measurements. A vernier caliper is used by
loosening the two locking screws (1) and (2). This
allows the movable jaw (3) to move along the rule until
desired position is obtained. The locking screw (1) is
then retightened securing the movable jaw (3). Any fine
adjustments to the vernier scale (4) are then made using
adjustment control (5). Locking screw (2) is then
secured and vernier caliper is ready to read.