Types and Uses - Continued

TM 9-243 TYPES AND USES - Continued SLIDE CALIPERS 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 man- ual for reading scales and rules. VERNIER CALIPERS OUTSIDE INSIDE 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. 6 - 3