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outside caliper[′au̇t‚sīd ′kal·ə·pər]
(in Russian, krontsirkul’), a measuring device for comparing the outside linear dimensions of parts with the measurements made with a ruler, end gauges, or a gauge. An outside caliper consists of two arc-shaped legs connected by a hinge; it sometimes has a graduated scale.
The configurations of the legs and auxiliary elements of out-side calipers differ greatly. They have measurement ranges up to 200 mm and legs up to 600 mm long.