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Metrology Equipment Catalog - Rapp Industrial Sales

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2I N F O R M AT I O NI N F O R M AT I O NReading the English MicrometerExample 1A. Barrel GraduationsNumbered lines indicate .100", .200", .300", etc. Each line is .025"B. Thimble GraduationsNumbered lines indicate .001", .002", etc. up to .025"C. DatumLong Line on Barrel 012345678876CAB11439 105Step 1 Highest barrel number . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 x .100" = .300"Step 2 Number of lines between 3 and edge of thimble. . . . . . . . . 2 x .025" = .050"Step 3 Thimble line closest to long barrel line . . . . . . . . . . . . . . . . 7 x .001" = .007"Total Reading .357"Example 21 0D. Vernier LinesGraduations added 12 on Barrelfor Ten Thousandths0123 456781110987645D1 0765 342 112110123 45678 10901238076451614131211981510Step 1 Follow reading instructions from Example 1. . . . . . . . . . . . . . . . . . . . . . . . . . .357"Step 2 Notice which vernier line coincides with a thimble line . . . . . . . . . . . . . . 2 = .0002"Total Reading .3572"Note: If vernier 0 is coincident with a line on Thimble, the reading is an exactone-thousandth of an inchExample 3 Example 4 Example 5012345678171615 1413121110954 31 0151413120123 45678 97 8611105432 1 02423220123456 78 211181917020Info-10Total Reading - .788"Total Reading - .3321" Total Reading - .6431"<strong>Rapp</strong> <strong>Industrial</strong> <strong>Sales</strong>888 789-7277

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