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Help reading a Lyman Vernier Reloaders Micrometer!

cpilericpileri Member Posts: 447 ✭✭✭
edited March 2002 in Ask the Experts
How to read a Lyman vernier micrometer??? I am holding a Lyman Vernier (the manual one, not digital or electronic) Reloader's Micrometer, and have it set exactly correctly upon a .458 Barnes Solid slug. For the life of me, it measures .457. IS that right? or am i reading it incorrectly? The directions are not too clear on the package insert. Can anyone help me to read the thing???? Its easy to get to .45 (i.e the hundredths of an inch place, the .00 point), but the thousandth and ten-thousandths of an inch (the .000 and .0000 place, the "8" in .458) i am confused on as the numbers are sideways and no big arrow points clearly to a "read here" line. Thanks for your help. Carl
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  • Tailgunner1954Tailgunner1954 Member Posts: 7,734 ✭✭
    edited November -1
    with any mic. step one is to verify the zeroafter taking the measurement the first point is the spindle marks of .100 write them down (.400) than count how many exposed hash marks above the last line @.025 each (2x.025=.050, Third how many thimble lines past the thimble zero / spindle index line @.001 (7x.001) add them up. Thats it for a standard mic.Now on your vernier scale you find whichever thimble line thats perfectly lined up to a spindle line (0-9) That spindle number is your .0001 numberHope that helps
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