Steel Rule Used to measure with only. Keep clear of moving machinery. Avoid laying other tools on the rule. Wipe with an oily cloth before storing. Clean with steel wool. Make measurements from 1” line. Store rules separately.
Micrometer Place micrometer on work carefully so anvil face and spindle will not be damaged. Keep clean. Wipe with oily cloth. Avoid springing a micrometer. Clean anvil and spindle before use.
Micrometer Avoid placing where it may fall or have other tools on top of it. Roll the thimble not the frame. Never make a micrometer reading until a machine has come to a complete stop.
Vernier Caliper / Digital Caliper Outside diameter. Inside diameter. Hole depth. Back of caliper for height or length.
Vernier Caliper / Digital Caliper Never force the tool when making measurements. Handle as little as possible. Check for accuracy. Lay height gages on their side.