USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
FIGURE 172.
USING A NARROW RULE.
FIGURE 173.
USING A SHRINK RULE.
d. Care of Rules. Coat steel rules with a rust preventive compound or
oil before storing. Make certain wood rules are stored in a dry place and
are properly wrapped to preserve the wood.
Clean rules before and after
use, so graduations are always legible. Periodically, check straightedges
against a master surface plate for accuracy. The slightest nick can result
in an incorrect reading.
Do not use rules for purposes other than those
intended.
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