FACTORS TO CONSIDER WHEN USING GAGE BLOCKS - Continued
Verifying gages, setting
5 to 20
Setup of grinding, milling
40 to 100
instruments, and tool
and drill machines, and
Layout of jigs, fixtures and
20 to 40
dies, setting instruments,
and tool inspection.
CARE OF RING AND SNAP GAGES
Always make certain that the surfaces of the
parts gaged and the gage itself are kept free
from abrasives, dirt, grit, chips, and all foreign
CARE OF GAGE BLOCKS
Observe particular care when using gage blocks
to measure hardened work. The danger of
scratching is increased when the work is as hard
as the block, or harder.
Never touch the measuring surfaces of blocks
any more than necessary. The moisture from
your hands contains an acid which, if not
removed, will eventually stain the blocks.
Always consider the abrasive action of the part
on the gage. Cast iron, steel, and cast
aluminum are more abrasive than brass,
bronze, and nonmetals such as plastics. Use
particular care when gaging cast iron, steel, and
When gages are stored, arrange them neatly in
a drawer or case so that they do not contact
other tools or each other.
Always hold the gages in your hands when
checking. Never clamp them in a vise.
At frequent intervals, check all gages for
accuracy and wear with gage blocks or master
Before using blocks, ensure there is no grease,
oil, dirt, or any foreign substances on block.
Every time a set of blocks is used, all the blocks
which have been cleaned for use must be
covered with a film of acid-free oil, such as
boiled petrolatum, before they are put away.
Wipe them with an oiled chamois as you return
the blocks to their places in the case.