USING AN ADJUSTABLE SNAP GAGE - Continued
Move the gage to the position shown above. If
the NO GO button (4) stops the gage, the shaft
is within limits.
If the gage can be rocked further to the position,
as shown, the part diameter is too small, since
it has passed the NO GO button.
HOW TO USE PRECISION GAGE BLOCKS
Before using gage blocks, remove the coat of rust
preventive compound with a chamois or a piece of
cleansing tissue or by cleaning with an approved
solvent. Gage blocks and any measuring tool used with
them must be free of grease, oil, dirt, and other foreign
matter to avoid a lapping action whenever the block is
moved, and to ensure accurate measurement. When
using gage blocks, take particular care when measuring
hardened work to avoid scratching the measuring
When building gage blocks (wringing
them together) to obtain a desired
dimension, care should be exercised
to avoid damaging them.
Bring the blocks together flat and move them
slightly back and forth. This minimizes
scratching, as it will detect any foreign particles
between the surfaces.