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The inside /upper/lower caliper
The inside
calipers
are used to measure the internal size of an object.
The upper caliper requires manual adjustment
prior to fitting , fine setting of this caliper type is performed
by tapping the caliper legs lightly on a handy surface until they
will almost pass over the object . A light push against the
resistance of the central pivot screw then spreads the legs to the
correct dimension and provides the required , consistent feel that
ensures a repeatable measurement.
The lower caliperhas an adjusting screw that
permits it to be carefully adjusted without removal of the tool
from the workpiece.
