PRECISION MEASURING AND GAGING - OD1642 - LESSON 1/TASK 2
reading.
Another attachment is a rod that permits depth readings.
Small
dial indicators can be connected to the scriber to permit extremely close
work in checking or laying out work. A vernier height gage is read the same
way as the vernier caliper.
FIGURE 4.
VERNIER HEIGHT GAGE.
(a) Care. Vernier gages also require careful handling and proper
maintenance if they are to remain accurate.
The following instructions
apply to the vernier gages in general:
1 Always loosen the binding screws before attempting to move
the sliding arms.
2 Never force a gage into position. Forcing, besides causing
an inaccurate reading, is likely to force the arms out of alignment.
3 When taking a measurement, use only gentle pressure on the
fine adjustment screw.
Heavy pressure will force the two scales out of
parallel.
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