RING GAUGES
Ring
gauges are mainly used for checking the diameter of shafts having a central
hole.
The hole is accurately finished by grinding and lapping after taking
hardening process.
The
periphery of the ring is knurled to give more grips while handling the gauges.
We have to make two ring gauges separately to check the shaft such as GO ring
gauge and NOGO ring gauge.
But
the hole of GO ring gauge is made to the upper limit size of the shaft and NOGO
for the lower limit.
While checking the shaft, the GO ring
gauge will pass through the shaft and NOGO will not pass.
To identify the NOGO ring gauges
easily, a red mark or a small groove cut on its periphery.
