A gauging device for measuring {HEAD ~ the accuracy} of the rate of taper of a tapered, arcuate brake block at {TAIL ~ a first measuring point} and a second measuring point comprising: 
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A gauging device for measuring { HEAD ~ the accuracy } of the rate of taper of a tapered , arcuate brake block at { TAIL ~ a first measuring point } and a second measuring point comprising :
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH