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