A gauge for measuring the rate of taper and the radius of {HEAD ~ the inside surface} of a tapered, arcuate brake block has a base plate which pivotally mounts a swing arm with an indicator for visually reading the variation of the radius of the internal surface from {TAIL ~ a specified radius} 
A gauge for measuring the rate of taper and the radius of { HEAD ~ the inside surface } of a tapered , arcuate brake block has a base plate which pivotally mounts a swing arm with an indicator for visually reading the variation of the radius of the internal surface from { TAIL ~ a specified radius }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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