CSI-77 (Block-on-Ring Wear Tester )
The apparatus includes:

Digital RPM Display, unidirectional
Speed control range from 80 to 100 RPM
Digital predetermined cycle counter with cutoff
Digital predetermined timer
Temperature control via electric heaters: ambient to 400 deg. F
Oil reservoir with cover
Dead weights for load from: 90 to 270lbs. (load arm ratio 10:1)
Digital display of friction force continuously monitored.
Overload shutoff circuit built-in.
Continuous display dial indicator for wear 0.0001" resolution

Option:
Temperature probe for test blocks with shut off device to terminals test at preset temperature

Reference:
ASTM G 77