... Fig. 9 Ring-on-ring RCF testing apparatus. See Table 1. Fig. 10 Four-bearing RCF testing apparatus. See Table 1. Wear, Wear, Vol 74, 19 8 1- 1 982, p 13 1- 1 42 15 . T. Sugita, K. Suzuki, and Y. Nakata, ... Repeated Impact-Abrasion of Ore-Crushing Hammers, Wear, Vol 87, 19 83, p 20 7-2 25 18 . R.G. Bayer, Impact Wear of Elastomers, Wear, Vol 11 2, 19 86, p 10 5 -1 20 19 . P.A. Engel and D.L. Millis, ... Mechanical Engineers, E.A. Avallone and T. Baumeister III, Ed., 9th ed., McGraw-Hill, 19 87, p 8 -1 10 to 8 -1 11 Impact Wear Peter A. Engel, Department of Mechanical and Industrial Engineering, State...