TourTour specific wear rate PIN ON RING
Input of scar width and ring radius
 ring radius r 10-3 m
 semi scar width b 10-3 m
 scar length L 10-3 m
 load F N
 sliding distance s m
 
 scar depth h = r - (r2 - b2) 10-6 m3
 wear volume V 10-12 m3
 specific wear rate k = V / Fs 10-15 m2/N
  Calculator with input of scar depth h and semi width b
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