Estimate the radial wear in a nylon bushing supporting a 10-mm-diameter shaft running at 900 rpm for 1,000 hr under a load, P = 0.5.MN/m 2 (70 psi) based on projected area. Nylon's wear factor, k = 4.010 10- 15 m3/N-m, and sliding distance, D = 1.70 10 5 m, gives a wear depth, h = 3.4 mm. Should this amount of wear be unacceptable, filled nylon (k = 0.24) reduces wear depth to 0.2 mm.