Rotavator is energy and time efficient equipment but due to rapid wear of blades, it becomes restrictive to the use by the farmers. There is loss in weight, reduction in width and thickness of worn out rotavator blades. On the basis of identified wear pattern, the hard surfacing with metal alloy powders viz. EWAC 1002ET (Tungsten Carbide base) (T1), EWAC 1001EB (Nickel base) (72), FRIXTEC 19850 (Bronze base) (T3) and LUBROTEC 19985 (T4) was done by Oxy-acetylene thermal spraying technique on local blades. Differential front hard surfacing (T5) and back hard surfacing (T6) with EWAC 1002 ET metal alloy powder was also done in this study. The blades were tested in field for 200h continuously. The data of wear was compared with the wear of Howard blades. Local blade was considered qs control (T7). The study showed that the cutting edge of L-shaped rotavator blade section was most susceptible to wear and was decreased with increased operational hours. Statistically, the gravimetric and dimensional wears differ significantly with respect to treatment, working period, width and thickness of blades. Maximum expected life of 456 h was obtained in treatment T1, followed by T2 (332 h), T5 (261 h), T6 (260 h), T4 (264 h), T3 (239 h) and T8 (204 h) by extrapolating hr the maximum weight loss in control treatment (T7) which had a life of 200 h, The cost of treatment T1, T2, T3, T4, T5, T6 and T8 were 69.80, 97.33, 89.93, 89.93, 90.50, 89.93 and 130.00 percent of the cost of treatment T7.
