An empirical wear equation is proposed for predicting material losses of asbestos-reinforced polymers caused by sliding against metal surfaces. The equation has been tested with four different kinds of friction pairs and found to correlate extremely well with the experimental results. The wear equation is in the form of ΔW = KFaVbtc, where ΔW is the weight lost, K the wear factor, F the load, V the velocity, t the time of sliding, and a, b and c one set of parameters.