Who can help me translate this esay? WHEEL WEAR Wheel wear is most important in grinding operations and can vary considerably according to the cutting conditions. Very rapid wheel wear is usually a result of too soft a wheel grade being used, but it can also be due to the combination of work speed, traverse and depth of cut being too great. Because of the high degree of accuracy that grinding operations are often required to achieve, the amount of wear that takes place during the operation can be troublesome. This is particularly true to form grinding where the shape of the wheel profile is critical. The way in which the wheel wear takes place can sometimes have a more serious effect than the actual rate of wear. This can be appreciated by studying the effects of longitudinal-feed rate in cylindrical grinding, and the cross-feed rate in surface grinding. It is usual to control the feed rate in a grinding operation according to the width of the wheel face. Obviously the feed cannot exceed the width of the face, otherwise steps would appear in the surface of the work. The feed rate has therefore to be some proportion of the wheel width.