000 rpm where the normal speed would be 6 000 rpm this in turn results in the availability of more power at the cutting face of the grinding machine which makes it possible to increase the linear feed rate in addition because the method of deposition can be controlled to produce a layer of uniform thickness within the tolerances allowed for most grinding applications the coated wheels can be used without further trueing or conditioning the following examples illustrate the improvements observed in a comparison of coated versus uncoated cbn wheels performed to illustrate the coated wheel 39 s ability to grind at higher linear feed rates than permissible at a given speed for uncoated wheels the coated wheel machined 192 parts to specification before showing wear performed to illustrate the coated wheel 39 s greater life when compared to an uncoated wheel under the same operating conditions the coated wheel machined 213 parts to specification before showing wear performed to illustrate the coated wheel 39 s greater life when compared to an uncoated wheel under the same operating conditions the coated wheel machined 163 parts to specification before showing wear performed to illustrate the coated wheel 39 s greater.