The specific grinding energy is very high, which will make temperature of the grinding zone raise up. So dry grinding is one of the most difficult machining processes. A new method was presented to reduce heat energy by special conditioning using a diamond dressing disc, for dressing of the CBN vitrified bond wheel, to make a step forward in pure dry grinding. The results show a drastic reduction in grinding forces is gotten with the same material removal rate compared to that of a normal process without conditioning, and no burning or workpiece surface damage are noted.