Where conditions permit the use of carbide reamers,the speeds may often be increased over those recommended for HSS (hight-speed steel)reamer. The limiting factor is usually an absence of rigidity in the setup. Any chatter,which is often caused by too high a speed, is likely to chip the cutting edges of a carbide reamer. Always select a speed that is slow enough to eliminate chatter. Close tolerances and fine finishes often require the use of considerably lower bspeeds than than those recommended in Table H-5.