GROOVING / CUTTING OFF GROOVING / CUTTING OFF MACHINING RECOMMENDATIONS Notes for cutting off feed Distance from the cutting edgeto the workpiece centera When the cutting edge approaches the center, reduce the feed by 50%. a If necessary, stop the feed prior to reaching the center of the workpiece. The part will fall off because of its own weight. Feed f Distance a Revolution Distance from the cutting edgeto the workpiece centera When using constant cutting speed during a cutting off cycle, it is F recommended to limit the spindle speed to 80% of maximum to ensure stability. a To prevent the workpiece from being expelled, lower the spindle speed before finishing the grooving operation. Maximum spindle speed Revolution nmax-n start-n Distance a insert Neutral insert Handed insert Neutral insert Handed insert a When there is a center stub on solid bar work or burrs are formed on pipe material, it is possible to decrease them by using a handed insert. With a handed insert, machining tends to be less stable when compared to using a neutral insert. Pay special attention to avoid fracturing of the cutting edge and decrease the feed when necessary. F214