b'J. SaundersThe setup is shown for a Tormach 1100MX CNC mill. A steel workpiece (inset) is shown after full-diameter slotting.tive-style machining strategies withwith the 12.7 mm DOC. This im- slot along one axis is very different thin radial engagement, also knownprovement minimizes re-cutting offrom a 508 mm (20") slot around the as dynamic or high-speed machin- chips and enables coolant to moreprofile of a part that involves x- and ing, but additional points tack oneasily flush chips, reducing heaty-axis movement.tool pressure. Too many points ofbuildup and lubricating the cut. Consider recipe 551 for drilling contact can increase pressure to theCautionmustbeexercisedand tapping machines, Bridgeport-level of causing chatter. With a light- when testing slotting recipes assize machines or even old verti-duty machine, reducing points ofthe length of the overall slot andcal machining centers that may not contact helps minimize the amountchanges in slot direction affect thebenefit from the higher rpm com-of rigidity required for a stable, chat- ability of coolant to access the cut.mon with modern machine tools. A ter-free cut. Any changes in a coolants aim canlarger machine tool with more rigid-The 6.35 mm DOC offered supe- lead to tool failure and breakageity or power may yield different re-rior chip evacuation when compared often quickly. A 102 mm (4") testsults.CTEctemag.com/cteguide.com19ShopOps.indd 19 5/14/20 12:30 PM'