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Serving the Metal-Cutting Industry for Five Decades.RESHARPENING ROUGHING <strong>END</strong> <strong>MILLS</strong>Roughers are sharpened by grinding the radial rake faceand fillet of the flute on a tool and cutter grindingmachine using a saucer shaped grinding wheel. Dress thewheel to match the form of the flute face from the ODto the fillet. The grinding head should be turned to anangle slightly greater than the helix angle of the end mill(1° to 3° extra). This allows the leading edge of the wheelto hollow grind the rake face. Typically, the finished hookmeasures 8° to 12° (Figure 1).A tooth support finger is required to insure that properlead is maintained. For this type of roughing cutter,the support finger rests on the back of the tooth beingsharpened, located below the form (Figure 2).It is important to remove the entire wear land whensharpening tools. The tool can be spun-ground on theperiphery to establish a guide for the amount of ODmetal to be removed. Regrinding can generate considerableheat and care should be taken not to burn thecutting edge.FACE OF<strong>END</strong> MILLFigure 1TOOTH RESTFINGER8" TO 12"HOOKFigure 2SAUCERTYPEWHEELSTOCKREMOVEDFROM FACETOOTHRESTFINGERTECHNICAL PAGESFor technical support and questions about you machining requirements, please call us at 1-800-682-8832102
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