Hardening, tempering, annealing and forging of steel; a treatise on the practical treatment and working of high and low grade steel .. . h^U^ U FIG. 147.—SHAPES AND SIZES OF EMERY WHEELS TO USE FOR TOOL GRINDING. GRINDING. 229. ?^la. 148.—SAMPLES OP GROUND WORK DONB IN TJNnrERSAL CUTTERAND TOOL GRINDER, FIG. 146. 230 HARDENING^ TEMPERING AND ANNEALING. The side teeth of angular and side milling cutters are groundoff with practically a straight line clearance. This is done with acup-shape emery wheel 3 inches in diameter on the left side ofthe machine. The advantages of grinding side teeth with
Hardening, tempering, annealing and forging of steel; a treatise on the practical treatment and working of high and low grade steel .. . h^U^ U FIG. 147.—SHAPES AND SIZES OF EMERY WHEELS TO USE FOR TOOL GRINDING. GRINDING. 229. ?^la. 148.—SAMPLES OP GROUND WORK DONB IN TJNnrERSAL CUTTERAND TOOL GRINDER, FIG. 146. 230 HARDENING^ TEMPERING AND ANNEALING. The side teeth of angular and side milling cutters are groundoff with practically a straight line clearance. This is done with acup-shape emery wheel 3 inches in diameter on the left side ofthe machine. The advantages of grinding side teeth with a fairsize emery wheel, and at the same time grinding a straight lineclearance with an accompanying strong cutting edge, are knownto those who have heretofore been compelled to use a small wheelgrinding a hollow clearance and weak-cutting edge. (See ) To prevent the drawing of the temper from cutting edges ofside mills and the side teeth of angular cutters, etc., which have a
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