Hardening, tempering, annealing and forging of steel; a treatise on the practical treatment and working of high and low grade steel .. . :240 HARDENING^ TEMPERING AND ANNEALING. Grinding Formed Cutters. Fig. 163 shows the table and long slide on the right of the col-umn, the dish-shaped wheel on the right-hand end of the spindle,the two arms by means of which the center of the cutter mavbe held below the top of the table and the tooth rest No. 5 whichengages with the heel of the tooth to be ground. Directions: Set the axis of the long slide at right angle tothat of the spindle by means of dial
Hardening, tempering, annealing and forging of steel; a treatise on the practical treatment and working of high and low grade steel .. . :240 HARDENING^ TEMPERING AND ANNEALING. Grinding Formed Cutters. Fig. 163 shows the table and long slide on the right of the col-umn, the dish-shaped wheel on the right-hand end of the spindle,the two arms by means of which the center of the cutter mavbe held below the top of the table and the tooth rest No. 5 whichengages with the heel of the tooth to be ground. Directions: Set the axis of the long slide at right angle tothat of the spindle by means of dial on column. Set the lower line. I^IG. 163.—GRINDING A FORMED CUTTER. •of centers so that it will intersect the vertical diameter at theside of the wheel. This adjustment can be readily made by bring-ing the point of the tail stock center nearly in line with the side ofa straight edge held vertically against the flat side of the the cutter on a mandrel between centers and set the face of atooth against the side of the wheel, making an allowance foramount to be ground off. To hold the face in this position, ad-just tooth rest No. 5 to the heel of the tooth. Determine the•depth of cut by short slide. GRINDING. 241 How to Grind a Worm Wheel Hob. Fig. 164 shows the long slide on the left of the column, thespecial attachment on the table for holding the mandrel, the disk-shape wheel No. 3 on the left-hand end of the spindle and thetable in line with the long slide. Directions: See those given for grinding formed cutters. Grinding a Hand 165 shows the long slide on the left, the cup-shape wheel
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