Traducción

Grinding a round nosed turning tool for general machine work
The illustrations on this page, figs. 11 to 15, inclusive, show each step in the grinding of a round nosed turning tool for generalmachine work. The various steps in grinding the cutter bit are as follows:
Fig. 11- Grind the left side of the cutter bit, holding the cutter bit at the correct angle against the wheel to form the sideclearance, as shown in fig. 20 on page 7. Use a coarse grinding wheel to remove most of the metal, and then finish on the side of the fine grinding wheel to produce a straight surface. (if ground on theperiphery of a small diameter wheel the cutting edge will be undercut and will not have the correct angle.) Dip the cutter bit into water frequently while grinding to prevent overheating.
Fig. 12-Grind the right side of the cutter bit, holding at the required angle to form the right side. This angle is not important as it has very little to do with the cutting edge of the tool, except too muchof the bit should not be removed, as the more metal left on the bit the better it absorbs the heat.
Fig. 13- Grind the radius or rounding on the end of the cutter bit. A small radius (approximated1/32´´) is preferable as a large radius may cause chatter. Hold the cutter bit lightly against the side of the wheel and turn from side to side to produce the desired radius. Be careful to hold thecutter bit at the correct angle to obtain the proper front clearance, as shown in Fig. 14 and also Fig. 21 on page 7.
Fig. 14-Hold the cutter bit at an angle as shown while grinding the radius on the endof the cutter bit in order to form the required front clearance. See Fig.21 on page 7.
Fig.15-Grind the top of the cutter bit, holding the cutter bit at the required angle to obtain the necessaryside rake and back rake, as shown in Figs.20 and 21 on page 7.
Be careful not to get the tool too hot-dip tool in cold water occasionally to avoid burning.
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