Canadian machinery and metalworking (July-December 1917) . 22 objectionable feature of grinding edgetools is further emphasized if the wheeldoes not cut freely and undue pressureis required to accomplish the desiredpurpose. K— P-. C AN AD I AN MACHINERY ance. With the edge above the center,an unobserving or careless workmanwould have the disposition to force thetool on the smaller diameter, causing itto take the cut in jumps, which oftendestroys the align-ment of the shaftor results in thebreaking off of theportion being cut. A parting toolmay have every ap-pearance of beingcorrectly groundwit
Canadian machinery and metalworking (July-December 1917) . 22 objectionable feature of grinding edgetools is further emphasized if the wheeldoes not cut freely and undue pressureis required to accomplish the desiredpurpose. K— P-. C AN AD I AN MACHINERY ance. With the edge above the center,an unobserving or careless workmanwould have the disposition to force thetool on the smaller diameter, causing itto take the cut in jumps, which oftendestroys the align-ment of the shaftor results in thebreaking off of theportion being cut. A parting toolmay have every ap-pearance of beingcorrectly groundwith the cuttingedge on the centre,and yet be of littleuse for effective work ifclearanceof it)with the the side(or lackinterferesoperation FIG. 8. Correct Setting NecessaryAccurate grinding of tools may beconsidered to be one of the essential fac-tors in the metal cutting problem, butthe efficiency of good grinding may cometo naught if it is not followed by experi-enced judgment on the part of those whoset the tools for the actual performanceof the work. Even the scientific grind-ing to recognized shapes by an experttool grinder will not compensate for thedestruction of the tool through faultysetting of same. In the hands of
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmachinery, bookyear19
