The boy craftsman; practical ad profitable ideas for a boy's leisure hours . Fig. 34.—Grinding the Chisel. flatly, and bear down upon the blade with your left the grinding until the bright line of the dulledge has disappeared and an invisible edge has beenobtained. Stop when this point is reached or the edgewill become feathery and break off, necessitating regrind-ing. Grind upon the bevelled edge only, and hold the toolin the same relative position, to prevent the bevel frombecoming rounded. The angle of the bevel should be THE PROPER HANDLING OF TOOLS 39 about twenty-five degre
The boy craftsman; practical ad profitable ideas for a boy's leisure hours . Fig. 34.—Grinding the Chisel. flatly, and bear down upon the blade with your left the grinding until the bright line of the dulledge has disappeared and an invisible edge has beenobtained. Stop when this point is reached or the edgewill become feathery and break off, necessitating regrind-ing. Grind upon the bevelled edge only, and hold the toolin the same relative position, to prevent the bevel frombecoming rounded. The angle of the bevel should be THE PROPER HANDLING OF TOOLS 39 about twenty-five degrees. To keep this angle the same,it is desirable to have a rest, consisting of a board nailedto the frame of the stone, upon which to support thehandle of the chisel. Gouges and Draw-knives are ground similarly, theformer being rocked from side to side, in order togrind the curved bevel uniformly. Plane-irons are held with both hands, as shown inFig. 35, and ground the same, except that the corners. Fig. 35. — Grinding the Plane-iron. of the smoothing- and fore-plane irons are slightlyrounded, while the edge of the jack-plane iron is alittle higher at the corners than in the centre, to giveit the qualities for removing thick shavings. It is moredifficult to keep the line between the bevel and upperpart of the iron straight than in grinding chisels, onaccount of the wider blade. 40 PROFITABLE PASTIMES Knives and Hatchets are ground upon both sides of theblade. Of course, the edge of a tool is left in a very roughcondition by the grind-stone, and must be rubbed upon an oil-stone before it is fit to cut with. There are many makes of whetstones, many goodones and many worthless ones. Above all things, dont
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