American Blacksmithing, toolsmiths' and steelworkers' manual . s who try to sharpen their own shares by hammer-ing them when cold.) Shares to be used in stony land TOOLSMITH AND STEELWORKER 161 should not be drawn out so thin as those which are usedin sandy or land that is free from stones. To harden a plowshare, heat the extreme cuttingedge to a low cherry red (or just enough to harden) thefull length of the share by moving back and forththrough the fire, then plunge into clean cold waterpoint first and in a vertical position. A plowsharesharpened and hardened after these directions willgive
American Blacksmithing, toolsmiths' and steelworkers' manual . s who try to sharpen their own shares by hammer-ing them when cold.) Shares to be used in stony land TOOLSMITH AND STEELWORKER 161 should not be drawn out so thin as those which are usedin sandy or land that is free from stones. To harden a plowshare, heat the extreme cuttingedge to a low cherry red (or just enough to harden) thefull length of the share by moving back and forththrough the fire, then plunge into clean cold waterpoint first and in a vertical position. A plowsharesharpened and hardened after these directions willgive unlimited satisfaction. But although the instruc-tions given in hardening will prove most successfulwhen it can be accomplished, there are times when ashare cannot be hardened the whole length of the cut-ting edge in the blacksmiths fire. This will apply tovery large and long shares, so when hardening verylong shares do not try to harden the whole cuttingedge, but harden only the point of the share from a tob, as illustrated in Fig. 92, a long share hardened. C Fig. 92. An ordinary plowshare. after these directions will give good results if thewhole cutting edge has been forged and hammeredafter the instructions formerly mentioned. When sharpening plowshares in order that they willgive good results and cause the plow to run level,make the point a little rounding, as marked c, Fig. 92,otherwise if made square it would gather up long 162 THE TWENTIETH CENTURY grass and cause the plow to run out of the have the cutting edge in a straight line fromthe wing d to the point a, so that if placed on a levelfloor the cutting edge would come in contact and restevenly on the floor, the entire length of the for breaking plows are made with a verysharp point as illustrated by dotted lines in figure. How to Make Square Holes in Plowshares. A great many blacksmiths when making plowshareshave more or less trouble to make proper shaped holes,in order that the bolthea
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