Fig. 39 order to produce a straight flat surface, but in practicethis is not the case. So for these irons the cornersshould be slightly rounded, or, what is better, be slightlycurved, but the radius of the curve should be muchlarger than for the jack-plane iron. Fig. 39 shows the iron jack-plane,… … Fig. 40 is to smooth end grain. The angle at which the iron is setin this plane is much smaller than that of other planes.This being the case, the iron, which is always a single APPENDIX 193 one, is inverted. If if were not, the angle of the cuttingwedge would have to be so small that it would not…
Patternmaking
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