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Forging CHAPTER VI TWISTS, SPIRALS, ETC. TO relieve the monotony of plain surfaces square and flat bars of iron are sometimes twisted, and many pleasing effects are thus obtained. It requires a trained eye to determine the Fig. 44- Twisting a Bar proper spacing of the twists. They should be of uniform distances apart in order to appear the best. There are many shapes that may be twisted to advantage, such as square, flat and hexagon, and round bars with two or more twisted together; also bars that are tapered and swelled. All of these are very pleasing. 77 |
Hand Forging by Thomas F. Googerty