Benjamin, Charles H[enry], 1856- [from old catalog] · New York, H. Holt and company · leaf 146
is shown in the figure, the principlebeing the same as in Fig. 51. By comparing the letter-ing of the two figures the similarity will be readily seen. This last bearing maybe converted to four pointcontact by making the uppercollar of the same shape asthe lower. To guide theballs in two point… … the advantage of making each 122 MACHINE DESIGN. ball move in a path of different radius thus securingmore even wear for the plates. 60. Materials and Wear. The balls themselves arealways made of steel, hardened in oil, tempered andground. They are usually accurate to within one tenthousandth of an…
Machine design
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