Benjamin, Charles Henry, 1856- [from old catalog], Hoffman, James David, 1868- [from old catalog] joint author · New York, H. Holt and company · leaf 311
different types in use, two of thevery common ones are shown in Figs. 141 and 142, the formerbeing used in the smaller machines. The chief objection to the 280 MACHINE DESIGN bronze block is its liability to wear unevenly thus causing lostmotion and an irregular movement of the block while… … Fig. 141. block may be obtained from the crushing strength of the steelcasting. If this value be taken at 90,000 lb. per square inchwith a factor of safety of 6, the projected area of this bearingwill be 129,591-i-15,000 = 8.6 sq. in., from which, if the length of the cam be 4 in., the breadth of…
Machine design
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