. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 14 THK: CJLKJLDJL LUMBERMAN September, 1895 BEARINGS AND JOURNALS. CAST iron makes one of the very best bearing sur- faces for a shaft if it is never allowed to lack for oil. But if it gets dry trouble is at hand. When a cast iron bearing gets dry it will do lots of mischief in a brief period of time. When it wants oil it wants it real bad, and it wants it right away ; if it does not get it it seizes and tears the journal with great intensity of desire, as it wer
. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 14 THK: CJLKJLDJL LUMBERMAN September, 1895 BEARINGS AND JOURNALS. CAST iron makes one of the very best bearing sur- faces for a shaft if it is never allowed to lack for oil. But if it gets dry trouble is at hand. When a cast iron bearing gets dry it will do lots of mischief in a brief period of time. When it wants oil it wants it real bad, and it wants it right away ; if it does not get it it seizes and tears the journal with great intensity of desire, as it were. This is particularly the case during the first few days of use. After considerable use, well supplied with oil, the surface becomes glazed and is not so likely to do damage from a little neglect in the way of oiling. Still the danger is there, modified in degree only. Cast iron bearings are not so much used as they would be but for this ever present danger. A well-known steam engine builder and mechanical engineer, when he put his now well-known steam engine on the market, several years ago, knowing the value of cast iron bearings, determined to overcome what he be- lieved to be a prejudice, and used it for main bearings and elsewhere about the engine. He was forced to give it up after a year or so of trial, proper attention not in many cases being given to oiling, with the stereotyped results. When cast iron is used for a bearing the box should be made so as to cut off not less than Yt of an inch from each end in squaring up, as the ends are likely to be chilled a little in the mould, and unless cutoff for a little distance in there will be a narrow ring of metal that is harder than the rest of the bearing surface, and the jour- nal will be cut. For a similar reason a liberal allowance should be made for boring. Generally speaking, the bearing and journal should not be made of the same material, although this may sometimes be unavoidable. Cast iron appears to be about the o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
