Car lubrication

Paperback | July 9, 2012

byWillis Edward Hall

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ...a journal in an efficient manner is now more than in the experimental stage. We may except the so-called roller bearings, which have been tried with more or less satisfaction in an experimental way. The theoretical advantage arising by resolving the friction from that of sliding to that of rolling would appear to be a large gain; and yet from the experiments of Wellington (see Proceedings of American Society of Civil Engineers) it would appear this advantage is indicated only during starting, but is not so large a percentage gain after the velocity is increased. Roller bearings have been known to run successfully for 100,-ooo miles, but it is not known that they have been subjected, by a more general introduction, to an extensive trial to determine their mechanical efficiency, such as wear and tear and comparison with bearing metal. The results of Tower's experiments, previously referred to, give a close idea as to what is to be expected of the different methods of lubrication. It was found with three (3) methods of lubricating journals, feeding the oil from below and from above the journal, that the following ratios of their efficiencies may be expected: Method.Actual Load. Poundspersq. inch.Coefficient of Friction.Comparative Friction. Oil Bath262o 00139 220.009807 06 272o 009006 48 The siphon lubricator was placed on the top of the bearing. The tests were under the same conditions. Rape-seed oil used. Journal, 4 inches diameter, running at a speed of 150 revolutions per minute. Temperature 100 degrees (Fahr.). There can be no question, then, as to their relative efficiencies. The oil-bath method has had numerous trials upon car journals, but has always proved a failure from the difficulty of obtaining a mechanical means that would retain a...

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From the Publisher

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ...a journal in an efficient manner is now more than in the experimental stage. We may except the so-called roller bearing...

Format:PaperbackDimensions:18 pages, 9.69 × 7.44 × 0.04 inPublished:July 9, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217821650

ISBN - 13:9780217821650

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