Current methods of assessing gear-tooth load carrying capacity remain largely empirical; so also is lubrication technique. There is need for more research and more endeavour to apply it. The lecture states the quantities, definitions and notation employed in the analysis of contact conditions; outlines the phenomena of oil-film formation and friction; gives experimental values obtained by disc machines; and develops a modified treatment of temperature calculation. Phenomena encountered in practice are summarized, and the conclusion is reached that scuffing begins not within the oil film but by dislocation of the bounding surfaces. The emphasis throughout is on the problems which still await solution
GrubinA. N.1949Central Research Institute for Technology and Engineering, Moscow, Book No. 30, English Translation D.S.I.R.
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7.
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8.
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9.
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10.
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11.
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12.
ShotterB. A.1958Proc. Int. Conf. Gearing, Instn mech. Engrs, Lond., p. 120, ‘Experiments with a disc machine to determine the possible influence of surface finish on gear tooth performance’.
13.
ChestersA. I. M.1958Proc. Int. Conf. Gearing, Instn mech. Engrs, Lond., p. 91, ‘Study of the surface fatigue behaviour of gear materials with specimens of simple form’.
14.
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15.
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16.
For (1)-(15) see p. 152.
17.
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18.
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19.
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20.
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21.
CrookA. W.1961Phil. Trans., series A, vol. 254, p. 223.
22.
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23.
ShotterB. A.1961Engineer, Lond., 24th November.
24.
DarlingtonW. H.1956Trans. Inst. Mar. Engrs, September, ‘Some considerations of wear in marine gearing’.
25.
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28.
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29.
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30.
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31.
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32.
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33.
BlokH.1937Proc. Gen. Disc. Lubrication, Instn mech. Engrs, vol. 2, p. 14, ‘Measurement of temperature flashe, on gear teeth under extreme pressure conditions’.
