The performance of sliding contacts, for example the contact between a brush and commutator, is intimately connected with friction and wear. Therefore Part III must not only deal with the electrical proporties of sliding contacts but also with the phenomena of friction and wear. The text and also the literature index can be shortened by reference to the informative book1 Bowden and Tabor . But, we are inclined to look at some fundamentals in a special manner as shall be shown in the following.
KeywordsShear Strength Friction Force Contact Spot Calcium Stearate Lubricant Molecule
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