Results 251 to 260 of about 384,224 (306)
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American Journal of Ophthalmology, 1978
We obtained steel test balls for keratometer calibration at nominal cost by using a selected set of steel ball bearings, readily available for nonoptical purposes. The set of keratometer tests balls each have an accuracy of greater than one part in 1,000.
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We obtained steel test balls for keratometer calibration at nominal cost by using a selected set of steel ball bearings, readily available for nonoptical purposes. The set of keratometer tests balls each have an accuracy of greater than one part in 1,000.
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The Correct “Ball Bearings” Data
Lifetime Data Analysis, 2002The famous data on fatigue failure times of ball bearings have been quoted incorrectly from Lieblein and Zelen's original paper. The correct data include censored values, as well as non-fatigue failures that must be handled appropriately. They could be described by a mixture of Weibull distributions, corresponding to different modes of failure.
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IEE Proceedings A Science, Measurement and Technology, 1993
Two different ball-bearing motors have been investigated. The experimental results do not agree with the prevailing electromagnetic theories of ball-bearing motor operation. The results suggest that the driving force arises from an electromagnetic interaction between the ball race and the surface of the ball in the region of their contact point.
D.B. Watson, M.R. Williams, C.S. Crimp
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Two different ball-bearing motors have been investigated. The experimental results do not agree with the prevailing electromagnetic theories of ball-bearing motor operation. The results suggest that the driving force arises from an electromagnetic interaction between the ball race and the surface of the ball in the region of their contact point.
D.B. Watson, M.R. Williams, C.S. Crimp
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Wear, 1970
Abstract Misalignment of rolling bearings is a form of abuse which can produce adverse conditions and shorten bearing life. The basic aspects and causes of misalignment are considered along with its effects and diagnosis. Guide lines are given to assist minimising the problems that occur.
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Abstract Misalignment of rolling bearings is a form of abuse which can produce adverse conditions and shorten bearing life. The basic aspects and causes of misalignment are considered along with its effects and diagnosis. Guide lines are given to assist minimising the problems that occur.
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Journal of Fluids Engineering, 1948
Abstract From personal experience the author gives examples of progress made in reducing friction in sliding movements to a minimum, with the addition of preloading of the slide mechanism, so that higher operating speeds, greater precision of product, and longer life at lower cost are possible.
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Abstract From personal experience the author gives examples of progress made in reducing friction in sliding movements to a minimum, with the addition of preloading of the slide mechanism, so that higher operating speeds, greater precision of product, and longer life at lower cost are possible.
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IEEE Transactions on Magnetics, 1997
We discuss and clarify a number of very serious mistakes and misunderstandings concerning the mechanism of the ball bearing motor. Specifically we show that Gruenberg's mechanism, which is equivalent to the phenomenological model of Watson, Williams, and Crimp (1993), does not explain the ball bearing motor behavior at all, because the predicted total ...
P.G. Moyssides, P. Hatzikonstantinou
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We discuss and clarify a number of very serious mistakes and misunderstandings concerning the mechanism of the ball bearing motor. Specifically we show that Gruenberg's mechanism, which is equivalent to the phenomenological model of Watson, Williams, and Crimp (1993), does not explain the ball bearing motor behavior at all, because the predicted total ...
P.G. Moyssides, P. Hatzikonstantinou
openaire +1 more source