Benjamin, Charles Henry, 1856- [from old catalog], Hoffman, James David, 1868- [from old catalog] joint author · New York, H. Holt and company · leaf 174
BALL BEARINGS 155 73. Step-bearings.—The same principles apply as in the pre-ceding article and the axis and points of contact may be variedin the same way. The most common form of step-bearing con-sists of two flat circular plates separated by one or more rings ofballs. Each ring must be kept in… … Fig. 66. Fig. 67. friction. This is a bearing with two-point contact and the ballsturning on horizontal axes. If the space between the plates isfilled with loose balls, as is sometimes done, the rubbing of theballs against each other will cause considerable friction. To guide the balls without…
Machine design
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