Benjamin, Charles Henry, 1856- [from old catalog], Hoffman, James David, 1868- [from old catalog] joint author · New York, H. Holt and company · leaf 173
less than25 degrees to avoid sticking of the ball. To convert the bearing just shown to four-point contact, itwould only be necessary to change the one cone into two conestangent to the ball at c and d. To reduce it to two-point contact the points a and b arebrought together to a point opposite p.… … 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…
Machine design
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