everything from skateboards to aircraft.
Their popularity is due to their ability to handle moderate to high speeds
with moderate
radial and axial loading. Though its load carrying capacity is not as high
as its roller bearing counterparts, it makes up for this by compensating for
misalignment. An all-around performer, their high
production numbers keep the pricing low.
History:
The
Conrad style ball bearing is named after its inventor, Robert
Conrad, who was awarded British patent 12,206 in 1903 and U.S.
patent 822,723 in 1906.
Design:
A Conrad bearing is assembled by placing
the inner race into an eccentric position relative to the outer
race, with the two races in contact at one point, resulting in a
large gap opposite the point of contact. The balls are inserted
via this gap and then evenly distributed around the bearing
assembly, causing the races to become concentric. Assembly is
completed by fitting a cage to the balls to maintain their
positions relative to each other. Absent the cage, the balls
would eventually drift out of position during operation, causing
the bearing to fail. The cage carries no load and serves only to
maintain ball position.
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