US 6,981,325 B2 | ||
Double row ball bearing | ||
Shuichi Yano, Kanagawa (Japan) | ||
Assigned to NSK Ltd., Tokyo (Japan) | ||
Filed on Oct. 09, 2003, as Appl. No. 10/681,112. | ||
Application 10/681112 is a division of application No. 09/557661, filed on Apr. 25, 2000, abandoned. | ||
Claims priority of application No. P. 11-124507 (JP), filed on Apr. 30, 1999. | ||
Prior Publication US 2004/0068872 A1, Apr. 15, 2004 | ||
Int. Cl. B21D 53/10 (2006.01); B21K 1/40 (2006.01) |
U.S. Cl. 29—898.062 | 1 Claim |
1. A method of manufacturing a double row ball bearing, the double row ball bearing including an inner race defining first
and second inner race raceways respectively formed on an outer peripheral surface thereof, and an outer race defining first
and second outer race raceways respectively formed on an inner peripheral surface thereof and corresponding to the first and
second inner race raceways of the inner race to define first and second raceways for holding a first ball row and a second
ball row, respectively, comprising:
fitting a first ball row including a plurality of balls into the first raceway before the outer race is mounted onto the inner
race;
inserting a first retainer into the first raceway together with the first ball row;
mounting the outer race to the inner race to form the first and second raceways respectively defined between the inner race
and the outer race by the mutually corresponding inner race raceways and outer race raceways of the inner race and the outer
race;
inclining the axes of the inner race and inner outer race with respect to each other, so that the maximum value of a first
clearance between a ball-fitting-direction rearward side edge portion of the second inner race raceway of the inner race forming
the second raceway and a ball-fitting-direction rearward side edge portion of the second outer race raceway of the outer race
forming the second raceway is larger than an outer diameter of each ball of the second ball row, and the maximum value of
a second clearance between a ball-fitting-direction forward side edge portion of the second inner race raceway of the inner
race forming the second raceway and a ball-fitting-direction forward side edge portion of the second outer race raceway of
the outer race forming the second raceway is smaller than the outer diameter of each ball of the second ball row,
fitting the second ball row including a plurality of balls into the second raceway after the outer race and inner race are
mounted and inclined with respect to each other; and
inserting a second retainer into the second raceway together with the second ball rows,
wherein, during the fitting of the second ball row with the plurality of balls into the second raceway, the outer race is
held so as to extend in a vertical direction.
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