Memo:
The bearing has such outer ring as is made of special steel strip and is compressed and then
pushed into the shell hole, which is applicable to the supporting components with restricted
radial dimension while not requiring high rotating accuracy and the components with cast iron
shells which do not require high machining precision of mating holes. And it is required that
the surface hardness of the neck cooperating with the bearing should not be lower than
HRC45 and that the surface roughness (Ra) should not be more than 0.63μm