Model Number    QJF10/530X1                    Original  
Number of Row Double                                 Type Four Points Contact Ball Bearing      
Bore  d（mm）   530                                      Outer   D（mm）780     
Width  B（mm）    112                                   Mass W（kg）   195  
Overall Width  T（mm）                                 Chamfer（Rmin）     
rotate speed（r/min）