Model Number     4044D                                Original  
Number of Row  Double                                 Type  Angular Contact Ball Bearing     
Bore  d（mm）  220                                       Outer   D（mm）   340  
Width  B（mm）    118                                    Mass W（kg）   18.5  
Overall Width  T（mm）                                 Chamfer（Rmin）     
rotate speed（r/min）