Part Number | 
                            
                              d - Bore | 
                            
                              D - Outer Diameter | 
                            
                              B - Width | 
                           
                            
                              Bearing Type |  
                          
|---|---|---|---|---|
| D/W RW1810 R | 7.938 mm | 12.7 mm | 4.762 mm | Deep groove ball bearing | 
| W 619/8 | 8 mm | 19 mm | 6 mm | Deep groove ball bearing | 
| W 608 R | 8 mm | 22 mm | 7 mm | Deep groove ball bearing | 
| 618/8 | 8 mm | 16 mm | 4 mm | Deep groove ball bearing | 
| W 628/8 R-2RS1 | 8 mm | 16 mm | 5 mm | Deep groove ball bearing | 
| W 608-2RZ | 8 mm | 22 mm | 7 mm | Deep groove ball bearing | 
| W 628/8-2RZ | 8 mm | 16 mm | 5 mm | Deep groove ball bearing | 
| W 618/8-2Z | 8 mm | 16 mm | 4 mm | Deep groove ball bearing | 
| W 638/8-2Z | 8 mm | 16 mm | 6 mm | Deep groove ball bearing | 
| W 628/8 R-2Z | 8 mm | 16 mm | 5 mm | Deep groove ball bearing | 
| 607/8-2Z | 8 mm | 19 mm | 6 mm | Deep groove ball bearing | 
| 608-RSH | 8 mm | 22 mm | 7 mm | Deep groove ball bearing | 
| 608-RSL | 8 mm | 22 mm | 7 mm | Deep groove ball bearing | 
| 638-2RZ | 8 mm | 28 mm | 9 mm | Deep groove ball bearing | 
| W 618/8 | 8 mm | 16 mm | 4 mm | Deep groove ball bearing | 
| 619/8 | 8 mm | 19 mm | 6 mm | Deep groove ball bearing | 
| W 637/8 XR | 8 mm | 14 mm | 3.5 mm | Deep groove ball bearing | 
| W 628/8-2RS1 | 8 mm | 16 mm | 5 mm | Deep groove ball bearing | 
| W 617/8 R | 8 mm | 12 mm | 2.5 mm | Deep groove ball bearing | 
| W 608-2RS1/VP311 | 8 mm | 22 mm | 7 mm | Deep groove ball bearing |