| Type | 
                         
                            Shaft nominal diameter 
                     | 
                
|---|---|
| 
                       
                      		 FF10 
                       | 
                    16 | 
| 
                       
                      		 FF12 
                       | 
                    16 | 
| 
                       
                      		 FF15 
                       | 
                    20 | 
| 
                       
                      		 FF20 
                       | 
                    25 | 
| 
                       
                      		 FF25 
                       | 
                    32 | 
| 
                       
                      		 FF30 
                       | 
                    40 |