Designation
                
                With shiled :687
	                
                
                Open type :687ZZ1
	                
                
                With seal VV :687VV
	                
                
                With seal DD :687DD
	                
                
                Principal dimensions(mm)
                
                d :7
	                
                
                D :14
	                
                
                B :3.5
	                
                
                B1 :5
	                
                
                r(min) :0.15
	                
                
                Basic load ratings(N)
                
                Cr :1170
	                
                
                Cor :510
	                
                
                Basic load ratings{kgf} 
                
                Cr :120
	                
                
                Cor :52
	                
                
                Speed ratings(rpm)  
                
                Grease
                
                ZZ :40000
	                
                
                D·D :34000
	                
                
                Oil 
                
                Z :45000
	                
                
                Abutment and fillet dimensions (mm)
                
                da(min) :8.2
	                
                
                db(max) :8.5
	                
                
                Da(Max) :12.8
	                
                
                Db(min) :12.7
	                
                
                ra(max) :0.15
	                
                
                rb(max) :0.15
	                
                
                Weight(g) 
                
                Open type :2.13
	                
                
                With shiled :2.97