Designation
                
                With shiled :639
	                
                
                Open type :639ZZ
	                
                
                With seal VV :639VV
	                
                
                With seal DD :-
	                
                
                Principal dimensions(mm)
                
                d :9
	                
                
                D :30
	                
                
                B :10
	                
                
                B1 :10
	                
                
                r(min) :0.6
	                
                
                Basic load ratings(N)
                
                Cr :5100
	                
                
                Cor :2390
	                
                
                Basic load ratings{kgf} 
                
                Cr :520
	                
                
                Cor :244
	                
                
                Speed ratings(rpm)  
                
                Grease
                
                ZZ :24000
	                
                
                D·D :-
	                
                
                Oil 
                
                Z :30000
	                
                
                Abutment and fillet dimensions (mm)
                
                da(min) :13
	                
                
                db(max) :16.1
	                
                
                Da(Max) :26
	                
                
                Db(min) :25.6
	                
                
                ra(max) :0.6
	                
                
                rb(max) :0.6
	                
                
                Weight(g) 
                
                Open type :36.5
	                
                
                With shiled :36