Steels	%	%	%	%	%	%	%
chemical	C	Si	Mn	Cr	Mo	P	S
50Mn	0.48~0.56	0.17~0.37	0.70~1.00			≤0.035	≤0.035
42CrMo	0.38~0.45	0.17~0.37	0.50~0.80	0.90~1.20	0.15~0.25	≤0.030	≤0.030

We are using 50Mn or 42CrMo material to manufacture the slewing bearing. The numbering of the standard JB/T2300-1999 Rotary Fulcrum Bearing:

x   x   x  xx  xxxx

1)  2)  3) 4)   5)

1)   The types of products, 0-ball type rotary fulcrum bearing,1-pin roller type rotary fulcrum bearing

2)   The types of roll gang structure,1-single row crosswise pinroller type,single row four point contact ball type;double row reducing ball type;three row pin roller type.

3)   The types of transmission,gearless type;involute cylindrical gear,external gearing,minor modulus or large modulus; involute cylindrical gear,internal gearing,minor modulus or large modulus;

4)   The rolling element: steel ball or pin roller diameeter(mm).

5)    The cylinder diameter of roll gang centre.