GUIDELINE TOLERANCES FOR ROLLED RING FORGINGS

ALLOWANCES AND TOLERANCES

There are practical limitations in dimensions and other characteristics of seamless rolled rings which vary according to the right and the producer's equipment. The degree of precision attainable in the manufacture of seamless rolled rings is dictated by the essential character of ring rolling equipment and unavoidable contingencies in rolling operations.

Theoretical exactness is seldom attained, and it is therefore necessary to compensate for deviations. The allowances and tolerances set forth herein represent what the Forging Industry Association believes to be typical within the industry, as determined by actual measurements of rings produced under normal operating conditions.

Experience within the industry shows that dimensional variations in rolling are commonly functions of the dimensions and materials involved. The allowances and tolerances herein are based upon this observed fact.

The experience of producers and purchasers of seamless rolled rings indicate that the allowances and tolerances set forth herein will provide adequate dimensional accuracy for most applications.