Pro-Weld CD-312 Manuel d'utilisateur télécharger pdf (Page 7)

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STUD

WELDING

ACCOMMODATING THE FILLET

When a stud is end-welded, a fillet forms around its base with the fillet dimensions being

closely controlled by the design of the ferrule used. Since the diameter of the fillet is gen-

erally larger than the diameter of the stud, some consideration is required in the design of

mating parts. Counter bore and counter sink methods are commonly used. Dimensions will

vary with studs and ferrules. Additional methods of accommodating fillet include over sized

clearance holes, use of a gasket material around the fillet or use of a dog type construction.

FILLET CLEARANCE FOR ELECTRIC-ARC WELDED FULL BASE STUDS

Stud Size Counterbore 90° Countersink

(inches) (inches) (inches)

ABC

1/4 0.437 0.125 0.125

5/16 0.500 0.125 0.125

3/8 0.593 0.125 0.125

7/16 0.656 0.187 0.125

1/2 0.750 0.187 0.187

5/8 0.875 0.218 0.187

3/4 1.125 0.312 0.187

(a) Oversize clearance hole (c) Dog clamp(b) Gasket material

Welded studs designed with reduced

weld bases so that weld fillet does not

exceed maximum diameter of fasten-

er. This design is not recommended if

fastener strength is important.

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Pro-Weld CD-312 Manuel d'utilisateur Page 7