Vulcan Offshore Tip #6: Broken Stud Removal

Probably one of the most annoying problems in hammer repair is the removal of broken studs or screws. Shown above is an easy and proven method of removing the broken portion of the stud or screw without damage to the tapped hole.

Apply generous quantity of penetrating oil to stub of stud and let stand overnight if possible (Letter A).
Drill hole in broken stud as shown (Letter B). See table below for size of drill.
Using Ezy-Out^® as shown (Letter C) back out broken portion of stud. See table below for size of Ezy-Out^®.

EZY-OUT^® NO.	DRILL SIZE	STUD/SCREW SIZE
5	17/64″	9/16″-3/4″
6	13/32″	3/4″-1″
7	17/32″	1″-1 3/8″
8	13/16″	1 3/8″-1 3/4″
9	1 1/16″	1 1/34″-2 1/8″
10	1 5/16″	2 1/8″-2 1/2″
11	1 9/16″	2 1/2″-3″
12	1 15/16″	3″-3 1/2″
EZY-OUT^® IS THE REGISTERED TRADEMARK OF THE CLEVELAND TWIST DRILL CO.