Here's a method I have had good success with removing broken bolts or
rounded out Phillips screw heads. Cut a relatively deep slot across the
surface of the bolt or screw. Exposed surfaces can be cut with a hack
saw or the blade of a thin cutting blade on an angle grinder. For
recessed surfaces, I've used a Dremel tool with a small tip to reach
down the hole and cut the slot. This can be tricky, and may require
trying different tips for various situations. Forntunately, there is a
multitude of tips and cutting attachments made for these tools. Then use
an appropriate sized flat head screwdriver to turn it out. if you can't
turn it with a regular screwdriver, try one of the screwdriver tips that
can be used with a ratchet.Use this method in conjunction with the other
suggestions of wax, heating, cooling, etc.
** triumphs@autox.team.net **
Archive: http://www.team.net/archive
|