Posted on 7th Mar 2011 @ 7:43 PM
REMOVING SPOT WELDS
Removing spot welds is a common task among auto body restoration enthusiasts. Using a spot weld drill bit, as opposed to a standard drill bit, is much more effective and efficient. In many cases the back layer has to stay intact, this is where a spot weld cutter is worth its weight in gold. A high end spot weld cutter will blow through the spot weld leaving the second panel intact eliminating the need to replace the back panel. The following instructions detail the steps required to remove spot welds from vehicles.
1. You must measure the spot welds that you are planning to remove. It is very important that you buy a bit that is 1/8 to 1/4 inch larger in diameter than the spot weld that you plan to remove. Some people choose to sand the spot weld before drilling to increase the likelihood of a cleanly drilled hole.
2. Make a small center punch in the spot weld to allow the spot weld cutter to grip.
3. Place the bit into the center punch and begin drilling. Always remember to check RPM recommendations before drilling. If you are using an ABDS TiN coated 187, RPM's must be run much slower (490). The Boron Buster has a recommended RPM rating of 1000. Following rpm instructions will ensure proper removal and long life of the bit. After the bit has punched through the surface, allow it to continue spinning until it is pulled back through the punched hole.
4. Repeat these steps until all of the desired spot welds have been removed.