I have recently been disassembling a 1989 Toyota 4runner for practice in preparation for restoration work I plan to carry out on another 4runner. One of the things I have to do is disassemble the body shell around the "B" pillar and the inner areas of the rear quarter panels. The structure of most modern vehicles are assemblies of many stamped sheet metal sections held together with hundreds of dime-sized spot welds. Disassembling a body shell requires a good tool to take apart many spot welds quickly and cleanly. If the parts need to be saved for reuse this is the way to go. This is where a spotweld drill comes into play. It's a tool that basically a small precision hole-saw that you use with a common electric or pneumatic drill. The better spotweld drills have replaceable pilot tips and cutters. A few companies offer a kit with a mandrel (the tool body), several replacement cutters and pilot tips or bits. One such company is Blair Equipment. The kit pictured bllow costs roughly $40.00. To download a video of the tool in action on a spotweld click here. Windows Media 1.9 MB or MPEG 7.6 MB
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Update: You don't have to buy the $40 kit to get started. Amazon has the basic tool with a single double sided cutter for sale for about $12.23. You can order double sided replacement cutting heads separately. They come three to a package (six cutting surfaces) for around $11.65. Your purchase will help support this blog.
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