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How to Make Threads Without a Tapping Bit
Shop improvisation
B-Star Crafts is the guy who demonstrated how magnets can be used in hidden cabinet and drawer locks. That post did pretty well, and maybe this will interest you too: He came up with this MacGyver-like method of creating threads without using a tap set.
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"The advantage is that you can create threads of any size and shape of bolt and in a variety of materials (wood, plastic, gypsum board, metal, etc.)," he writes. "The disadvantage is that [hot glue] is weak against heat, so you need to be careful about frictional heat when tightening bolts."
While the connection's probably not robust enough for furniture, I'd love to see Matthias Wandel do a scientifically-measured stress test to see how much force (or fastening/unfastening) it takes for the connection to fail.
I'm sure the more serious among you will pooh-pooh this method, but the more I live out here in the middle of nowhere, the more I'm coming to admire improvised solutions with whatever tools you have on hand.
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Honestly, it’d be WAY better to go have a look at the Gougeon boat book (free PDF at: https://www.westsystem.com/the-gougeon-brothers-on-boat-construction/), which covers a ton of tecniques used in boat building and maintenance regarding epoxy to reinforce fasteners. This includes techniques for dropping threaded fasteners into holes where epoxy alone, without threads, secures the fastener. The book gets into discussions of pull-out force, etc. for anyone interested. I’ve occasionally reinforced threads in wood (made with a tap) via a technique inspired by this book: 1) drill and tap for your fastener as normal, 2) coat a sample fastener (which should be hex/Allen drive) well in mold release and let dry (hint: Aussie heavy hold hairspray is a great mold release for this. it’s just spray plastic), 3) put some epoxy in the threaded hole, 4) screw in the fastener and wipe up any squeeze out (have a little alcohol on hand) , 5) wait for the epoxy to set, 6) Use a tool with a bit of leverage and a hex driver bit to “pop” the fastener loose, then unscrew.
LOL. I like the MacGyver-ness, but this would strip out so fast. I can't imagine a suitable application. Just buy a set of taps...they can be affordable.