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This is the hardware I use. Brass bushings in limb holes and bolts that goes all the way through handle with knurled brass knobs. That way the bolt also serves as a second alignment pin.If wanted the bolt head can be hidden with an overlay.
I have tried the double threaded inserts that most bowyers use and have a question. The tapping tool used to make the threads in the drilled hole. Do you use a steering jig of some kind to make sure the tool goes in straight, or do you just do it by hand?
I have just used a hand tap with a starter and bottoming tap at the end. I haven't run into any problems but I know for certain they are not all perfectly straight when drilled or tapped. I find it hard to keep them perfectly straight when using a hand tap. Perhaps there is a better method.
For my tap I have another block of wood that is threaded that I know is straight. I hold it flat on the riser and let it start to center itself before clamping.
Yes bue, google a Tap Guide
Or a good straight hole in a block of wood
I use a nut placed flat on the riser and hold it in place with a wrench then use the tap. I make sure the nut stays flat on the riser the whole time...works slick for me.
I have not (yet) built TDs but on other projects I UNPLUG THE DRILL PRESS and put the tap in the chuck. Clamp the piece on the table in perfect alignment them lower the tap easy like into the piece and turn the chuck by hand.
I have a block that fits down over the alignment pins just like a limb. It has a drill bushing in it that keeps the tap in alignment.
For those that use the bolt as an alignment, I would think it would be critical that it were straight.
For those with 2 alignment pins and an oversized hole, not so important. The conical seat of the bezel allows for slight alignment issues.
I prefer the 2 alignment pins and oversized hole method. Keeps the finish from wearing inside the hole as you run the bolt in and out.
BigJim
Quote from: Crooked Stic on February 19, 2020, 07:14:35 PM
For my tap I have another block of wood that is threaded that I know is straight. I hold it flat on the riser and let it start to center itself before clamping.
Same for me.