On the last blog I made the guide block that guides the tap. Here I’ve made the tap and cut my first nut last night! I’m very excited about this accomplishment, this is really the most challenging part of the build and I think cutting the screw to fit will be pretty straight forward.
If you’re like me, you like looking at pictures more than reading so here are some pics showing the process I followed with a brief explanation.
Laid out thread pitch on paper (2tpi so on tick mark every 1/2” then connect the dots)
Taped the layout sheet onto the dowel.
Used double stick carpet tape to attached the depth stop onto my saw
Then simply cut down the line on my shooting board/Bench hook.
The kerf with this saw was actually to narrow so I had to go back over it with my panel saw to widen it out.
The next step is to find some steel to use as a cutter. My friend works at hospitals with a medical equipment company. He hooked me up with some surgical chisels that they were getting rid of. He said they were stainless steel so I was a little concerned that they wouldn’t be ideal for woodworking but the one I used worked out great. I plan to use the others to make Skew chisels and such.
This is the 1/2” chisel I used for my cutter.
I ground the 45 degree angles on both sides with the tool rest set on a slight angle to give the back edge of the blade good clearance.
I put a little hollow grind on the face of it to make it easier to flatten the face.
I laid out the mortise using the same pitch angle as the threads, drilled a couple of holes on the drill press and then chiseled out the waste.
The blade is wedge shaped so I used it in conjunction with a wooden wedge and it held in place pretty well.
Here is how I set up my Tap. The guide block is clamped to the nut, and the nut is clamped to the bench.
And here is the first pass through the nut.
It only takes 5 turns to get through this nut (about 2 1/2”). You have to make a lot of light passes to get to the full depth of the thread, I lost count but it was about 12ish.
And here is the final product!!!
And no project is complete without a drop of blood on it (top right of the whole). lol, I’m sure this happens to everyone.
I’ll be working on the screw next. I’ll be carving it by had, it seems pretty straight forward. Pray that it fits the nut! I don’t see any reason it shouldn’t.
Thanks for watching,
EDIT: I cant forget to again thank Carter for posting his blog on making wooden screws. He has some pretty good videos on the process here http://lumberjocks.com/CartersWhittling/blog/27648
-- Mauricio - Woodstock, GA - "Confusion is the Womb of Learning, with utter conviction being it's Tomb" Prof. T.O. Nitsch