) I wanted to make some kind of hinged design like that, but ended up with a built in digital readout to replicate the position. It works pretty well.
I have a Chefwarekits jig ... it does utilize a click stop advance. I like the hinge plate on the Simon Hope jig!
Thanks for posting, I was thinking something like this might help with alignment.
From past threads I can see that you have machinist equipment so if you have a machine lathe capable of threading metal then all you need to cut threads in wood turnings is to make an adapter to mount your wood turning scroll chuck and a router mounted to the cross slide to drive the thread cutting bit. The metal lathe should be able provide any thread pitch you desire. I have been threading woodturnings using an older LaBlond lathe for about 30 years and via other setups since about 1990. The urn pictured as my avatar has a 2.5" - 8 thread that is one of my most recent uses as in the picture below. If you are interested I can post pictures of the system in use and answer any of you questions.
Thank you, Yes it is Watco "brushing gloss lacquer" sprayed on.
The majority of the threading done with the Klein style jigs is relatively small so if you can mount your woodturning chuck on your ML you should be able to thread small turnings. I would think, you sure would not want to hang a very large turning on one of those little jigs.
I would recommend 10tpi with extra tolerance to accommodate seasonal movement. The size of the annual growth rings can be a factor also in ring porous woods like oak. The wood should be dry when the threads are cut and not have any drying checks even ones that don't show. The use of CA can help to make a stronger thread especially if cutting in steps.
Sounds like what you did was cut a thread like a tapered pipe thread. Might even be a good idea to have a bit of taper in threads to account for seasonal distortion.
I have had several attempts with Oak. Even with CA glue none were as good as I'd hoped, but I was using the 16 tpi thread. The range of timber that will take a good thread is fairly limited. Finding supplies-more so
Don,
#1 The adapter for the 1 1/4 - 8 thread My lathe came with a 4C collet set that included 2 60 degree centers so I sacrificed one to make the adapter.
Are you using a climb cut? Some woods don't do well with a conventional cut.
I would recommend 8 tpi. The larger threads offer several advantages. They withstand moisture problems better than small boxes with 16 tpi. They show less thread damage.
8 tpi is my second choice as there is a lot of things to use it for for lathe tooling.
Wow! That hinge plate is a game changer!! that was always the issue with my chefware jig. And yes, the click system takes the guess-work out of how deep to go! thoughtful design!
Not just that, you can change the thread spindle in seconds with just one lock screw. As well as the usual 10 to 20 TPI spindles you can also buy M3.5, 1 1/4” and 1 1/2” versions to make your own lathe mount jigs. The fact that just one jig can fit virtually any lathe with a simple tool post change is yet another underestimated feature.
