I have tried putting a thread on some wood doweling using my metric metal tap and die set (12 mm) and it was a failure, it looks like the tread is too fine for wood. What thread size do I need for wood any help and advice would be gratefully accepted.
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My threading chisels are 16 tpi Tom, you need a very dense wood to cut a thread on without altering it in any way
I keep meaning to treat myself to some proper chasers but need to save up first. You can drill the hole first then coat in ca glue then cut the thread and then give it another coat followed by another cut this should strengthen the thread the same if you are doing a male thread. As Doug stated the sizes that they sell the thread chasers for woodturners should give an idea of the size
bassethound
Executive Member
You can make your own by using and adapting old bolts and nuts Tom, can't remember but I have seen it somewhere 
bassethound
Executive Member
Making the large wooden bolt and nut. M４２木製ボルトナット作り - YouTube
you can just use any size nuts and bolts!
you can just use any size nuts and bolts!
rayf6604
Registered
If it's for kitless pen making you want to thread I don't believe it's possible with such fine threads.
bassethound
Executive Member
I did make a small one years ago by just cutting a bolt along the length a bit in half and used the left part as a thread chaser with the edge of the flat bit for doing the thread may do one again to show you! sometime
Penpal
Grand Master
So many ways, like this way, need a steady hand with the grinder, love those thin cutting disks and the strength needed to cut the outside thread. I just bought a number of cheap chinese pens with push fit caps fit for anyone to utilise the threads etc, totally impressed so far. One is my daily user fountain.
Peter.
Peter.
Its the pitch of the tread that is the decider Tom, rather than the diameter, coupled with the profile of the "teeth". On very very dense woods, such as box or african blackwood for instance, you may get away with a fine pitch - maybe a millimetre or so, but on other less dense wood you are wasting your time unless the pitch is much more coarse.