threads screw tip horns

[dmb25]

i have and interest in makings screw tip but i was wondering when you make the threads can u use a standard tap like 1/2 13 or is there a special type to use also whats the best way to get the end round to attach the reinforcing collar 

[bigsmoke]

Most people seem to be using 5/8-11 threads, but the 1/2 would work OK for a smaller horn, all things in proportion.
Using a 3/4" hole saw is probably the easiest way to cut the tenon on the horn.  That will give you more or less a 5/8 inch tenon.  Maybe lightly clean it up with a fine file and you are good to go.
The other way to cut the tenon is to mount the horn in a lathe and spin it.  I prefer the hole saw.
Have fun.
John

[Tim Crosby]

 John is right on the thread size. There are three Posts in tutorials that may help you. Here is one of them:

 http://americanlongrifles.org/forum/index.php?topic=13901.0

  Tim C. 

[The Original Griz]

I use 5/8-11 but I do spin mine on the lathe, it squares it on the horn better, in my opinion, and it's much more fun to have the horn swing wildly beside your hands while turning;)

[dmb25]

thanks for the information on the threads now when you spin it on a lathe are using a metal or wood lathe 

[bigsmoke]

I would imagine that most of us are using a wood lathe for doing that.
Just cannot think how you would configure a metal lathe to do that.
One thing you need to watch out for is after you have it mounted on the lathe, by hand run it through a couple of revolutions to make sure ithe horn doesn't run into any obstacles before you power it up.  You can waste more horns that way if you don't!!

[David Rase]

and it's much more fun to have the horn swing wildly beside your hands while turning;)

Griz, I can see you are easily entertained!
David

[bigsmoke]

Nah, Dave, I think Griz just likes a little pain once in a while.

[dmb25]

OK i was thinking with a metal lathe you could run it at slower RPM and would not be hard to rig up a tool rest i have also been thinking about making a spring poll for the job any thoughts on that

[Carl Dumke]

Ok,
Before launching into mounting it on the lathe--remember, slow is better.  I turn mine at about 250.  I know some that go as high as 700 or so.  Too high in my opinion.  Also remember that the taps are not made of the best steel and if you turn at a high speed, the whiplash of the lathe rocketing to that speed will snap the tap faster than you can shake a stick.  Also, I wear a face shield as the uneven rotation of the horn will vibrate the whole lathe. 

[The Original Griz]

I use a wood lathe that I cut the bed off to only 6" long, turned it sideways so the horn swings off the side of the bench, variable speed with the dial, but mine is a rheostat style so when it gets a little load on it the speed increases, just to keep me on my toes:)

Nah, Dave, I think Griz just likes a little pain once in a while.

Only because I deserve it:) I'm not a nice person... Thus Griz

Griz, I can see you are easily entertained!
David

Oh if you only knew,

[dmb25]

Ok thanks for all the advice

David Belzer