[TheForge] Wood screw threads

[Dave Brown]

At 16:42 12/27/03, you wrote:
>I was wondering if anyone out there knows how to make wood screw or lag 
>screw threads.  I occasionaly make threaded ceiling or wall hooks and have 
>been just welding on the cut off threads from a lag screw.  I would prefer 
>to make the whole thing in one peice and eliminate the less traditional 
>weld.  Any help or ideas would be great.
>
>Thanks
>
>John Switzer

The last screw hooks I made I used lag screws.  Muriatic acid bath to get 
rid of the zinc.  Then drew the head down and out.  There was enough meat 
there to make the hook.  If you need more meat (i.e. metal for the bone 
heads here) <friendly grin> then I'm afraid you'll have to continue with 
the welding.

You could always draw out the stock to a 3 or 4 sided taper, flute the 
sides and then twist.  A uniform twist in tapered stock can be a bear to 
do, but it can be done.  The fluting will give it more bite.  Just don't 
make the twist too tight because you'll be working 3 or 4 spirals in the 
screw instead of the single spiral in a typical screw.

Dave Brown
Heritage Smithing
Green Bay, WI