from http://www.penturners.org/forum/showthread.php?t=53114
So we've got the threaded rod. A piece of it will be used to make a tap and the rest will be used for pen parts.
I haven't mastered the art of internal 3 start threading yet, so this is the way I do it for now.
I do have a vertical slide and milling bits, but thought I'd try a new way to make the tap.
First, turn a taper on the front few thread. I actually increased the taper after this picture.
Using a Flexi Dremel type rotary tool, I simply ground six grooves that I indexed using the fixed gear on the headstock. The Dremel tool is held in the toolpost.
In an attempt to get a positive rake, I cut the grooves above the centre line of the tap.
.....more in a minute:wink: Please let me finish before any comments, just so all the pics stay together, thanks:biggrin:
So we've got the threaded rod. A piece of it will be used to make a tap and the rest will be used for pen parts.
I haven't mastered the art of internal 3 start threading yet, so this is the way I do it for now.
I do have a vertical slide and milling bits, but thought I'd try a new way to make the tap.
First, turn a taper on the front few thread. I actually increased the taper after this picture.
Using a Flexi Dremel type rotary tool, I simply ground six grooves that I indexed using the fixed gear on the headstock. The Dremel tool is held in the toolpost.
In an attempt to get a positive rake, I cut the grooves above the centre line of the tap.
.....more in a minute:wink: Please let me finish before any comments, just so all the pics stay together, thanks:biggrin:
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