On Tue, 14 Aug 2007 17:32:05 -0400, Errol Groff
wrote:

On Tue, 14 Aug 2007 15:27:50 -0400, Wes wrote:

snip
Wes

I repaired a number of 5C drawbars using 4130 tubing from Aircraft
Spruce and Specialty. http://www.aircraftspruce.com/

1.375 OD and i don't remember exactly what ID I ordered but .090 wall
thickness comes to mind.

When you measure a 5C collet you will find that the OD is 1.235 and 20
threads per inch. I looked high and low for a 1.250 x 20 tap to no
avail. Finally i called MSC and talked to a fellow there. He made a
call to South Bend and in a three way conversation I learned that S.B.
made the threads 1.250 x 20. Standard tap in slightly $$.

Errol Groff


I used 4130 as well for my 5C drawbar. That was my first lathe
project, first inside threading, first tapers. Works great. I didn't
even think of looking for a tap. It single pointed o.k. with lots of
lube.

Pete Keillor