On Sun, 01 Jan 2006 00:18:02 -0600, Jon Elson
wrote:

ATP* wrote:
"Errol Groff" wrote in message
...

On Sat, 31 Dec 2005 20:12:48 -0500, "ATP*"
wrote:


I couldn't find this info on Google. What is the proper material to use to
replace the pin on a Bridgeport drawbar? I tried a roll pin which was way
too soft and sheared too easily.



In eighteen years of teaching high school freshmen and sophomores I
have never had a student break a BP drawbar in that fashion. Perhaps
you are putting WAY too much oomph into your spindle tightening.

Errol Groff



I don't know, I'm not really putting that much torque on it, especially not
the last time. The hollow roll pin I put in there definitely doesn't take
much to shear.


My guess is that it is NOT a shear pin, ie. designed to break first,
before something else does. It most likely is just the easiest way to
make it. I don't think my drawbar (aftermarket) has a shear pin.
I'd use a taper pin.

Jon

When I made up the 3 drawbars for the Gorton (uses any 30 taper), I
welded the hex on, after shearing the first pin.

Gunner

"Pax Americana is a philosophy. Hardly an empire.
Making sure other people play nice and dont kill each other (and us)
off in job lots is hardly empire building, particularly when you give
them self determination under "play nice" rules.

Think of it as having your older brother knock the **** out of you
for torturing the cat." Gunner