[R-390] Bristol Spline Screws

[Tisha Hayes]

I bought a small bag of Bristol Spline screws from Jamminpower about six
months ago. (I think it was 10 or 20 in a plastic bag). They worked out
great in putting the shaft clamps back into prime condition.

The term "bristo" was a typographic error that came from poor spell-checking
in the military manuals, once it got started the spelling error became part
of history.

I strongly recommend that if you can find bristol set screws to use them.
They are much better for tightening down the shaft clamps as they have a
much lower tendency to strip out when you really torque them down. From the
old literature, that was the primary reason on why the bristol spline was
adopted for certain applications.

Nowadays with improved alloys, better machining, etc.. it is very likely
that there are fasteners that would rival or exceed the bristol spline in
the applications we use them for.

Of course, I have had my share of broken shaft clamps, from time to time you
can find those at the way overpriced Surplus Sales of Nebraska or
periodically from Fair Radio.

I had investigated purchasing a lot of bristol set screws from a
manufacturer. The smallest manufacturing lot they would run was 5,000 screws
and the price was prohibitive. I did not want to be in the speciality
fastener business so I benched that idea.

Tisha
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