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The diagram
below was something I drew up a while ago,
to give some reasonably close dimensional
information on the screws in use - it was
made from an actual screw so allow for some
slight tolerance inaccuracy. I reproduce it
in case it helps, and have discovered that
one forum member managed to find the same
screw re thread and length but with a Philips
head - which he used to replace a damaged
original.
The CAD program seemed to set the countersink
at 80º after drawing it up but in fact
it would be more likely to be 90º.
Note, as of Oct 2006, new screws are
being made from harder material - in fact
the same as the slide itself. It is still
however essential to use a good quality Allen
wrench. |
The main
consideration with preserving the original
grip screws is the use of a quality Allen
wrench - NOT a cheap sloppy tolerance
import!! This drawing shows 0.064"
as across flats measurement for the female
hex but - in fact it is probably slightly
less than that. Be sure to use a wrench
which is genuine 1/16" (0.0625")
so as to ensure a crisp fit - any ''slop''
will quickly distort the screw hex slot.
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If you
do suffer sufficient distortion of the
screw hex slot such that it will no longer
come out then, please be very careful
over drilling an old one out. One or two
R9 owners have done it and succeeded but
be warned, a small slip off center when
drilling will, if impacting the aluminum
frame threads, readily cause significant
damage.
I would personally suggest if entertaining
this, the use of a proper drill press,
to ensure the drill runs square to the
screw. Secondly I would suggest care in
selection of drill size so as to exploit
the worn hex socket to help stay on center.
Drill very slow and use cutting oil with
very gradual feed. The final use of a
small ''Easy Out'' may well help finish
the process.
Failing all this - play safe and return
the frame to Rohrbaugh! |
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Any further
input on this from people who have had
to drill out a damaged screw would be
appreciated, in order to help others.
Let me know through the The
Rohrbaugh Forum.
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