drive repair tips?

[Paul Koning]

>>>>> "der" == der Mouse <mouse at rodents.montreal.qc.ca> writes:

 >> Sounds like all you're missing is Bristol Spline.  [...]

 der> I don't think I've ever seen that, neither driver nor screw.
 der> Perhaps they're more common on the European side of the pond?  I
 der> seem to recall Tony talking about them a lot.

Mine is in a Collins mil-spec radio, from around 1950.  I think they
may be obsolete at this point.

 >> [...]; if you need to undo a Bristol spline screw, you'll need the
 >> real tool.

 der> The description makes it sound as though a flat-blade bit should
 der> work, if it's the right width to fit snugly into a diameter of
 der> the cylinder; it should fetch up against two of the splines, and
 der> while it likely would bend them out of true, it seems it should
 der> drive/draw the screw.

That sounds possible in principle.  It may not work in practice; the
grooves are rather shallow, maybe 10-15% of the bit diameter.

	paul