[ARC5] tool help

[Mike Hanz]

The Bristo splines of screws that small resemble a cross, Jay.  Hard to 
fit any more splines in that small a dimension.  I'm wondering if you 
can attack the problem in a different way, like lubricating the bearing 
surfaces with a small hypodermic needle filled with Kroil.  There's not 
much to the dial mechanism, just a couple of gears and the bearings.  
The bearings are just holes in the pot metal of the support mechanism, 
unfortunately, and often start galling when a little bit of corrosion 
sets in.  High zinc content pot metal (and aluminum) just love to lock 
up in that situation.

73,
Mike

jcoward5452 at aol.com wrote:

> Hi All,
>  I have a panel mount control box made by M.J.Johnson Aircraft 
> Engineering Co., a R-4002,that is basically a copy of an A.R.C. type 
> 12 box.I've been useing it for a few weeks now with no 
> problems.Suddenly the dial mechanism has bound up,not completely but 
> tight.In order to dismantle I need to remove the knobs.The knobs look 
> like A.R.C. knobs but the set screws are not spline (Bristo) 
> type.Rather they look like they need a cross point (+) (Phillpips) 
> screw driver.But not a pointed one.
> What would this be called and where do I get a set?