The amazing variety of Cox wrenches

Yes, that depth difference is shown graphically here:



Early ones (LM Cox) were extensively marked, later ones not so.





My well-worn shop wrenches, picture makes them look pretty good.  Some have no screwdriver end.  



I ought to consolidate and chart them.  But I would be no good at ID'ing the more exotic Cox wrenches, just don't have any of those engines (Spook etc.)  I only have two .020 wrenches, a NIB and one I got recently from Bernie or Matt.  Only have one .010 wrench from long, long ago.  

The wrench on the right - indispensible




I wonder if Cox made these in-house or farmed them out.

rsv1cox wrote:Y....
The wrench on the right - indispensible



....

I could not agree more...the 360 degree head wrench...I have had one since I got my first COX red postage stamp backplate Stuka engine from a friend way back in 1974, and it still serves me as my favorite and most reliable COX 049 glow head wrench...I do not know though what the purpose of its wide fork on the other end is?

Mine maybe a bit distorted, but does not fit the flats on the cylinder top.

balogh wrote:Mine maybe a bit distorted, but does not fit the flats on the cylinder top.

With use the ears can get bent out of shape, I have had to put mine in a vice and straighten/squeeze them back again.

Not like all the metal surrounding the other type.

balogh wrote:Mine maybe a bit distorted, but does not fit the flats on the cylinder top.

I don't have a picture but I think the wide end of that wrench fits the  Crankcase to hold while turning the other glow plug or cylinder wrench. Remove the Prop, or put in a horizontal position and slide the wide end over the snout onto the crankcase from the front. It keeps you from ripping the engine off the front of the airplane if changing a glow head with the engine still mounted!

Marleysky wrote:

balogh wrote:Mine maybe a bit distorted, but does not fit the flats on the cylinder top.

I don't have a picture but I think the wide end of that wrench fits the  Crankcase to hold while turning the other glow plug or cylinder wrench. Remove the Prop, or put in a horizontal position and slide the wide end over the snout onto the crankcase from the front.

Could be dual use? Mine works fine on slit cylinders. Mine is marked Part # 1230.

Well, I was wrong..That wrench does not work from the front with the prop driver in place. I can get it on from the rear with the tank/mount removed.   See:

It might work with a narrow-nose crankcase with the slightly smaller drive plate

Edit. Sorry, that’s exactly what you have in the picture. Have you tried it without the spring?

KariFS wrote:It might work with a narrow-nose crankcase with the slightly smaller drive plate

Edit. Sorry, that’s exactly what you have in the picture. Have you tried it without the spring?

yes, removing the spring does not make enough room. the drive plate is still in the way.