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Post  rsv1cox Thu Oct 28, 2021 7:51 am

While going through the storage area of my display case I found these Cox wrenches and one caught my eye.  It has hexagon shaped reliefs and wondered what engine it was for.  

The amazing variety of Cox wrenches P1011924
The amazing variety of Cox wrenches P1011925

Then later while going through ebays offerings I found this:

The amazing variety of Cox wrenches Cox_sp10

Question answered.

I must have a couple of dozen of these scattered around and got to wondering if anyone collects them?  And if so, connects them to the engines they were designed for and defines them by the many different stampings.

A couple of threads here have touched on the issue, but nothing definitive.

Jacob came up with this:

The amazing variety of Cox wrenches Wrench10

The amazing variety of Cox wrenches Jacob_10
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Post  balogh Thu Oct 28, 2021 8:06 am

Bob,

I have a similar - albeit leaner- variety of COX wrenches, and noted that some  glow head wrenches have slightly different tab width, so the notches cut in the top fin of some heads will not accommodate the wider tabs. Also, some wrenches come with wider, some narrower fork openings for the cylinder removal -that I try to avoid using in general, anyway.

The later production black wrenches are softer and weaker compared to the older, galvanized ones, IMHO.
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Post  rsv1cox Thu Oct 28, 2021 10:01 am

Yes, that depth difference is shown graphically here:

The amazing variety of Cox wrenches P1011926

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

The amazing variety of Cox wrenches P1011928

The amazing variety of Cox wrenches P1011927

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

The amazing variety of Cox wrenches P1011929

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

The amazing variety of Cox wrenches P1011930


I wonder if Cox made these in-house or farmed them out.
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Post  balogh Thu Oct 28, 2021 11:05 am

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

The amazing variety of Cox wrenches P1011930

....

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?
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Post  rsv1cox Thu Oct 28, 2021 11:59 am

The amazing variety of Cox wrenches P1011932
The amazing variety of Cox wrenches P1011931
The amazing variety of Cox wrenches P1011933
The amazing variety of Cox wrenches P1011934
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Post  balogh Thu Oct 28, 2021 12:18 pm

Mine maybe a bit distorted, but does not fit the flats on the cylinder top.
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Post  rsv1cox Thu Oct 28, 2021 12:31 pm

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.

The amazing variety of Cox wrenches P1011935
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Post  Marleysky Thu Oct 28, 2021 12:32 pm

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. Small Cox Logo It keeps you from ripping the engine off the front of the airplane if changing a glow head with the engine still mounted!


Last edited by Marleysky on Thu Oct 28, 2021 12:39 pm; edited 1 time in total
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Post  rsv1cox Thu Oct 28, 2021 12:38 pm

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. Small Cox Logo

Could be dual use? Mine works fine on slit cylinders. Mine is marked Part # 1230.
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Post  Marleysky Thu Oct 28, 2021 12:52 pm

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:

The amazing variety of Cox wrenches F14fb210
The amazing variety of Cox wrenches A3675210
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Post  KariFS Thu Oct 28, 2021 1:55 pm

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

Edit. Sorry, that’s exactly what you have in the picture. Have you tried it without the spring?
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Post  Marleysky Thu Oct 28, 2021 9:02 pm

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

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. Sad
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