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Cox Engine of The Month
The amazing variety of Cox wrenches
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The amazing variety of Cox wrenches
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.
Then later while going through ebays offerings I found this:
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:
Then later while going through ebays offerings I found this:
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:
rsv1cox- Top Poster
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Posts : 11250
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Re: The amazing variety of Cox wrenches
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.
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.
balogh- Top Poster
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Re: 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.
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- Top Poster
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Posts : 11250
Join date : 2014-08-18
Location : West Virginia
Re: The amazing variety of Cox wrenches
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?
balogh- Top Poster
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rsv1cox- Top Poster
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Re: The amazing variety of Cox wrenches
Mine maybe a bit distorted, but does not fit the flats on the cylinder top.
balogh- Top Poster
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rsv1cox- Top Poster
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Re: The amazing variety of Cox wrenches
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!
Last edited by Marleysky on Thu Oct 28, 2021 12:39 pm; edited 1 time in total
Marleysky- Top Poster
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Re: The amazing variety of Cox wrenches
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.
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Marleysky- Top Poster
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Re: The amazing variety of Cox wrenches
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?
Edit. Sorry, that’s exactly what you have in the picture. Have you tried it without the spring?
KariFS- Diamond Member
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Re: The amazing variety of Cox wrenches
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.
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