Found near a 1926 and 1940 coin, no clue...

[JccEldreth]

Found in a gravel drive way.
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[Plug N Play]

Looks like a chain sprocket for a bicycle.

 

[JccEldreth]

That is why it looks so fimular. That has to be it. Thanks!

 

[AlienLifeForm]

A little small for a bicycle, but it is definitely a sprocket.

 

[JccEldreth]

10 speed smallest one on the back wheel.

 

[NOLA_Ken]

10 speed smallest one on the back wheel.

Definitely not a drive cog from a bike wheel, the closest bike part would be a rear derailleur cog but I've never seen a metal one that I can think of. It does look like part of a chain drive system though, but it's too small for a bicycle chain. My first thought was a rowel from a spur, and it does look like one to me. I found a few similar on google images but the pics were really small and hard to make a match

 

[Back-of-the-boat]

It could be from inside a fishing reel

 

[Tony in SC]

It's not a drive sprocket, there's no keyway or splines to keep it from spinning on a shaft. It looks like it's for a No. 25 chain, maybe an idler etc.

Definitely not a drive cog from a bike wheel, the closest bike part would be a rear derailleur cog but I've never seen a metal one that I can think of. It does look like part of a chain drive system though, but it's too small for a bicycle chain. My first thought was a rowel from a spur, and it does look like one to me. I found a few similar on google images but the pics were really small and hard to make a match

 

[GopherDaGold]

Derailleur jockey wheel.

 

[marion moore]

It a called a plate spkt. since it doesn't have a hub on it, it comes that way so you

can drill 3 or 4 holes in it on a circular bolt pattern to match a clutch or etc. it could

be welded to a shaft but its hard to get true. it does look like a #25 pitch as some

has already mention. the more I look at it, I think is off of some kind of old farm
equitment, maybe a corn sheller thanks, marion