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old Robin Hood, what is the braze on/hole in right chain stay for?

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old Robin Hood, what is the braze on/hole in right chain stay for?

Old 05-24-19, 09:31 AM
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old Robin Hood, what is the braze on/hole in right chain stay for?

I bought an old Robin Hood frame because it had Campagnolo shifters, derailleurs, headset and cable clips. The frame appears to be a 3spd,



that was set up like a road bike. It has a large braze on, with an unthreaded hole, on the right chain stay near the bottom bracket. Does anyone know what this hole is for? I hope your guys can help- Thanks- Don
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Old 05-24-19, 09:36 AM
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Power steering flud resevoir.
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Old 05-24-19, 09:54 AM
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It might have been an attachment point for a rod brake set up. The oil port on top of the BB points to an early frame. Hope you get this one rolling!
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Old 05-24-19, 10:54 AM
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I wonder if it would hold a pulley for the cable to the rear three speed hub?
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Old 05-24-19, 11:04 AM
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Along the lines of being for a shift cable pulley, could it be the "pulley" itself? Ie, the cable running under the cylinder like it was a pulley. If so, the "pulley" would just be a washerlike cylinder curved on the left side for the chainstay. Hole would not run through and the inside wold be painted. The location looks right for a clean lead form a downtube shifter.

Edit: the oilport can be seen on the BB shell.

Ben
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Old 05-24-19, 11:05 AM
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My guess is an attachment bolt for a chain guard.
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Old 05-24-19, 11:48 AM
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Originally Posted by Hudson308 View Post
My guess is an attachment bolt for a chain guard.
The hole isn't threaded....how would any sort of pulley or chain guard stay on there?
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Old 05-24-19, 11:58 AM
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Possibly a hole to receive a peg that would stabilize a chainguard?
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Old 05-24-19, 11:58 AM
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Originally Posted by Weresquatch View Post
The hole isn't threaded....how would any sort of pulley or chain guard stay on there?
That hole could be tapped for mounting a chaincase. They were just part of the frame for many years. I had a Popular Special frame that had that lug as well as the oil port on the bottom bracket. I'm guessing it was from about 1960. They stopped putting that lug on frames a few years later.
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Old 05-24-19, 11:59 AM
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Originally Posted by dweenk View Post
Possibly a hole to receive a peg that would stabilize a chainguard?
I've never seen a set up like that myself......I still like the rod-brake explanation best, but?
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Old 05-24-19, 01:02 PM
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This is pure speculation, but it seems to be in a location where it might keep a chain that gets dropped from wedging between the frame and the chainring.
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Old 05-24-19, 01:10 PM
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It is a mounting point for a full chaincase. I have the same on a 1956 Rudge and a 1952 Humber, both three speeds. Raleigh's three speed frames back then had the mount whether they shipped with a full case or just the hockey stick guard. You'll likely find that it is tapped for a 26tpi bolt if you clean off all the paint on it. My Rudge is tapped even though it was shipped with a hockey stick guard.

-Carl
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Old 05-24-19, 02:03 PM
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Quiver...
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Old 05-24-19, 02:23 PM
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Originally Posted by cszipper View Post
It is a mounting point for a full chaincase. I have the same on a 1956 Rudge and a 1952 Humber, both three speeds. Raleigh's three speed frames back then had the mount whether they shipped with a full case or just the hockey stick guard. You'll likely find that it is tapped for a 26tpi bolt if you clean off all the paint on it. My Rudge is tapped even though it was shipped with a hockey stick guard.

-Carl
This is all correct. They are often pre-tapped.
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Old 05-24-19, 04:37 PM
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Thank all you guys for the input. It looks like the consensus is that it is for a full chaincase. I'll go with that. I thought it might be for a chain guard, but assumed it would be threaded. I though the quiver comment was great! Thank you all again- Don
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Old 05-24-19, 10:02 PM
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Chaincase mounting boss.

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Old 05-25-19, 10:46 AM
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Thanks for the picture of the chain case. There is the hole for the bolt into the chain stay- Thanks again- Don
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