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Old 04-30-12, 08:45 AM   #1
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anybody familliar with Sturmey Archer AB 3 speed drum brake hubs?

well sometimes the deamon of the dump throws me a nice morsel.

I got a 30's bike with one of these hubs and a nice matching front drum hub.

the spokes were all rusted and the rims matched the spokes, I stripped out the hubs, and located 2 period correct rims that were salvageable-complete with red innertubes and USSR gray tyres!

I stripped down the hub as best i could but I just cant get it open,
there sems to be a mishmash of incorrect washers on the thing.
Anybody delt with one of these and can help me get it back together?

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Old 04-30-12, 08:55 AM   #2
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sheldon browns website has some info on those. the ab is like the aw but with a drum brake. he has a cutaway skematic on his site...
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Old 04-30-12, 08:59 AM   #3
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I haven't dealt with an AB specifically, but have dealt with my share of Sturmey Archer hubs of that period, some with dynamos; and I know there are other forum members who've dealt with AB's specifically. Zaphod Beeblebrox comes to mind....

I trust you found this?

I wouldn't worry about the mismatch of spacers. With IG hubs it's important that the overall locknut width closely matches the dropout spacing, and that the dropouts are perfectly parallel, so the axle is straight when the wheel is installed. And then it's important that the cog lines up with the chain ring so the chain is straight. So if a mechanic added something here and there to make things line up right, that's not a problem.

What's the date on your hub? I see a couple features that suggest it's newer than the 30's.
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Old 04-30-12, 09:11 AM   #4
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thats not my picture- but tell me what to look for- my hub looks just like the one above.

I will need a shifter and 2 correct brake levers for my old ride.-anyone?

my bike I am building is a very little known Finnish manufacturer "Cresto"
there is this one in a museum- shame I am missing the headbadge, mine is much more colorful with a 3 color paintjob- I will post pics when it looks more the a pile of parts.

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Old 04-30-12, 09:28 AM   #5
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Quote:
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thats not my picture- but tell me what to look for- my hub looks just like the one above.
Okay, fair enough. Three pointers on the date:

There is a date on the hub shell. Typically the year is two digits which are followed by a space and then the month in one or two digits. On pre-war models --I'm not sure when the AB was introduced, but this is true of AW's anyway-- the year may be a single digit, where 9 = 1939, 0 = 1940. After the war they used two digits, i.e. 48 = 1948.

Second, the driver in your photo is grooved for a 3-splined cog; these were introduced in 50's. The part is interchangeable, so possibly you have a 30's hub with a later driver; but the early driver is threaded and the cog screws on.

Third, the right axle nut in your photo has a round window in it; earlier ones have a square window.

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I will need a shifter ...

The early shifter is a 'quadrant shifter' that is kinda expensive on ebay; but you can use any Sturmey Archer handlebar mounted "trigger shifter".

Quote:
Originally Posted by puchfinnland View Post
and 2 correct brake levers for my old ride.-anyone?
I have those, but these are not hard to find. You can probably find them nearer by.
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Old 04-30-12, 10:37 AM   #6
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it had a corroded handlebar shifter.

the sprocket goes on by the now standard 3 nubs and the spring ring.

it has a round window in the nut

the numbers on the hub- AB 4 12


I notice in the drawings the right side bearing race comes off with a special tool- dont have the tool- any other solutions? hub is not in a wheel.
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Old 04-30-12, 10:58 AM   #7
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4 12, huh? Well, that's what I get for sounding like a know it all. I don't know what that date means. I'd guess December 1944, but I don't know if they were making hubs through the war. Let's hope someone else does.

Okay, so you've removed the axle nut, washers, locknut and cone from the left side of the hub, right? And now you want to unscrew the right side cup. I have done this with a hammer and chisel. I used an old carpenter's chisel. It doesn't do the chisel any good, and if you slip you can hurt yourself pretty bad, but the chisel being a little softer than the cup you won't hurt the hub. It's easier to do before you cut the spokes, but never mind that. You can hold the hub in a vise in various ways, such as by cutting wooden jaws of the right shape; but I haven't had to do that. I found the weight of the hub was enough; holding the hub between my knees, put the chisel in one of the notches on the hub and knock it with the hammer. Very easy to put the chisel through your knee when you do this, so wear protection (heavy jeans at the very least, a leather apron would be better) and be careful. In my experience the cup isn't usually too tight and comes loose after a few good taps of the hammer.
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Old 04-30-12, 11:04 AM   #8
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I will get out my Barr Quarton 2" will that due?

I will get back to this thread in 12 hours, time to come inside and put kids to bed.
(I found a toptube shifter for 30€!!! not mine yet but I hope so soon!)


before I start- LEFT OR RIGHT HAND THREADS????

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Old 05-01-12, 11:22 AM   #9
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Ok RHM, I took your advise and the chisel trick worked out in a pinch!
opened right up. inside it was like dried chalk, happy i opened it up and cleaned,greased and oiled the thing.

I started putting it back together and noticed one of the lock nuts is worthless, the threads are all buggered up,

will this be an easy nut to find?

I post picks of the bike frame im putting back together shortly

thanks so far for the help
mike
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Old 05-01-12, 11:52 AM   #10
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Originally Posted by puchfinnland View Post
Ok RHM, I took your advise and the chisel trick worked out in a pinch!
opened right up. inside it was like dried chalk, happy i opened it up and cleaned,greased and oiled the thing.

I started putting it back together and noticed one of the lock nuts is worthless, the threads are all buggered up,

will this be an easy nut to find?

I post picks of the bike frame im putting back together shortly

thanks so far for the help
mike
Great, no knee injury?

Yes, they still make those locknuts. I don't know where to get Sturmey Archer parts in Finland, though. Does your hub have the rectangular washers that are bent over at two edges to hold the cone in place? If so, you can probably use your buggered locknut without issues; the rectangular washer does the job. If you don't have the rectangular washers, get two of those when you find the place to get Sturmey Archer parts in Finland. Oh, and get a couple locknuts while you're there.
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Old 05-01-12, 12:27 PM   #11
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no knee injury, I used a really dull chisel- The Barr Quarton chisels stayed with the Marples safe and sound.


yes, the rectangular washer is on the drive side. its that little thin nut that is all wankered and loose.

the drum side has a collection of washers- I have to check the exploded view.

this is what I am assembling- I cant say restoring as only think that is going to be new is
new paint on the rims to match, new chain, new spokes


I just love the lugwork


I started a new thread on this bike build

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Old 05-01-12, 06:24 PM   #12
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According to the SA Heritage site the AB/C hub was introduced in 1937

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Old 02-20-13, 10:48 PM   #13
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OK, now I need help with one of these. I think it might be ideal to put into my Raleigh Twenty. I have a front drum brake hub for it. I have an AB hub I could build into the rear wheel. These two hubs would solve the problem of brakes on this model, since it has awful caliper brakes.

I'm missing the so-called brake lever for the AB hub. The old hub I have, which is from the 50's or 60's, looks to be largely compatible with the currently made model. The tech doc for the modern model shows the lever to be part number HSB 220, but how do I find who sells this part? I can't find it with a web search. Should I ask my LBS?
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Old 02-20-13, 10:59 PM   #14
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Since google didn't help, it occurred to me to ask bing. And yes, I found a company that can sell me the part, hollandbikeshop.com. The part is 4 euros, VAT is almost 7 euros, and shipping is 35 euros. No thanks!
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Old 02-21-13, 01:00 AM   #15
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Tom-
call baynesville bike shop in Maryland- he has so much sturmey parts NOS and he is there to help people.
funny winter hours.
Dallas and I visited him in December and the man knows his stuff!

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Old 02-21-13, 07:54 AM   #16
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Thanks, Mike. I'll do that.

Also, there's a guy selling a whole brake on ebay. It's for a new model hub, but it just might fit my old hub. LINK
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