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Old 05-04-14, 05:33 PM   #1
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Rear Hub pawl spring wire

Cleaning and lubricating the "Normandy" rear hub on a bicycle and found the spring wire for one of the pawls is broken. I've searched for the .006" wire and found a roll of it for $48. A bit too much for what I need.

Anyone here have some? I only need about 6 inches of it.

Marc
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Old 05-04-14, 05:43 PM   #2
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I've used a strand from a brake cable to make pawl springs for freewheels, worked OK.
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Old 05-04-14, 08:14 PM   #3
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Maybe a guitar string will be close enough in diameter to work?
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Old 05-05-14, 10:23 AM   #4
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Hobby shops normally carry "music wire" in a range of sizes in 3 foot lengths.
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Old 05-05-14, 10:57 AM   #5
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I donno if this will work but I recently tore apart some old 3.5 inch "floppy disks" - the old square plastic things us old square plastic things used to keep backup files on and program files came on them. I plucked the stainless steel shutter doors off (seemed like a good sorta thin SS to keep a few of for fabricating who-knows-what). When you pull that SS shutter door off there is a wee spring in there that pushed the shutter closed. Those wee springs look a lot like FW pawl springs. Already wound about right and already spring steel.

Got any old 'floppy disks"? Maybe your Grandma has a couple.
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Old 05-05-14, 11:58 AM   #6
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Got any old 'floppy disks"? Maybe your Grandma has a couple.
My computer still has a floppy slot!
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Old 05-05-14, 12:26 PM   #7
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@ Prowler - good tip for where to find a really tiny spring. I'm guessing that the original poster is referring to the very thin wire that goes around the body that holds the pawls "shut" against the curly tiny springs.
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Old 05-06-14, 05:15 PM   #8
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Got any old 'floppy disks"? Maybe your Grandma has a couple.
Grandma my ass... I got a couple of boxes full... and a drive.

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Old 05-06-14, 10:11 PM   #9
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If you're just talking about holding the pawls down while you're putting the cogs over the freewheel base, just use Scotch tape. I did this on a FW I refurbed today.
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Old 05-07-14, 04:12 AM   #10
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Now ah only had two days a schooling in my life and both those days was singin so I don read 2 good but the OP said 'the spring wire for one of the pawls is broken'. If I recall ok from the few FW I've scattered around on the bench that sounds like the one spring wire on one of the two pawls that provides tension so the pawl is held out against the FW body to engage the ratchet teeth and makem bicycle go.

Where is the OP?
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Old 05-07-14, 05:09 AM   #11
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Now ah only had two days a schooling in my life and both those days was singin so I don read 2 good but the OP said 'the spring wire for one of the pawls is broken'. If I recall ok from the few FW I've scattered around on the bench that sounds like the one spring wire on one of the two pawls that provides tension so the pawl is held out against the FW body to engage the ratchet teeth and makem bicycle go.

Where is the OP?
That makes sense, but note, OP is talking about the pawl springs on a Normandy hub. Which is kind of like talking about the crank shaft on a canoe, or the feathers on a doorbell. Normandy hubs don't have pawl springs. That's because they don't have pawls. My guess is he inadvertently disassembled the freewheel in stead of removing it. Oy!
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Old 05-07-14, 05:34 AM   #12
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Cleaning and lubricating the "Normandy" rear hub on a bicycle and found the spring wire for one of the pawls is broken. I've searched for the .006" wire and found a roll of it for $48. A bit too much for what I need.

Anyone here have some? I only need about 6 inches of it.

Marc
@autoteacher, pictures and more information certainly would be helpful. @rhm has nailed this on the head, "Normandy" is a hub, and not a freewheel. So the first thing we need to know is what brand of freewheel are you working on?

There's a chance it is an Atom, a Maillard (both French like the hub), or Regina, but generally speaking these used two brass leaf springs to "push" each pawl open and engage the ratchet teeth.




Newer versions of Suntour, Shimano, Sachs, and Regina freewheels all use one round wire compression spring to "pull" each pawl to the open position to engage the ratchet teeth.



Some older versions of Suntour Perfect and New Winner, and older Atom and Regina freewheels used a wire spring to "push" the pawls open. On this variety the pawls have a small slot in the back of the pawl to help guide the spring.



So, if you ID the freewheel, one of us could possibly supply you with the appropriate spring for your particular model.
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Old 05-07-14, 06:23 AM   #13
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Thanks guys. As expected, I gotta lot to learn. Great photos too. Helps alot.
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Old 05-07-14, 06:40 AM   #14
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@autoteacher, pictures and more information certainly would be helpful. @rhm has nailed this on the head, "Normandy" is a hub, and not a freewheel. So the first thing we need to know is what brand of freewheel are you working on?

So, if you ID the freewheel, one of us could possibly supply you with the appropriate spring for your particular model.
Thanks for the replies. Been so busy lately I haven't been able to get back to this. I will get pictures ASAP.

M
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Old 05-07-14, 07:12 AM   #15
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Thanks for the replies. Been so busy lately I haven't been able to get back to this. I will get pictures ASAP.

M
Did any of the pictures I posted look similar to what you are working on? If so, which one?
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Old 05-07-14, 02:06 PM   #16
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Did any of the pictures I posted look similar to what you are working on? If so, which one?


Yes,

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File Type: jpg atom pawl.jpg (49.1 KB, 26 views)
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Old 05-07-14, 02:16 PM   #17
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Ah, it is an Atom FW. It probably would have been easier to remove it from the wheel before you started working on it.
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Old 05-07-14, 03:50 PM   #18
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Ah, it is an Atom FW. It probably would have been easier to remove it from the wheel before you started working on it.
Ah, but it makes such a nice platform to work on. I'm new at this, but learning new things is part of the journey.
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Old 05-07-14, 10:37 PM   #19
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@ Pastorbob - thanks for the visuals & great explanation. I have dismantled approximately 6-7 freewheels - all SunTour. Nice to see the innards of different ones.
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Old 05-08-14, 04:30 AM   #20
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Yes,

It looks as if you lost the tiny pin that holds the spring in place. They are just press fit into the inner body. Some just slip right out, while others can't be removed unless you grind them out and destroy the freewheel. I might be able to provide you with a replacement spring (although even though your spring is bent it will most likely work) and pin. But, this is your opportunity to make an upgrade, if ever so slightly.

Atom would eventually ditch the two notch inner body in favor of a splined inner body. Regina went to the same system so the same tool removes both models. Probably about the same time, Atom did away with using the tiny wire push springs in favor of the brass leaf push springs. IMO, the leaf springs are a big improvement over the wire springs.

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@ Pastorbob - thanks for the visuals & great explanation. I have dismantled approximately 6-7 freewheels - all SunTour. Nice to see the innards of different ones.
Thanks! Glad to help out.
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Old 05-08-14, 05:01 AM   #21
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It looks as if you lost the tiny pin that holds the spring in place.

Pin was removed to remove the broken (A piece of the end was under the pawl) spring.

Thanks for the reply
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Old 05-08-14, 08:33 AM   #22
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Pin was removed to remove the broken (A piece of the end was under the pawl) spring.

Thanks for the reply
I will try to take a look over the weekend to see if I have that vintage Atom freewheel on hand. If so you are welcome to it for postage.
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Old 05-13-14, 05:04 PM   #23
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I will try to take a look over the weekend to see if I have that vintage Atom freewheel on hand. If so you are welcome to it for postage.
Thanks, that would be nice.

Marc
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