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September 7th, 2010, 08:51 PM   #1
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Torque Limiter "disc spring" or "spring washer" needed!

My FE 650 starter was slipping. It came time to dig into the bike and get it fixed. I went straight for the Torque Limiter, planning to shim it. To my surprise the "disc spring" or "spring washer" had a section broken. Now the disc spring has like a piece of a pie cut out of it. This is obviously my problem. My question is where can i locate/buy the spring washer/disc spring. from my measurements it is 22mm OD X 11mm ID X 1.2ish mm thick with a slight convex shape to it. I dont want to have to buy a whole new torque limiter since this simple washer is my problem. I have looked in parts books and online but nothing shows the part # for just the spring washer. I am located in Houston TX USA. Please help!

Or if you know a simple aftermarket washer that will work.

Thanks all for reading the post!
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September 8th, 2010, 06:57 AM   #2
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Re: Torque Limiter "disc spring" or "spring washer" needed!

It is called a belleville washer. This would at least help your search.

http://en.wikipedia.org/wiki/Belleville_washer

Did you try www.mcmaster.com?
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September 8th, 2010, 09:41 AM   #3
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Re: Torque Limiter "disc spring" or "spring washer" needed!

Try this joker. I think he has the whole spring and shim kit available.
http://www.taffmeisters.co.uk/contact-us.html
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September 8th, 2010, 08:59 PM   #4
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Re: Torque Limiter "disc spring" or "spring washer" needed!

Thanks for the advice! So far i have found the booger called "spring washer" "disc spring" or "belleville washer". There are tons and tons of washers made of many different materials. Does anyone know the specific material? also the load when flat in preferably lbs. I am assuming the belleville washer is made of carbon steel but dont know what strength of a spring i need to get. different thickness/styles offer different load capabilities. Any insight to the load strengh (load when flattens) needed for the torque limiter?

Thanks,
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September 8th, 2010, 10:22 PM   #5
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Re: Torque Limiter "disc spring" or "spring washer" needed!

It's all been done for you.
viewtopic.php?f=5&t=12203&p=102985&hilit=+torque#p 102985
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September 9th, 2010, 06:36 AM   #6
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Re: Torque Limiter "disc spring" or "spring washer" needed!

Berger,

I have been talking with Taffy, thanks for letting me know he sells what i need. But I am still interested in more of the compound requirements and load requirements of the disc spring/belleville washer/spring washer. I am hoping to find one locally. I have found some made of Steel, Carbon Steel, and Stainless steel, vanadium and other alloys. The flattening load capabilites range from 205, 438, 994, 12xx, 14xx lbs. Anyone know what the Torque Limiter requires?

Thanks!
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September 9th, 2010, 08:45 AM   #7
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Re: Torque Limiter "disc spring" or "spring washer" needed!

Originally Posted by lorenplante
Berger,

I have been talking with Taffy, thanks for letting me know he sells what i need. But I am still interested in more of the compound requirements and load requirements of the disc spring/belleville washer/spring washer. I am hoping to find one locally. I have found some made of Steel, Carbon Steel, and Stainless steel, vanadium and other alloys. The flattening load capabilites range from 205, 438, 994, 12xx, 14xx lbs. Anyone know what the Torque Limiter requires?

Thanks!
OK....I'm just going to type what I'm thinking.
The only person who could probably answer your question is the engineer who built it. I don't think he is on the site.
If he did give you the specs, it would be for a product that doesn't work for shit.
So...from there you would have to make your own improvements....alot of trial and error. That's already been done by someone else (thank you taffy).
So if you still want to know, I suggest you buy one of each and give them each a try.
Please let us know your findings.
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September 9th, 2010, 09:17 AM   #8
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Re: Torque Limiter "disc spring" or "spring washer" needed!

There is a break-away test for rendering the torque limiter good or bad by using a torque wrench while having the limiter clamped in a vice (brass jaws of course). I just can't remember the value the wrench is to be set. Once you know the value, as berger says, it would be a matter of trial and error with different bellville washers.

Rick at Offroad BOSS knows where to set the torque wrench. I saw him test mine once and it broke away too soon. A new one held just fine. We replaced the unit which isn't cheap $$$.

Give BOSS a call. He's real helpful.
http://www.offroadboss.com/

Good thread by the way.
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September 9th, 2010, 02:30 PM   #9
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Re: Torque Limiter "disc spring" or "spring washer" needed!

I was hoping someone has already figured out thru trial and error, pure luck, or just knows the actual load requirements. It sounds like Taffy has already done the trial and error in figuring out what belleville washer load requirement works. I think it would be fantastic if Taffy or anyone else who knows this information can post it on this site for everyone to know, since this seems to be such a common problem. Ill ask Taffy and get back to you all. If no answer will either order thru Taffy or do trial and error myself, then let everyone know. Thanks for everyones input! I hope to get this figured out for everyones benefit!

As for the break point for the torque limiter, according to the Owners doc the limiter should break free at 12LB/10Nm. I know others like that a bit higher.
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September 10th, 2010, 01:23 AM   #10
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Re: Torque Limiter "disc spring" or "spring washer" needed!

well the doc is wrong. they are repaired at around 30lb of torque breakaway.

I don't recognise any conversation around a broken washer (which I didn't think was a belleville spring - i thought they were in the rekluse) but I do have one here in my stock of spares.

regards

Taffy
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