Clutch centre repair? (2016)

Dean

Dean

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Jul 26, 2014
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Hi all

Has anyone tried repairing the notching on a clutch centre (see pic) by welding. I know replacement is the best option but can't stop thinking should be able to weld dress and re case harden. Will then need to temper back. Anyone know hardness? Should be an easy job. Any advice appreciated.

Thanks
Dean
 

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It would be quicker to machine a new one rather than messing about trying to repair that.

Martyn.
 
I'm inclined to agree with Martyn, but sorry it doesnt answer your question.
Has anyone made hard anodized alloy ones and if so how do they fare?
 
Just buy a new clutch centre and use Barnett or 750 style fiber plates to prevent notching (only the steel teeth of bronze plates cause these notches).
 
Welded and dressed back to size. Took about 4hours. Will take round to the local blacksmith to heat treat. Will just be heat treating the outer part. Looked at what a new one looks like to work out what temper temperature to go for. Looks like the purple colour so about 530 deg f. Update to follow.
 

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madass140 said:
I'm inclined to agree with Martyn, but sorry it doesnt answer your question.
Has anyone made hard anodized alloy ones and if so how do they fare?
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Hard anodising, can be done but a little expensive. Ever wondered how the notches happen - then you will have your answer!

Weld repair may have solved the notches, but to case harden it may prove problamatic - you'll find out why.
 
Dean,

You are obviously a very patient chap, but the way I would look at it would be to spend the four hours at work doing overtime. This would make more than enough to buy a new hardened centre. I do admire your patience though!
 
I just replace mine about 2 years ago after 38 years of some very hard riding, so not bad really and I am still using the orginal bronze and steel plates with well over 140k miles, for the price to replace it, is it really worth going to the troubles rebuilding the old one, then reharding it etc etc, they aren't that expensive to replace, under $100 with postage, wheather the new one will last as long, who knows, to me $100 isn't bad for a part that has lasted me that long.

Ashley
 
Hi madnorton

Please enlighten me... Sounds as though you have tried to harden one of these. Would like to know what happened?

Matchless

I would rather spend 4 hours getting a root canal done than spend any more time at work than I have to. I'm there too much already. Plus I enjoy tinkering. Parts are expensive but my time isn't. I get more satisfaction fixing something than buying a new one.

Different strokes for different folks.

Cheers
D
 
Dean said:
...........I would rather spend 4 hours getting a root canal done than spend any more time at work than I have to. I'm there too much already....... Cheers D
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Wow, I hope you're close to retiring from that job D, otherwise I'd be looking for another line of work . I'm just sayin' :wink: Nice looking repair job on the clutch center though
 
nortonspeed said:
Just buy a new clutch centre and use Barnett or 750 style fiber plates to prevent notching (only the steel teeth of bronze plates cause these notches).
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Agreed, plates are easy to replace as opposed to the clutch center. Clean the old one really well and use it as a paperweight.
 
Ok went and got the clutch centre heat treated. The hard part is not over heating the middle while heating the outer ring. Had to heat it fast. Used a heavy wall steel pipe on either side of the clutch centre as a heat sink and shield. Heated the outer part to cherry red then quenched in water. Then polished it and annealed and left to cool. Tried a file on it and it's hard so hopefully won't wear too fast.

So the breakdown is:

Time taken: about 5 hours.

Cost: $5 (20dirhams) the cost to pay to use the gas plant.

Satisfaction: 10 out of 10.

Now I know most people said just buy a new one but I saved about $115 (including postage) had something to do for half a day, enjoyed doing it and learnt a bit about heat treatment. So I'm happy....
 

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onya Dean, good to have a go and very self satisfying, I probably would of done the same thing when I was younger and had less money but more time on my hands.
 
Dean, what filler rod did you use? Is it an alloy that is heat treatable?
And good on you for reaching for the tools and learning stuff.
 
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Just bought a new, hardened AN hub this past week from Walridge - $170 CAD. They also offer an economy replacement part for about $85 CAD...

FWIW
 
Derek Wilson said:
Just bought a new, hardened AN hub this past week from Walridge - $170 CAD. They also offer an economy replacement part for about $85 CAD...

FWIW
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Amazing; not only are parts readily available for these icons, we get to choose how soon the job gets done again with inferior parts...
 
BERT said:
Amazing; not only are parts readily available for these icons, we get to choose how soon the job gets done again with inferior parts...
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Well, at least we have the good parts available. If one chooses to buy the inferior parts instead, that's their responsibility, not the vendor's. They only sell parts made to a lower price point because to many customers the price is more important than the quality.

Ken
 
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