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Something new.
Alan Offline
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#1
24-02-2019, 02:49 PM (This post was last modified: 24-02-2019, 02:50 PM by Alan.)
Taking apart a magneto engine, today, I found this modification to the cam centre bearing. It’s surely not original. Now I can’t decide whether to revert to rollers or leave it as it is.


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Alan Fairless
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Ruairidh Dunford Offline
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#2
24-02-2019, 03:05 PM
I have dismantled at least two engines where the centre rollers, ring and casting were completely missing, they still ran!
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Dave Wortley Offline
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#3
24-02-2019, 03:09 PM
Isn't that a mod that Jim White showed in The Special Builder's Guide?
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Alan Offline
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#4
24-02-2019, 03:12 PM
Yes it is. I hadn’t seen one before though
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Chris KC Offline
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#5
24-02-2019, 06:13 PM
I think something similar is described in the 750 Companion, isn't it?

If it's doing its job properly I don't see any reason to replace it.
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Tom the Blacksmith Offline
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#6
24-02-2019, 09:59 PM
Hi Alan. 

I've made something very similar so I'd keep it! The problem I had was that the cam roller track was worn so replacing outer and rollers wasn't going solve the problem. That and I hate crowded rollers anyway.
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