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Fixing a Swift RA clutch

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#1 GoldSpider

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Posted 25 June 2020 - 03:00 PM

I'm working on getting the RA clutch on my Swift 831's mount to properly apply and release friction to the RA shaft.  When I opened it up, there was what appeared to be a poorly fashioned strip of aluminum between the clutch bolt and the shaft.  Before I go too far down a rabbit hole with this, what is the "correct" material that should go between the bolt and shaft?

 

Here's what's in mine:

 

Ra clutch1
Ra clutch2

 

Thanks for the advice.



#2 Couder

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Posted 25 June 2020 - 03:34 PM

So is the aluminum acting as the brake? If so, maybe brass? Or possibly Teflon? I have some thin brass and Teflon if that's the way you want to go.



#3 GoldSpider

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Posted 25 June 2020 - 03:44 PM

So is the aluminum acting as the brake? If so, maybe brass? Or possibly Teflon? I have some thin brass and Teflon if that's the way you want to go.

That's the word I was looking for.  Yes, that raggedy piece of aluminum is acting as the brake. 



#4 Kasmos

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Posted 25 June 2020 - 04:07 PM

While it's sort of a brake, it's probably also serves as a buffer so that the hard steel of the screw doesn't mare the shaft it press on.

 

It could be original. Hopefully a 831 owner will chime in soon



#5 CharlieB

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Posted 25 June 2020 - 04:13 PM

Brass.



#6 CharlieB

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Posted 25 June 2020 - 04:18 PM

You can see it in this photo on top of the shaft.

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#7 GoldSpider

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Posted 25 June 2020 - 04:21 PM

You can see it in this photo on top of the shaft.

Charlie I figured you'd have a picture of exactly what I was looking for!  I might as well do some cleaning and re-greasing while I'm in here...



#8 CharlieB

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Posted 25 June 2020 - 04:27 PM

If you need exact dimensions, let me know.



#9 GoldSpider

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Posted 25 June 2020 - 05:25 PM

If you need exact dimensions, let me know.

If you don't mind.  If I can't get this aluminum piece into a shape that works (appears to be too thick) then I'll ask my machinist friend to make me one out of brass.




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