SOHC.co.uk Forums > CB350/400
Swing Arm Centre Bush - is it servicable????
Bryanj:
Cant use solid or where do you put the bolt that holds it all in. Sizes for wear check are in the manual and no idea on grade of material
waffey:
solid........doh!
a senior moment for me
Tomb:
I made my own swing arm spindle for my Triumph 500, it has a bolt through the same as yours, line reamed the phosphor bronze bushes 0.001" clear, and drilled and tapped the swing arm for grease nipples each side.
Material? I used free machining mild steel, but any EN* steel good for this sort of job will do, its not actually under much load as most of the stress is in Shear.
* I make drag bike components, wheel spindle, drive shafts etc, from EN24 https://www.steelexpress.co.uk/engineeringsteel/EN24T-properties.html
AshimotoK0:
--- Quote from: Tomb on February 23, 2018, 08:16:51 AM ---I made my own swing arm spindle for my Triumph 500, it has a bolt through the same as yours, line reamed the phosphor bronze bushes 0.001" clear, and drilled and tapped the swing arm for grease nipples each side.
Material? I used free machining mild steel, but any EN* steel good for this sort of job will do, its not actually under much load as most of the stress is in Shear.
* I make drag bike components, wheel spindle, drive shafts etc, from EN24 https://www.steelexpress.co.uk/engineeringsteel/EN24T-properties.html
--- End quote ---
I thought my 750 centre bush was hardened but when I showed it to the guy I work for 3-days/week he took a scriber to it and said it wasn't hardened. I can't see why the 400 one would need to be hardened in contact with a plastic bush but no expert on this. What's the best way of determining if a surface has been hardened? Anyone know?
Tomb:
In 40 years doing this stuff I havn't come across one that has been hardened, not saying there isn't any, just never come across any. EN24 is a pretty tough material, the miles that we do on old classics like these will probably see us out without having to replace it ever again if greased.
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