Vintage WorkshopServices for Brough Superior motorcycles and their contemporaries
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Vintage Workshop Services for Brough Superior motorcycles and their contemporaries |
Castle forks front leg bottom ends last update: 12/2003
| The castings came a bit rough, but still better than with the important
bits ground off... The good news is that this is cast steel. Strong and ductile. |
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| After cleaning the castings up, I started by milling the sides of the bottom ends ... |
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| ... and drilling the holes for the link pins. |
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| Now, it became apparent that I would need a jig for turning the stems. |
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| Which you can see in operation here. It holds the bottom end of the lug
with the correct offset to the centre line of the tube end.
Now I was able to face the top end and centre drill it while supporting it in steadies. |
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| Turning the step to go into the tube was a simple task then. |
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| I took them all onto the mill again then to finish the bottom end, as I
wanted to make quite sure the faces are parallel to the tube end.
I have seen enough Castle forks binding badly, which is usually due to all the bits not being well enough aligned. So better start with proper right angles... |
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