22-05-2024, 11:24 PM
Anyone know what diameter cutter I need to use to machine out the centre bearing to clear the crank?
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Boring out 3 brg crankcase for 2 brg crank
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22-05-2024, 11:24 PM
Anyone know what diameter cutter I need to use to machine out the centre bearing to clear the crank?
23-05-2024, 10:08 PM
You could give VINCE LEEK a call he doesn't do this mod any more (now semi-retired) but may be able to give some advise.
24-05-2024, 12:37 PM
I have just measured the one Vince Leek did for me a few years ago; as near as I can judge it's 4.75 inches diameter. I took a picture which I hope is of some use.
I think it is unlikely that I shall use this crankcase, so I am open to offers.
25-05-2024, 10:11 AM
Thanks for the reply Robert.
In the end I measured a two bearing case,well the thickness of the aluminum casting surrounding the bearing sleeve and took that away from the crank / cam centres and got a similar figure to you. I did speak to Vince for his advice which was very helpful,I’ve never machined one out before in thirty odd years.I’ll post a picture of the set up of how it was done when in the workshop.
25-05-2024, 01:30 PM
25-05-2024, 07:07 PM
(This post was last modified: 25-05-2024, 07:07 PM by Robert Foreman.)
Good work with the flying nail Dave.
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