This week we worked on the sprockets to increase the ratio for
the drive from 4 to 1 to 8 to 1 overall.
I had been working on the problem in my mind all week and with a
couple of failed practical experiments with bearings I had settled
on a wheelbarrow style bush/spindle support system.
Adam had ordered 2 new sprockets from calda morley with a bore
size of 12mm but when we looked at the sprockets they were much
smaller than the 12mm required so they needed work first off.

Earlier in the morning before this I had turned down the spindle to
support the 2 sprockets one of which I bought online and welded on
this onto the spindle.

One of the sprockets that Adam had brought was drilled out to fit the
spindle too and we had our 2 to 1 ratio-giving us 8 to 1 overall.
We had made one support bracket last week which needed slight modification
by means of a bush and housing welding to it and a second smaller version
bracket was made with bush/housing for the other side also.
This all seemed good and with the sprocket between the brackets it
seemed to line up well with the wheel and the motor sprockets.
There was a slight stiffness on the spindle in the bush but I narrowed this down
to the end cap of the spindle and I gave this a skim on the lathe after taking
Adam to the bus stop and it was a lot better.
I should be able to fit the chains beofre Adam comes over again and we can
see what difference these changes make.