Paul,
There is new blow moulding technology - I'm unsure of the terminology. What
happens is that a piece of flat aluminium (in this case) of appropriate
thickness is blown into the desired shape.
I had an invite to a State Government facility designed to introduce new
manufacturing technology into local manufacturing - but as yet haven't taken
up the offer.
This technology can do the basic type or uncomplex type shapes, but I would
be surprised if it could provide the necessary shape for a bellhousing
without thinning the material in the ( stress) areas where it needs it most.

It may be worth looking at, I'm sure if we have it locally you will have it
over there.
George (down under)


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