[ThorDiantral]

Our team has been experimenting with arm designs and different ways to power them. Our current supplies, as far as a spocket set up goes, are completely iron. We've ordered aluminum sprockets, which cut the weight by50%, if not more. We're were wondering if we could use aluminum for the shafts. We've looked around quite a bit but can only find keyed shafts made of steel or an alloy of steel. We were wondering if anyone had a supplier or maybe knew of a different material , similar weight-wise, to aluminum. Any help would be useful.

Here is what we're looking for:
Keyed Aluminum Shaft
3/4" in diameter
3/16" key width
1/16" key depth


Thanks again,
545