A quick trip to the local scrap yard got me a piece of 6mm steel plate large enough to make at least two new cam disks for the Hauser. These have been roughed into octagons using an angle grinder, ready to either put on the lathe or a rotary table on the mill.

I still haven’t worked out how to hold them while machining them round. Ultimately they need a 60mm hole through the middle for mounting on the post of the cam drive, I may bore this hole first and then grip inside this with the chuck.