Gents,

thank you for your suggestions. I'd rather move away from the press method, as I'm a bit worried it might not be sufficient enough. I was actually thinking of something Jonathan mentioned with the parallel expansion, here's a quick sketch:



Is it hard to machine such a thing? it should slide inside the shaft and then lock when the bolt is put it. The dia at the bottom could be 13.5-13.6mm with the 'D' shaped elements bent slightly to the inside so that it fits on the part. Putting a bolt in would push the sides out and press against the part. Main question is how strong will it hold it.

Would it be easier to do it like this or simple cut a 'D' shaped keyway in the off-the-shelf part ?

Regards,
dsc.