Iv just watched this vid
and do I get from this that a good know straight/true shaft in a collet chuck should have no run out ?
I ask as I have modded a er32 collet chuck holder like this
https://www.ebay.co.uk/itm/DIN2080-...936940?hash=item56669fcfec:g:K0wAAOSw-nZTqQBY
to fit the taper in my Harrison M300
when I test the run out in the holder its got minimal run out less than a 10th but when i put a collet in with a silver steel bar the bar in a 4 jaw runs with no run out I'm getting 3 to 4 thou run out close to the collet.
I don't think the collet is a cheap one as I got it from a firm that does work for Rolls Royce but it could be
I ask as I have modded a er32 collet chuck holder like this
https://www.ebay.co.uk/itm/DIN2080-...936940?hash=item56669fcfec:g:K0wAAOSw-nZTqQBY
to fit the taper in my Harrison M300
when I test the run out in the holder its got minimal run out less than a 10th but when i put a collet in with a silver steel bar the bar in a 4 jaw runs with no run out I'm getting 3 to 4 thou run out close to the collet.
I don't think the collet is a cheap one as I got it from a firm that does work for Rolls Royce but it could be