'Usable accuracy' is something only you can decide.

I doubt very much whether the MT2 bore can be moved or adjusted relative to the table's main bearing. Its not that unusual though to have to carry out some rework to make (any) product to perform as you want. Bear in mind that you can only make it perform 'as it should' if the item was provided with a specification in the first place.

The first thing to check is how close fitting the table is in its journal, if its OK then I would forger the taper bore and machine it to parallel bore. If you do this on your milling machine with an end mill (say 10mm diameter) using something like a battery drill to rotate the table in it own bore, your new bore will be as concentric with the table as it will ever be.

Ian P

For what its worth, I agree with Vic.

Thanks

Trevor

Edited By Toolgrinding on 28/09/2014 11:16:14

I too had a similar problem with a RT purchased from one of the well known suppliers. Fortunately, always the careful one, I checked it ASAP and found the MT insert was not that accurate, swapped out by supplier.

With a little patience in setting up for the MT angle, you should be able to make a replacement that is more accurate than 0.010". In my own case, it was not only out radially, but the axis was out of true as well

I hope your table has an insert that can be changed.