spindle nose selection overall parameter

[zoorg2]

Hi

I am new member and asking you to reply my question kindly.

I am looking to purchase a spindle chuck for my lathing cnc machine and i don't know how to select The spindle nose between A2-6 and A2-8 size.

whta's the parameters in this selection? for example-fixtures weight?cutting force&velocity?or...and "is there any formula or table for this kind selections accociation with that parameters?"

see all guys ,is very important that we know this differences scientifically.for example ,your plan is that you select one of the two machine between a proposal of a machine maker and two machine are alike in basic but differet in spindle nose.

it's very easy that kind of selection without chalenge with design element and comolex mathematical formula if there is appropriate selection table.
thank you very much
rassel