This is where my brain fogs-over again - does the lower power matter when cutting or does it just mean less electricity is used to do the work?
If my calculator says i need 4Nm to do a task at 100rpm and the motor is rated 6Nm at 3000rpm - it will do the task easily yes?
I may make things worse by trying to explain but....
Ok you need the torque to do the job but you also require the horsepower to do it in the required time.
The tapping calc I linked to can maybe make you think it is all surface speed but you also have to take into account the feed per rev, a tap has a fixed feed per rev due to the pitch, a M10 has to move at 1.5mm per rev.
So you need the torque to drive the tap round but you also need the horsepower to feed it at 1.5mm per rev.
So you may have enough torque to twist the tap in the material but you may not have the required horsepower to feed it at the required rate.
See, told you I would probably make things worse
Regarding your bushes, I may have a kit, bought it for my series 1 boss but never used it, not sure if it is the same size as the 2J head or not?
I could measure the bushes if you want.
Regarding the power, you will probably find you have plenty, my Computurn lathe has a 12Kw servo for the spindle, 2x 3Kw motors for axes, a 0.5Kw servo for the turret and various other motors such as oil pump (0.75Kw) Coolant etc etc. The Chiron has 3x 2Kw axes motors , 8Kw spindle, and coolant pumps as well as other electrical stuff ( on both machines) such as lights, and all the components in the cabinet. Both machines are via a 32 amp breaker (C Type) and I often run both machines at the same time with no issues.
Hood