as I said in my first post (opening post) the belt could operate on a 24k spindle but it would be right on its limits or speed. I'm only going by what the spec of the belt says, if you disagree take it up with the belt maker not me.

the atc spindle bearings recently went and I replaced them with high quality bearings capable of 26k.

the servo motor in the machine cannot do ridid tapping. its only a 1.5hp motor that spins at 4000rpm. it has lots of torque granted, but 4000rpm is mega slow.

Quote Originally Posted by Boyan Silyavski View Post
BUt that servo motor does not spin at 24k rpm. Neither the chinese BT30 spindles will spin very fast. Also these belts setup is not made to spin that fast as you wish. So i don't see how you are going to do that?

I dont know what jobs you are aiming to do, but from my point of view is absurd to change servo motor functionality / rigid tapping, etc./ for high speed.

I think best would be you change to BT30 spindle using your servo motor. Or add faster chinese servomotor. And separately add 3kw spindle for other type of jobs.