RE: spindle speed-up of CNC
I am not familiar with the bearings in the latest inquiry regarding speeding up of the spindle. Regardless, the prior information posted pertains as much now if not more so.
Simply put, there is MUCH more to making a high speed spindle than simply putting in/on different gearing and/or a higher speed motor.
First you have to see if the bearing package contained in the mill is suitable/capable for the intended speed. (see prior post)
IF not, then you have to use high speed bearings (IE: BNC/BNT's or ceramic balled replacements). (See prior post)
Then, you have to construct/modify the lube system so that it will support the speed potential. (see prior post)
Then you have to redo the preloading so that you don't burn up the parts before you even start to cut. (do it again)
Finally, you need to know how to properly reassemble the spindle (not a simple R&R sort of deal) and regrind the ID to make the tool run coaxially with the new bearing C/L's.
Don't forget to re-balance everyting. Tolerable imbalance at low speeds becomes astronomical at speeds 2-3 times that of the OEM design intent.
If all this sounds confusing or too complicated, the task is probably not one that you may want to tackle as a DIY project. You're gonna need some professional help.
Some older machines (and tooling) were never designed or intended to run at 6 digit speeds. The technology that existed when they were created necessary to run at those speeds didn't exist or the capability was never intended.
Should you chose to press on regardless, BE CAREFUL.
Things that fail at high speed can do real damage to surrounding hardware and terminal damage to human tissue if it parts company.
