Arrow 500 SK40 Pull Stud

[NanoMagnetic]

No documentation on my arrows (I can only afford used machines), need helps:
1) Anybody know what type of pull stud used on arrow-2 SK40 spindle ? These machines came from U.K. manufactured in 2001. S/N no. 7042-F000-KT2290. GEFanuc 18i-M.
2) Belt driven main spindle max 12,000 rpm. Not sure about the max speed b'cos noisy at high rpm. Appreciate anyone to share his/her experiences.
Thanks

[laka]

Not sure about studs, ours is a CT40. But I think max RPM offered back then was 10k RPM. Ours is 8,000, but our manual lists 10,000 as an option.

Somewhere I found an override once that let me spin ours higher than 8000, but it too sounded no good.

[NanoMagnetic]

Thank you for sharing. The main spindle is lubricated by oil/air mist injector. We will try to adjust/replace the main spindle drive belts and share the infos.

[NanoMagnetic]

Confirmed SK-40 arbor + pull stud ( see attached picture ) on my machine. Changed to new spindle drive belts but still sound noisy at high speed ( >5,000 r.p.m ).