I am from India.I have CNC Turning wich has a Fanuc OT-D Control.The spindles max rpm is upto 4000.The spindle has 5 bearings in total.All are angular contact.Earlier bearings were of FAFNIR make wich came as a OE fitment.Now I have to replace them as the noise has increased.The question is suggest me a gud manufacturer of angular contact bearings.Here in India diff. makes r available such as RHP,FAFNIR etc.So for wich make shud I go.Also the wich type of preload shud be considered "Medium Preload" or "Light Preload" and wich grease shud be used while repalcing the bearings.