Sm1 well versed with mazatrol 640m or atleast ne mazatrol

hey guys,
Ive been working on Mazak nexus 4000-II for just over 2 months , the thing is in the program monitor there is a small window which shows the load % of thrust force , now is there a way to know how much is the force in Newtons, The reason for wanting to know the thrust force in newtons is that i need to know how much clamping force i need to apply for a vibration free boring operation with spindle speed of around 800 rpm for a bore dia of around 62 mm.
PLSSSSSSSSSSSSSS HELP
PLSSSS:confused: