pre-drilling before pocketing 1.0175 diameter hole

[3100]

Hi to all,   if material is .5" thick T6061 aluminum   and if I need to pre-drill this 1.0175 diameter hole before pocketing it to the -.5" with an endmill, what size spot drill, drill and endmill you would use and what type of pocketing cycle you would select to go best with the pre drilled hole. 

 

Thank you all in advance

[#Rekd™]

No need to drill a hole. Use a proper center cutting end mill that is made for Aluminum.

Loading more tools, more operations is a waste of time.

[3100]

Thank you for reply,  but I must pre-drill before machining in the exercise