Trying to drill and tap 2-56 and break alot of drills and taps in alum. 6061 any speed and feed help?

Mike

What feeds and speeds are you currently running?

Cody Stamper



(Note: The opinions expressed in this post are my own and are not necessarily those of machinetoolhelp.com and its management)

I am using a peck cycle,rpm 750,f1.5 peck .05, .575 dp for the drill,tapping rpm 150,f 2.6785,.4 dp,on 6061 alum.

Are you breaking the drill then breaking the tap because the drill broke? Or are you breaking drills sometimes and breaking taps others? My personal opinion is that your spindle speeds are too low on both accounts. What kind of machine is it? How old is the machine? Do you often have problems with, what seem like, basic processes? Let me know and I will give you my opinion, which, much like other opinions, is essentially worthless.

You're going way too slow. By my calculations that tap drill at 500-600 SFM that drill should be spinning well above 30,000RPM. I doubt that your machine has the capability to spin this fast, so I'd run the drill as fast as possible for your machine, and run as fast as possible on the tap will allow also.

Cody Stamper



(Note: The opinions expressed in this post are my own and are not necessarily those of machinetoolhelp.com and its management)