Drilling into type 321ss 2

[Santo928]

Need info on drill type, speed, pilot size drill for a 3/4 in. Hole drilled through a flange at 90 deg. To flange face for a pressure tap. Thickness of flange is 6 in. Concern about chips and wear on drill. Also suggest coolant type and rate.

 

[MikeHalloran]

Do you need a hole that big just to sense the pressure?



Mike Halloran
Pembroke Pines, FL, USA

 

[saberblue]

How many of these holes and on what type of machine? Are there any other parameters that you are concerned about?

 

[arlieb]

Here is what I would use.

Drill Kennametal Dynapoint with thru coolant. Kennametal Catalog # K210A07500HP
Speed / Feed 270 SFM and .010 IPR

This Sir is all you will need for tooling. Do not spot drill for the hole just drill it.