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Home > Forums > Industrial / Manufacturing Engineers > Activities > Machines & Machining engineering Forum

Drilling into type 321ss(2)

Read More Threads Like This One

Santo928 (Mechanical)

5 May 12 19:58

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 (Mechanical)

5 May 12 21:51

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

Mike Halloran
Pembroke Pines, FL, USA

saberblue (Industrial)

6 May 12 13:48

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

arlieb (Industrial)

31 May 12 7:22

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.

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