Help with 316 Stainless plate

[Mic6]

This stuff is killing me. I'm trying to drill a .261 hole thru .375 thk 316 Stainless. I'm currently using cobalt stub drills 135deg. The best result I had was 55 sfm .002ipt. It didn't last long, but it was the best one. I ended up helical boring them, but it was taking way long. Any parameter help would be much appreciated.

[Mic6]

32sfm .0018ipt using .1 peck is going beautifully now.

[crazy^millman]

Carbide Carbide Carbide yes with Cobalt about as good as you are going to get. Look to a good carbide drill with thru tool if you got through spindle and blast through it.

[Mic6]

Would LOVE TSC and carbide. I'm just happy I was able to get stub drills! Last minute job, no time to get specific tools. All is well though thanks

[workmantm]

When you see this stuff come up, look at the Accupro Carbide drills. Inexpensive compared to the productivity and I can tell you who makes them if you really need to know. I push these in a spring guide made of 304 Cond B and it's the only thing that made the job productive/cost effective.

[Thee Dragracer1951]

I"ve found that pecks aren't a good thing in 316

Gawd I hate that stuff

[Goldorak]

OSG makes some awesome HSS drills for Stainless steel plates

 

we can drill over 1000 holes with a single drill in SS316L plates (heat exchangers)

 

in 316 it's mandatory to drill to full depth without any peck, and use as much coolant as you can

 

if you use pecks , the surface of the plate get harder, so the drill wear really fast, not just on the cutting edges , but also on the diameter ...

[Goldorak]

about 50% of our production is stainless steel

 

after a few years you get some trick and techniques , at the end i prefer SS over aluminium O_o

[Mic6]

Made it through! Thanks for the tips, next time no pecks.

 

at the end i prefer SS over aluminium

 

PASS!

[left coast lefty]

OSG makes some awesome HSS drills for Stainless steel plates

 

we can drill over 1000 holes with a single drill in SS316L plates (heat exchangers)

 

in 316 it's mandatory to drill to full depth without any peck, and use as much coolant as you can

 

if you use pecks , the surface of the plate get harder, so the drill wear really fast, not just on the cutting edges , but also on the diameter ...

 

+100000