SS 304 Drilling

[madhu_123]

I am trying to Drill dia 5.2mm holes on SS304 material using Carbide drills and HSS (cobalt M42 grade), can any one suggest right tools and cutting parameter. Need to drill 500 holes on 20mm thick plate, for every 20 holes drill is getting worn out... 

[Newbeeee™]

Welcome to the forum.

Good quality carbide drill = self centreing and through tool coolant.

60metres/min for speed

300mm/min for feed

Good coolant - 10% mix

I'd peck drill 6mm peck

You may need to fully retract each peck to allow for coolant to get in there etc?

If you're using something like a YG dream drill, I'd expect to drill all holes with the one drill.

 

If you're having issues, I'm assuming the material is good quality?

HTH

[Goldorak]

Sumitomo HGS series

 

I am currently drill some 9mm holes 30mm deep, 1800 rpm .007 ipm coolant thru

 

The drill will certainly drill the 5000 parts without any problems

[jeff]

The OSG EX-SUS GOLD drills are excellent in stainless

http://www.osgtool.com/Product-List-Detail/EX-SUS-GOLD-Drills/1600/detail/62552

[cncchipmaker]

Titex through coolant works great @ 400SFM.

[bdrake]

I run the mits mws solid carbid drills with thru coolant. Idk how cnc chip maker is getting 400 sfm but that is way to hot. i run around 190 sfm that with 1000 psi thru coolant and some drill ive seen up to 2500 inches of solid 304/316 on one drill.

[g huns]

I run the mits mws solid carbid drills with thru coolant. Idk how cnc chip maker is getting 400 sfm but that is way to hot. i run around 190 sfm that with 1000 psi thru coolant and some drill ive seen up to 2500 inches of solid 304/316 on one drill.

 

IDK either. Using Walter's GPS program, if I set it to have utter disregard for drill life, 257SFM is as fast as it will let me go. Drill life at 200SFM is 1890 holes, at 257SFM, it drops to 548 holes.

 

I am an unapologetic Walter fanboy. There might be better drills out there, but their GPS program is the bees knees for dummies like me. We just finished drilling some .250" holes, 3" deep in 52Rc H-13. About a minute per hole. GPS said the drill was good for 13.8 holes, I needed 15. Drilled 12, still looked good. Drilled the last 3 without incident. Saved a TON of EDM time.

[Guest]

Welcome to the forum.

Good quality carbide drill = self centreing and through tool coolant.

60metres/min for speed

300mm/min for feed

Good coolant - 10% mix

I'd peck drill 6mm peck

You may need to fully retract each peck to allow for coolant to get in there etc?

If you're using something like a YG dream drill, I'd expect to drill all holes with the one drill.

 

If you're having issues, I'm assuming the material is good quality?

HTH

 

What's this Meters per minute of what you speak.....  :headscratch:

 

Get with the program..Imperial rulz!  

[Newbeeee™]

What's this Meters per minute of what you speak.....  :headscratch:

 

Get with the program..Imperial rulz!  

You're soooooooo last Wednesday...

[Guest]

You're soooooooo last Wednesday...

 

C'mon

 

I'm at least six Saturdays from last year