Best drills for 304 Stainless?? - Practical Machinist
2013年2月19日 · Whilst in mild steel a blunt drill will happily keep going to a fair degree, in 304 one or 2 1/4" holes even just 1/8" deep is the difference between disaster and success with a drill on the edge of needing a regrind. Also don't baby the feed, stainless cuts pretty easy, just needs a sharp cutting tool.
These are extra long drill bits (up to 18”) with flutes extending the entire length of the drill bit. The extra length makes them more fragile than a shorter length drill bit, and therefore they are more easily broken. Because of this, it’s usually best to drill as deep as possible with a jobbers length (or shorter) drill bit before
General | Drilling 303 Stainless Steel - Practical Machinist
2013年3月4日 · Im going to use a 120° carbide spot drill to locate the hole and a 0.015" or 0.020" depth of peck as There is not much room for chips to go. I feel that because of the small diameter of the drill my RPM should be more in the 80-120sfm range. I believe 303 is a free machining stainless leaving it less "gummy" like 304ss.
General | Drilling 304 Stainless Steel - Practical Machinist
2006年6月20日 · General wisdom on HSS in stainless is run at half the speed for steel (60-100ft/min). 500rpm for .500" diam gives you about 70ft/min. That would be 1000rpm for a 1/4" bit in steel. 500rpm for 1/4" in stainless. Start there, you might be able to bump up a tad, but watch the corners of your drill lips.
General | Best brand for drilling in stainless steel? | Practical ...
2010年5月25日 · I'm not sold on Viking drills.Ran a job a few years back drilling some inco 625 on a manual Lagun.Bought some #10 cobalt drills from McMaster & they ended up being Viking drills.I had to drill 252 holes through .600 thick,so a little better than 150 total inches.If I remember right I bought 2 packs of 12 drills & had to go back for one more pack & then was hand sharpening just to finish up the ...
General | Proper Speed for drilling stainless steel | Practical ...
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Best Tap and Die Sets for Machinists - Practical Machinist
2020年11月13日 · The Morse tap and die set comes in a protective metal casing and contains 1/4 to 1/2 NC & NF HSS plug taps, 1/4 to 1/2 NC & NF carbon steel 1″ OD dies, a #3 die stock, a #4 “T” handle tap wrench and a screwdriver. Greenfield Threading Tap, Drill and Round Die Set. Order Now. The Greenfield tap and die set features HSS taps and carbon ...
EDM Machining | Drilling stainless pipe - Practical Machinist
2007年8月23日 · As for speed- well, the carbide annular cutters are made for mag drills that run 250 to 500 rpm or so. I tend to run em at the low end of that in my mill. I also use em in my mag drill, mine is 450 rpm, and it works great. Sometimes on stainless, I build a mild steel jig that clamps to the stainless, and then I can run my mag drill.
General | Drill bit material and type - Practical Machinist
2006年12月28日 · I will be drill mainly mild steel and occationally either aluminium or stainless. My question is two fold, first: what is the difference betweem black oxide, TIN, bright, cobalt, etc. the second part, for what I'll be drilling (predominently less than 1/2" mostly in the 1/8" to 1/4" range what are the best bit type to use.
303 Stainless drilling feeds and speeds - Practical Machinist
2007年5月1日 · The parts have a first operation in the lathe and then move on to out VF-2SS for drilling. I am drilling 9/16 2.00 deep and it's a blind hole, I'm using a high quality 135 degree split point cobalt drill. I am just touching the part with a spot drill to remove the cut off tit left over from the turning operation then going in with the 9/16 drill.