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.
General | Proper Speed for drilling stainless steel | Practical ...
2008年4月10日 · What is the proper RPM for drilling stainless steel under the listed conditions? 1/4" thick bar of 304 Stainless steel. 5/16" cobolt drill bit Manual drill press I used a drill press running at Aprox. 100 RPM and after 16 holes the bit is starting to dull. The chips are not blue, and the hole is coming thru the back with out burning.
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 | 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 …
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.
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 ...
Good/Best Taps/Drill Bit for SS 316?? - Practical Machinist
2013年11月2日 · Guys I need a good hand tap and drill bit 1/2-20 recommendation that will work on 316SS.Its a thru hole into 1/2-1"plate/rod.I have read so much doom/gloom about working SS and how it will work harden quickly.I do want a tap that if I use it correctly that it will last me more than just couple holes.I know it won't be cheap,but I'm willing to ...
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.
Drilling 316 Stainless Steel Speeds And Feeds - Practical Machinist
2019年3月30日 · I'm trying to drill into 4mm of 316 Bohler stainless steel plate with a Gurhing Step 1.2mm (.0472inch) drill bits. I am using a multiple drill system or gang drill to make multiple holes at the same time. I'm breaking bits because I know my feed and speed are not right and I admit that I am new at doing this. PLUS
How do you drill 1/4" holes in 304 stainless? - Practical Machinist
2014年12月16日 · 3) Use a cutting fluid for stainless steel; to maintain the corrosion resistance of the stainless steel use a non-sulphurized oil. Just dribble it on by hand. I use COOL TOOL II. 4) Keep the drill cutting; do not allow it to dwell or rub. Austenitic stainless steel work hardens quickly and dulls the drill if allowed to rub.