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.
Best Tap and Die Sets for Machinists - Practical Machinist
2020年11月13日 — Vermont American 58-Piece Professional Tap and Die Set. Order Now. Each high carbon steel tap and die in this set achieve maximum corrosion resistance with precision cutting performance. All the taps in this set are plug style and have the recommended drill size laser marked on the side for convenience and practicality.
General | Proper Speed for drilling stainless steel | Practical ...
2008年4月10日 — 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. Oil was used by brushing it on the bit while running. I do not feel like it is overheating.
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.
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
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 ...
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.
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
CNC Machining | Drilling 304 stainless - Practical Machinist
2017年11月1日 — We have been recently using an inserted drill from K-Tool, called a Drill Sergeant. Looks sort of like a spade drill. It is for a .562 hole, 2" deep. We have been running 200 SFM, .004 IPR. So far we are up to nearly 400 holes on one insert, which is about $35. If you have a lot of holes, I highly recommend this. If only a few, go with cobalt-HSS.
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.