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maybe he meant hardness brinell?

I thought I read in Msc to not use a Tialn Coating. I thought because it had ALuminum as a component of the coating aluminum was more likely to stick to it. I am a beginner to all this stuff so...

I was thinking. This might sound really dumb but what if you lay it out with a hand scribe and keep going over the lines with it. I mean when you scribe something you are actually cutting it. So you...

http://hyd-mech.com look up the dm 10. We have a large one in our shop and it is like they say "rock solid".

When oil is smoking is it burning? Right? And if it is burning it is really not cooling anything. Maybe lubricating but not cooling. Water is (in my opinion) the essential ingrediant in cooling...

6061 is the only grade my company uses. But we anodize it all the time. I am pretty sure you can't anodize 5052. Other people will correct me on this if I am wrong but I believe 30 series is the...

Let me tell you about the limit of my machine! I Broke 2 inserts today and bent two lock screws because I reached the limit of my spindle. It hung up while I was ramping into the part and totally...

I love asking dumb questions, but I was thinking the other day about how I would profile mill a part with no pockets or holes. It kind of baffled my feeble mind. I know you would have to hold it...

I thought people usually ground that kind of stuff.

Answer 1 : I always use the shortest end mill I can get away with. Deflection always increases with length. As long as the overall length of the EM is 3" then you can pocket the part in one...

I get good results at 625sfm and .1 doc. I have the chip load at .008. I finish it at .01 doc and it looks nice and shiny. I can get the chips blue though. Some of the ends of them are blue. I...

Yeah I agree I am horrified of Z plunging and my tools always break on the plunge for slots. I have never heard of a good formula or practice on here but then again I haven't looked to much. It does...

What is the C grade of P25 and is it available in an octagonal insert?

i meant 889rpm and 32.1 ipm

Yeah sorry I took so long responding. I bumped up the speed to 475 sfpm at 860rpm and 27.5 ipm. Chip load was up to nine thousanths. My chips were getting browner and the finish was starting to look...

so i should be able to go with the .002 thousands higher chip load and be fine? And are all my numbers good? I am just starting to figure all this sfm stuff out. I was just guessing for a year. ...

Don't buy a Southwestern Prototrak Dpm V5, what ever you do. We have to call the service peeps once a month for the servo blocks blowing up and they can't figure it out and southwestern seems like...

OK here is the situation. I am facing off 5.5" A36 structural steel blocks that are 12" square to a final depth of 5.125". I am cutting with a 2"seco octomill with 4 F40M TiN inserts. This is my...

I am going to be doing some engraving on some A 36 Steel.(The really gummy nasty stuff). I will be pocketing with a .0625 SGS 4 flute carbide end mill. I am worried about breaking a multitude of...

Most the time (almost all the time) I'm cutting bronze. I also cut alot of 6061 T6 Al.

What do you guys think is the best all around endmill manufacturing brand? I am curious because I am the only one in my company that knows anything about machining and I am stuck ordering tooling...

How do you thread mill a 1/4-20 thread????

I was talking about myself being ignorant and no I don't think I am stupid. I just don't know everything which may inadvertantly make me smarter than I think. HMMMM, interesting conundrum. HU I...

(chair) oops I have this tap holder

I this tap holder whatever it is. Do stupid comments by ignorant people perturb you guys. Just like all of mine.

I don't think I have a peck tapping option. The two tap operation scares the crap out of me.

By the way .201 is the correct hole size. Right? Every chart I referenced said it was to get 75% engagement. I am running the tap at 900 rpm also. Is that too fast. The Prototrak manual said it...

Yeah I was thinking it might be the chips in the hole making the hole more shallow. That happens even when I hand tap the holes. I have to go in and then out and then blow out the hole and retap to...

Yeah I forgot to mention that parameter. I do have a Lyndex floating tap holder.

I'm new to the machining world and I have a small dilemma. Back in March my company bought a Trak DPM V5 Bed Mill. Minus some "minor" programming glitches its fine. I want to take more advantage of...