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Thread: 1144 Round Rod

  1. #21
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    There has to be another supplier ther in Vegas. I live in the middle of nowhere and have access to 4 different suppliers who will deliver that for half that price. Granger even lists it for $66.00 for a 1' length.
    As far as machinability, it is really nice to work with. Get a decent carbide insert holder and make sure you have a solid tool post. You should be able to rip through that at around 600 - 900 rpm with a .005 - .05" depth of cut and .01 - .015"/rev feed rate and achieve a really nice finish.
    You will have to play with the speed feed and depth of cut a little in order to achieve the finish you are after depending on how rigid your setup is.

    Trying to make too light of a cut can actually work against you

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    1144 is not pre-hardened. Cannot speak for cutting with HSS (except drilling) but, heavy cuts, light cuts, heavy feeds, and light feeds, 1144 does not care.

    I've run feeds from .0005" to .020" IPR and DOC from .0005" to .500", it does not fight back. It will cut at any surface speed. I don't like to drop below about 250 SFM for productivity's sake.

    Not enough clearance on the tool? Too far above center?

    "104 per inch" - Your reading the threads per inch. The feed rate would be around .003" IPR. Your feed may actually be half of that depending on the thread pitch of the cross feed screw.

    Bill

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    20th vote for the idea that you got something else than you ordered.
    Sound more something like prehard 4340

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    When you have the stock mounted in the lathe, make a light face cut and confirm that the cutting tool is actually cutting on hoz. centerline. You should be able to see if the tool has been knocked out of alignment.

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    Did anyone notice the lathe he is using.....

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    Quote Originally Posted by Mebfab View Post
    Did anyone notice the lathe he is using.....
    "Lathe Shaped Object"....fixed it for ya...

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    Quote Originally Posted by digger doug View Post
    "Lathe Shaped Object"....fixed it for ya...
    If I can will try to attach a few pictures. Always careful to have cutters on center line. Tried the file test. File only left very fine, hairline, marks on bar.
    Not sure if it is working trying to add two photos, see them in "manage attachments" don't know if they will add to here?
    Attached Thumbnails Attached Thumbnails 1144-.jpg   1144.jpg  

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    Here are a few more pictures of tool holders I use, KDK. Some inserts, VNMG, VR82, and a small 1/4 inch triangle insert I got years ago and in search of more inserts for it, any suggestions?
    Thanks Todd inserts.jpgcutting-tool.jpgthreading-tool.jpg

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    If that shiny section of bar is the supposed 1144, it does not look at all like what I have received when 1144 was ordered.

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    If "File only left hairline marks", they sent you the wrong stuff.

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    Default Having Problems Machining 1144 Round Rod

    Quote Originally Posted by magneticanomaly View Post
    If "File only left hairline marks", they sent you the wrong stuff.
    Contacted the seller this morning, they state my piece was cut from their bin marked for 1144. What I might try to do is order a smaller piece from McMaster or Grainger to see if it is similar.
    I saw a couple other suggestions for steel in previous posts. Any more suggestions for a machinable steel that can withstand some friction, heat, not brittle. In other words for general automotive or medium mechanical use.
    Thanks again to all.

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    If I had to select a general purpose steel, I would use 4140 heat treated to 20-32 Rc. Very commonly available, hard enough for a lot of applications, easily machined, can be heat treated to the upper 40's, lower 50's.

    Tom

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    Seconding the suggestion of 4140 HT. It is perhaps my favorite steel to turn. It might provide a bit more trouble on a smaller machine than what I use though.

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    When you filed the piece, what RPM were you running the lathe at? Is it correct to assume this was on the 2-1/2" diameter mill scale finish?

    Nice new file, or rusty and abused antique?

    If I'm nosing in the right direction, try a good file on a corner of the material with 0 RPM. If the file cuts, material is unlikely the problem.

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    Quote Originally Posted by Sparky961 View Post
    When you filed the piece, what RPM were you running the lathe at? Is it correct to assume this was on the 2-1/2" diameter mill scale finish?

    Nice new file, or rusty and abused antique?

    If I'm nosing in the right direction, try a good file on a corner of the material with 0 RPM. If the file cuts, material is unlikely the problem.
    Even old abused antique file should cut 1144. But file will cut even Hastelloy and that has about zero machinability compared to 1144.

    To OP:
    Is it magnetic?
    What sort of sparks you get if you hit it with grinder?
    http://www.scrapmetaljunkie.com/241/...sting-metals-2

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    Default Having Problems Machining 1144 Round Rod

    Quote Originally Posted by MattiJ View Post
    Even old abused antique file should cut 1144. But file will cut even Hastelloy and that has about zero machinability compared to 1144.

    To OP:
    Is it magnetic?
    What sort of sparks you get if you hit it with grinder?
    The Spark Test and Spark Testing Metals | Scrap Metal Junkie
    When I was finishing a piece a few days back wanted to break the corner, had lathe at around 250 rpm, file would barely brake the edge. The supplier may have gotten the wrong stuff? Who knows.

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    There are lots of ways to figure out what you've got in front of you. If you only answer 10% of what people here are asking, you'll never know.

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    Quote Originally Posted by TDegenhart View Post
    If I had to select a general purpose steel, I would use 4140 heat treated to 20-32 Rc. Very commonly available, hard enough for a lot of applications, easily machined, can be heat treated to the upper 40's, lower 50's.

    Tom
    That's a typo. It should be 29-32 HRC.

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  23. #39
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    Quote Originally Posted by todd1 View Post
    ...they state my piece was cut from their bin marked for 1144.
    Yeah, well, what would you expect them to say?
    Invest an hour in your education: pay a visit to a machine shop and ask to SEE a piece of Stressproof bar stock.

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    I use 1144/stressproof often. Never ever came in shiny finish. When I started in a shop 40 years ago I learned about this stuff. Nice to machine, good mechanicals for how easy it is to machine. Case hardens well too. Never ever shiny bar though from the supplier..... Came out of the 1144 bin, LOL.
    I have a bunch of 7/8" round drops about 5 inches or so long. I could send you one in a priority mail flat rate box, and you could see how nice that stuff really is.

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