Re: Machining 1018 Solid Steel Bar
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Tamra, if you have a 4-jaw independent jaw chuck, that would be better for accuracy. Takes a bit longer to dial it in, but if you're patient you can get the very best accuracy your lathe is capable of.?
You may not need 1.5000" on your part, but you can get it if you want. ? very good 3-jaw chuck can have .003" or more of runout. The one on my "good" lathe was out by .014". So I bought it a 4-jaw independent jaw chuck. For most parts, most people can get by with +/- .005", but as this is getting welded into a pressure vessel you may want a closer tolerance. After I'd practiced a bit, I could get +/- .0005 fairly easily, and .0001"? with a little extra care. You won't do that well at first, and it will take longer to do than with a 3-jaw. But if you use the 4-jaw often, you'll get better quickly. Likely faster than I did... ??
Bill in OKC?
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Wednesday, June 26, 2024 at 11:45:54 PM CDT, Tamra <tamrabrogdon@...> wrote:
I think the larger lathe may be more appropriate... will see... as I can't remember the accessories - if there are any at all on that lathe.? Son #1 bought that for me at an auction very inexpensively.? The only reason to not use the larger lathe, is I don't know if I can move it, or I don't know if I have a 3 jaw chuck on it or not.? ? I think it is on a lower shelf though, so I could move it to a cart if I had to.? ? I got distracted with the brass bed project and forgot to have him move that lathe for me...?
The only reason to machine this piece of steel on a desktop lathe, is because I can pick one of these up.? It isn't the lathe that is heavy, I think it is the motor....
This might be the time to look at my Machinist's Handbook... I do have one.
Tamra
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Bill in OKC too