Hi All,
Has anyone milled/cut 4130 chromoly steel on the MR-1 ? Just wondering.
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Yes, it cuts very similarly to A36. I had no issues.
Now, I have all the time I need. Sometimes these guys want fast. I guess I don’t program fast.
I had no issues with carbide tooling.
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Thanks for the reply. I am looking to cut 4130 fittings for aircraft thickness ranging from .025" to .125". Did not what to use any process that would add any heat to cutting parts as plasma does. What speeds, feed rates, depth of cuts and cutting tools used could you share with me.
Cheers,
KAP
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I will have to go back and check on Monday morning. It has been a year or so. I will send you a PM in the morning. Lots of coolant and relatively slow. Use good carbide tooling. I buy all my stuff from Lakeshore Carbide in Buffalo, NY.
I will get back to you unless one of our MR1 guys chimes in. We have some real milling savants on the forum.
Thank you. Look forward to your information.
Cheers,
KAP
I have been doing mostly 4340 lately - fuel distribution fasteners for large engines. Fasteners that must be strong, but not torqued to max bolt stretch. The MR-1 handles 4340 just fine at the feeds and rates that Langmuirs cheat sheet calls out: 3/8 tool, .040 stepover, .100 DOC @ 30 IPM if you are well fixtured. If you have a sketchy setup, the 3/8" rougher is a must for everything other than the last .020 of any contour. I use more sfm than LS recommends though.
The reason I mentioned all that is because 4130 is waaaaay easier to cut than 4340. If you wanted to, you could probably run the specs suggested for “soft ferrous metals” as a test. The only problem you might have is that you want to keep your parts cool. I do all steel with an air blast, not coolant. Sounds like thats not an option for you, so just go slow, keep the coolant on the part, i guess?
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Thank you, great information to know.
Cheers,
KAP