Machining 4140
#12
(07-04-2020, 06:24 PM)f350ca Wrote: Even prehardened isn't that tough to machine with carbide. You have to take reasonable heavy cuts to get a good finish. If you come up shy and have to remove 1 or 2 thou the finish sucks.

That makes a lot of sense, I use this stuff for a lot of my projects and I've been frustrated so many times that I'll be getting a good finish through the whole roughing process then stuff it up in the last couple of cuts. Also I was encouraged a while ago to push it harder to make chips rather than ribbons; I was surprised how hard I had to go, i.e. in SFM, DOC and feed. Previously I'd always had one chip per cut.
Lathe (n); a machine tool used in the production of milling machine components.

Milling Machine (n); a machine tool used in the production of lathe components.
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Messages In This Thread
Machining 4140 - by Cross Slide - 07-03-2020, 03:44 PM
RE: Machining 4140 - by Dr Stan - 07-03-2020, 07:37 PM
RE: Machining 4140 - by Cross Slide - 07-04-2020, 09:28 AM
RE: Machining 4140 - by EdK - 07-04-2020, 10:40 AM
RE: Machining 4140 - by Cross Slide - 07-04-2020, 10:58 AM
RE: Machining 4140 - by f350ca - 07-04-2020, 06:24 PM
RE: Machining 4140 - by Dr Stan - 07-04-2020, 08:42 PM
RE: Machining 4140 - by Cross Slide - 07-04-2020, 10:49 PM
RE: Machining 4140 - by Cross Slide - 07-04-2020, 10:54 PM
RE: Machining 4140 - by EdK - 07-04-2020, 11:01 PM
RE: Machining 4140 - by Cross Slide - 07-04-2020, 11:07 PM
RE: Machining 4140 - by Pete O - 07-05-2020, 05:53 AM
RE: Machining 4140 - by Cross Slide - 07-05-2020, 11:09 AM



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