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(01-14-2013, 03:46 PM)PixMan Wrote: Expert schmexpert. I hardly know more than the next guy about anything, I just had read a lot on magazine articles while on the throne. ;)
You must be super regular Ken! Perhaps a few less visits to the Mexican restaurant in Spencer. Mind you, the food was very good.
Hunting American dentists since 2015.
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Ed:
If you need the strength of 4140, use "normalized" stock from a reputable supplier. It's harder than annealed, and turns better. Our shop used to buy 4140 "Pre-Hard", about RC35, and it turned nicely on a 12x36 grizzly with carbide, wet or dry. Just my $.02(that's tuppence for you guys that play with crickets!)
Regards,
Bob
bobm4360, proud to be a member of MetalworkingFun since Jul 2012.
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(01-18-2013, 12:26 AM)bobm4360 Wrote: Ed:
If you need the strength of 4140, use "normalized" stock from a reputable supplier. It's harder than annealed, and turns better. Our shop used to buy 4140 "Pre-Hard", about RC35, and it turned nicely on a 12x36 grizzly with carbide, wet or dry. Just my $.02(that's tuppence for you guys that play with crickets!)
Regards,
Bob
Bob,
I don't NEED the strength of 4140 for the project I'm working on. I just chose to use it because I'd heard that it machines nicely and I've never machined any before so wanted the experience.
So there's annealed, normalized and pre-hard 4140? I've never seen normalized for sale at any of the online metal suppliers but I'll take another look. Thanks for the information Bob.
Ed
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Just ordered some 2 1/2 annealed to build a shaft on a log skidder. Will get a photo of the finish for you.
Free advice is worth exactly what you payed for it.
Greg
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(01-18-2013, 08:42 PM)f350ca Wrote: Just ordered some 2 1/2 annealed to build a shaft on a log skidder. Will get a photo of the finish for you.
Greg,
That would be wonderful. Thanks man!
Ed
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I'd be happy to run some tests for photos and videos, but all I have is 1" square shank negative rake tooling, so you guys probably wouldn't get much benefit from that.
No 4140 rounds here either, just some 1117 and my 4140 is all square block drops from Burgon Tool Steel Co.