thanks metengr
the specs fall in line with my sources here.
they tell me the 321-363HBN of the en 30b is RC 35-39
the 4340 320-350HBN is RC 34-37
so the en30B core I had tested that comes in at RC 34 I'm sure will do the job
well the en30b has rockwell of 34. The supposed core from some 4xxx material does not read any rockwell number, some insignificant brunnell # though. thanks for the assistance and lesson learned for me. I am sure the en30b will be fine
If i bend that Oh well try something else
you are correct, normally i buy from a known reputable source. this product came as a gift with the assurance of what it was supposed to be.
I am currently having the two pieces hardness tested.
I will post those numbers when I have them
after some investigation turns out the material was a core from some 4xxx type We didn't know it would be softer than
the od it came from. apparently a core cut from en30b does not suffer the same losses strength wise. True?
thanks for any help
i have been using 4140 and 4340 materials in 30 mm diameter
and they consistently bend and the bearing is trying to push through the shaft. I have built one now from en30b
but have yet to use it. Will this work in its raw state or would some heat treating improve it for this application?
