Thanks for the advice Metalman. I'll stick with the 4140 for the arbor, but would like to try the 17-7 PH stainless for some smaller parts that I can harden. One last question, what's the best way to prevent scaling and decarbonization of the 17-7PH during heating? I've seen a product called...
No, I could never machine 52Rc. My question is whether prehardened 4140 comes with a hardness of 28 to 32Rc, and since I don't have the facility to harden a 12" length, would prehardened 4140 at 28-32Rc be acceptable to use as a milling arbor? Thanks again.
Thanks for the response Metalguy. The diameter of the arbor would be 1 1/4" by 12" long. I believe the hardness of commercially sold arbors is about 52C on the Rockwell scale. My interest in prehardened 4140 is that I do not have the means to harden a 12" piece, and was under...
I have two such mills, unfortunately they are no longer made, but may be found on Ebay. One is a Benchmaster, which converts from vertical to horizontal milling. The second is an Atlas MFC model, which is a horizontal mill. Both are excellent and were made in the good old USA. Hope this helps.
Hi Folks,
I'm planning on making a small milling machine arbor and would appreciate input as to the best steel to use. I'm presently leaning toward prehardened 4140, but really need some expert advice. Thanks in advance.
