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GKman
02-27-2008, 12:18 PM
Need to order some steel from Speedymetals to make a couple of shafts. First is for a farm store drill press. Has some threads, two pressed on shielded bearings, splines, and a MT3 socket. About 1" X 12". The other is about the same size is a spindle for an old Dumore toolpost grinder. Two press on shielded bearings shoulders and threads both ends also 1" X 12". Want steel that is strong yet machinable with out heat treating. Which would serve me better A2, 1045, 1117 or 1215? A2 @ $14.00/ft over $4.75 for the others doesn't bother me if there is any advantage. Not building any rocket ships for NASA but don't want to skimp on material as much labor is involved.

tattoomike68
02-27-2008, 12:26 PM
1144 stressproof machines like a dream but is tough stuff. I like using it.

lazlo
02-27-2008, 12:30 PM
What Mike said: Speedy carries a Stressproof (1144) clone, which is partially hardened (less than 4140 Pre-Hard, for example), but machines very nicely.

Oldbrock
02-27-2008, 12:37 PM
I would use 4340 for the grinder spindle, extremely fatigue resistant for cantilever shafts. Make sure any changes in dia. are stress relieved. slow finished radius. A sharp internal corner :eek: may cause a stress fracture.

Al Flipo
02-27-2008, 12:58 PM
Go with 1045, it's more than adequate.

SGW
02-27-2008, 02:20 PM
Another vote for 1144 -- it machines to a nice finish.

GKman
02-27-2008, 09:04 PM
Gentlemen, thank you for your input. Keep hearing good things about the 1144 stressproof. Will give it a try. Would have tried 4340 too but they don't have it.