I agree - SS is pretty soft. You could go to a fabrication shop that does hydraulic work - They will have good quality steel rod that has a hard chrome finish on it. While the chrome is pretty thin, the steel should be of a high quality and a precise size.
Stainless tends to be more susceptible to galling than regular steel but some of the air hardening 400 series are pretty wear resistant when hardened. If you use a machine shop they seem to prefer the air hardening steels.
If it's a greased pin rust should not be a problem. W-1 drill rod is pretty inexpensive and easy to harden and temper yourself if you want to make your own hard pins.
Really though 1-1/4 is a pretty stout pin and mild steel is probably all you need.
Not trying to highjack but does anyone know what kind of stainless might be used for the shaft in large verticle turbine pumps. I would think it has to be stronger than normal 304,308, or 316 because these pump shafts are 20' long (w/ threaded couplings between 8' sections) with 10 turbines being turned to supply over 170psi water to water towers so there is quite a bit of twisting force to make that kind of preasure.
As I have a decent amount I was thinking the same thing(pins for my blade I'm working on)
massey184ferguson if you were around the Kansas area I could hook ya up with some as we demo-ed out 4 large pumps and I stripped out all the shafting before it got thrown in the dumpster.
(man I'm a pac-rat:confused3
I use cold rolled steel for shafts and pins. It is true diameter all around end to end and stronger than mild steel. You can get it both inch and metric sizes on Amazon. Strength; mild or cold rolled at 1 1/4" is way stronger than your tractor can produce in stress. The other comments are right on about SS. Even some SS alloys will rust. Amazon link: [URL http://www.amazon.com/s/ref=nb_sb_n...as=aps&field-keywords=cold rolled steel shaft
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Ron