Either mislabled or mis-made, it isn't correct for the application that it's labeled for.
My dad wanted the same part for his SM, and went to a somewhat local IH only place. They brought out a new Almost &Incorrect one sealed in the plastic pakage. The situation was the same you're experiencing. They told him to just have the keyway recut to match the old one. For 20 bucks less than they wanted for the wrong part (not counting what the cost of recutting the misplaced keyway would have cost), he had a machine shop make him a shaft.
The new shaft from would have never allowed the brake linkages to function and/or adjust correctly on dad's tractor without reworking the keyway. I'm pretty sure the length was a little off, too. That shaft probably fits something. It wouldn't work on dad's Stage II Super M.
Find a local machine shop. They can either build yours up and turn it back down, or just make you a new one. They aren't exceptionally hard or any special steel. You probably could get it heat treated if you really wanted to, but the last one survived roughly 60 years.
This post was edited by AG in IN at 06:44:58 02/22/13.
Fast Shipping! Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.