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What's a Hi Pro key?

R

Rich'sToys

Well-known Member
Location
Southern MN
Looking to replace a key in one of the gears on a New Idea corn picker. The original is gone. It appears to be just a 1/4" square key about 2" long. I looked it up in the parts book and they describe it as a "No. 27 Hi Pro key, (HP 1708 B) 1/4" thick x 1 15/16" long".
What does all that mean? Is there something special about it, like maybe hardened or something? My Agco dealer had no idea. Before I just put regular key stock in it I thought I'd check to see if anyone else was familiar with this term. Thanks!
 
Quick search indicates that Hi Pro is for high profile. The shape is said to have feet that allow quicker install in assembly lines and better seating when installed. There is no claim or special alloys or treatment that would make them superior to any other key. Of course this comes from the inter-web so who knows how credible it is but it did come from a supplier's site.
 

Well, I learned something today, I always wondered what those were called!
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