A farmer friend of mine came by and asked if I could harden a bolt for him that is used as a pin in a mowing machine. These bolts tend to wear rapidly even when using a grade 8 bolt. I am not sure what material is used for a grade 8 bolt but I was thinking maybe I could harden one of these (3/4" bolt BTW) with the "Cherry Red" compound I got recently and hopefully not reduce it's shear strength too much. The hole through the parts the bolt fits has work hardened and appears to be wearing very little but the bolt wears fairly rapidly and then shears when it gets reduced to about 50% or 60% of it's original size. A hardened pin could be used I guess with some modification but in this case a bolt with a nut is the ideal set-up if we can solve or even just slow the wear process.