Any salesman is going to tell you what you want to hear to sell their product…
While I don’t know much about a cheese hog, I do know that we’ve used a pelican head to shred endless cases of cheese for almost 50 years. We still have our original Hobart mixer. I’m no physics wizard, but I would guess that mixing a batch of dough puts way more “stress” on the gears than grading cheese. I’ve actually seen two shafts break from dough. Talk about torque. You’d think the brass gear would have failed first since it’s designed to be the fail point, but nope. They all look great even today.
As long as you’re in the right gears your mixer gears shouldn’t really fail if maintained properly. At least with my experience. I’m sure Tom or George might have more experience with seeing these things fail, but our 3 Hobart’s are as strong as bulls.
That said. Grading a large quantity of cheese on a mixer using a pelican head sucks. It just seems like an “outdated” method to grade cheese. We’ve since switched to a Hobart vertical cutter/mixer. There are other tools out there that are “easier” to use for sure.