Small Engines (Lawn Mowers, etc.): Wood Chipper, die grinder, cutting torch

Question
Hi Eric! I would like to ask a question regarding a woodchipper. I recently purchased one secondhand that was running VERY smoothly but not chipping. I pull it apart to find the blades of the chipper dull. My 2 questions would be.. I have a bolt on the shredder blade that is specified to be torqued to 700 in pounds. I can not for the life of me get this bolt of! I have tried brute force, heating the bolt with a torch, pb blaster...after all these attempts I once again tried brute force and broke the SOCKET SET itself... I am not sure what else to try to get this thing loose! SO my first question is, How should I get this stubborn bolt loose? And my second question is, How sharp should a chipper blade be? My manual says to follow the factory edge bevel, So should it be sharp enough to cut my skin? Thanks!

Answer
Did you use a cutting torch or propane to heat the bolt?

Is there a nut on one side of the bolt you can access? If there is a nut you can try using a nut cracker that just splits the nut in half.

Can you get a die grinder in the area to cut the bolt off?  

As far sharpening, the sharper the better sounds like a good answer.  However, the thinner the edge of the cutting blade the quicker it will dull and it will be easier to chip the cutting side of the blade.

I would touch up the cutters so they are pretty smooth and sharp but try and keep the factory angle.  45 degrees would be the steepest angle I would grind so the there is more steel on the cutting line of the blade.

Do you have a picture of the bolt you can't get loose?

Eric