kkrace wrote:
I had some Harbor Freight gift cards I cashed in on the composite bodied 3/4 Earthquake impact gun. Best $200 I ever spent. I've done a few Honda harmonic balancer bolts with it and some other stuff I couldn't get loose with my 1/2 inch gun. I think its rated at 1700 ft lbs. I've named it Bubba! Bubba seems to be able to get everything loose.
I do not think that it is entirely about ft lbs. I think that the sequence of discrete impulses break up chemical bonds that hold things stuck. As I said in my post, sometimes it takes my 3/4" impulse driver what seams like a minute sometimes to my my spinor spin. It just goes bang, bang, .... bang ... bang and finally a low roar and you have to be careful least you have the spinor spin across the garage or into the car. I fully believe that it is the impacts that matter. If you try to use a bar with a 10 foot pipe extension you will just damage what you are trying to remove. You do not break the chemical bonds this way.
Once I was removing the rear section of the exhaust on my car. I was replacing entire sections, muffler and all.
I removed the driver's side by banging on the muffler with a heavy hammer. I could not remove the passenger side this way. What I was trying to disconnect was the joint where a pipe slipped into a slightly larger pipe. Since I live in a town full of artists, I when down to the pottery place and got a section of 1 inch thick insulation for a potting oven. I then had a little mat gas flame thing that I played on this joint with the insulation keeping the car from catching on fire. The joint was heated, but not enough that it became even slightly red. After it cooled, it was easy to remove with a few bangs on the muffler and the pipe came right off. The heat had expanded the joint enough for the chemical bonds to break.