I found a old Magneet Dutch bike with one cotter pin crank arm stuck. I went to Harbor Freight and bought the chain brake. Milled the tool very accurately. I then went to the crank arm. Sprayed it with wd-40 to loosen potential oxidation. Let it sit for an hour. I then heated the pin and arm with a Propane Torch. Let it cool. Then I started to use my Harbor Freight tool. I noticed a bit of tension nothing crazy, and as I continued to turn I heard a crack. I first thought it was the pin moving...and I looked further the tool was cracking severely on the corner. It took me an hour to mill this sucker and 5 min to break it. Flush $16 and time spent. I am in no way being aggressive with the tool or forcing anything. The Harbor Freight tool is just a piece of poo. Just my 2 cents. Now I am gonna borrow a real press from a bike buddy. Next time I will save my dollars and get a real press from: http://www.bikesmithdesign.com/CotterPress/
Happy Cotter Pin Pressing!!!!!!