Quote Originally Posted by Ah Pook View Post
It didn't look like the chain came off the sprocket. I wonder if the added tension shortened the bar length. How much holding force are the two bolts designed to hold?
Maybe the chain did remain on the sprocket but that is about the loosest (is that a word?) I have ever seen a chain. You could be right that the two nuts may have just lost their tension and allowed the bar to move back. I have been cutting my firewood for about 34 years have never had/used chaps but I can now see a huge safety advantage of wearing them.