I have a couple of older chainsaws (David Bradley and Homelite) that still use 1/2 inch pitch (round filed) chain. I managed to find a couple of N.O.S. chain loops for primary cutting use, and I have a couple of well worn loops for backup. The cutters on the worn loops have been ground back to where they are only about 1/3 as long as the
cutters on the newer chains, but I have maintained the 35 deg. filing angle and the .030 depth gauge setting. The problem is that the worn chains don't cut worth a crap, even with sharp cutters. I read somewhere that you could make them cut better by filing at a steeper angle, and I read somewhere else that lowering the depth gauges would help. My question is....does anyone have experience at making these large pitch chains cut better when the cutters have been ground back considerably? I hate to scrap these no-longer-available chain loops when the drive links, rivets, and tie straps are still good. BTW my neighbor's McCulloch 1-42 with 7/16 pitch chain has the same problem with his one and only chain loop.