The Singer 301 doesn't like to sew heavier things, its just not meant to do heavier fabrics constantly; an industrial machine might be a better choice.
I use my 1917 White Rotary treadle for stuff like that, it will sew through just about anything I can put under the foot. I made several dog bed covers from old blue jeans and my treadle sewed through the heavy seams like it was nothing. My hubby was watching and was impressed.
Sharon in Texas
Last edited by purplefiend; 02-04-2017 at 04:45 AM.