Sewing Machine Motor Pulley M40 Industrial Sewing Machine Motor Pulley. Need Help or Advice? Unsure of exactly what you need? Or can’t see your parts here? Please call one of our Engineers who will be delighted to help. Part No M40 40 mm is the diameter of the distance from edge to edge of the pulley. Motor Pulley can be replaced like for like. Or change the size to speed up or slow down the sewing machine speed. 15 mm shaft straight bore
