heavy duty thread zigzag sewing machine

1. It is excellent choice for modern sail loft , for straight and zigzag stitch operations in the production of large sails , storm sails, awnings, thick corner and heavy webbing reinforcement. 2. Standard supplied with puller for strong and steady feeding, 3different cams suitable for straight stitch, 2step 3step and 4step zigzag, and pneumatic the presser foot lift and pneumatic back tack, needle cooler and hook cooler 3. The extra long arm clearance of 800mm is very useful when sewing larger items. A high foot lifter up to 20mm allows for heavy & bulky materials, such as sail tent and marquees and tarpaulins.