This compound-feed heavy duty lockstitch industrial sewing machine is equipped with unison feed machanism and vertical-axis double capacity hook, with safety clutch for preventing hook breakage.

The unison feed system combines the upper and botton feeding machadism, needle feed machadism and the presser foot feeding together, which ensures the fluent sewing for heavy duty and extra heavy-duty.

This machine has two presser feet together, a smaller one inside and a bigger one outside.

With automatic lubrication system for longer life and clean stitching during operation.

It is suitable for sewing heavy materials,such as cars seats,sofas, bags,etc.  And up to now, it is the model which used in sofa and car seat production mostly