Shop a selection of heavy duty and commercial-grade sewing machines at Grainger. Heavy-duty sewing machines feature a powerful motor and extra-high sewing speed. They allow you to sew up 1,100-stitches per minute. Commercial-grade machines are suitable for tailors, seamstresses, fashion designers, dry cleaners, and industrial sewers. They feature an industrial grade motor that can sew up to 4,000 stitches per minute.