61321676_salients.pdf

This document is a Salient Characteristics specification for an Extra Heavy Duty Long Arm Sewing Machine. The machine must be a 36-inch long arm, single needle, drop feed sewing machine with alternating presser feet and lockstitch capability, designed specifically for oversized, bulky items requiring extended workspace.

The sewing machine must accommodate extra heavy materials including Cordura, Dyneema, and webbing up to 18,000 lb strength and Tex 556 cord thread. Primary applications include manufacturing safety and logging belts, cargo slings, tents, sails, tarpaulins, fabric structures, construction barriers, buffing wheels, parachutes, balloons, industrial bags, boot stitching, and heavy duty harnesses. Key features include synchronized upper and lower feeding mechanisms with alternating presser feet and two-row feeder for uniform stitching on bulky materials; an extra-large, long beak oscillating shuttle hook and bobbin to accommodate very thick thread; hand or foot-operated reverse stitching, stitch regulation, and presser foot lift; and durability construction with steel insert for take-up hinge and belt guard. Technical specifications require 550 stitches per minute maximum speed, 2 stitches per inch maximum stitch length, presser foot clearance of 1-1/4" to 1-11/32", 2-3/32" needle bar stroke, 10" x 26-1/4" bed size, and an oscillating shuttle hook. The machine must be supplied with table, legs, and a heavy-duty servo motor (550W/750W/1000W) for precise control and variable speed management.