Juki Union Special 63900 Series Needle-Feed Cylinderbed Lockstitch Machines These needle-feed machines with gear driven top and bottom roller feed are the answer to high production and consistent high quality stitching on today's most hard-to-handle materials. In addition to positive, precise feed control of the material, the unique cylinder design of the sewing area greatly improves garment handling. Ideal for hemming bottoms of jeans and top stitching trouser waistbands. These machines feature a higher needle bar lift for crossing bulky seams.