Oscillating Shaft for the Sailrite^® Ultrafeed^®. Specially made exclusively for Sailrite, the Ultrafeed Oscillating Shaft features thicker, more substantial forks than your average machine’s oscillating shaft to eliminate breakage. This piece fits both the Ultrafeed LS and LSZ Sewing Machine models, as well as the Yachtsman and Stitch Master^® Sewing Machines.