Singer Sewing Machine No. 31-15 User Instructions

Complete user manual and repair reference for the Singer Sewing Machine Model No. 31-15, featuring an oscillating shuttle lock stitch mechanism. This original January 1916 instruction booklet delivers authoritative guidance for operating and maintaining this robust domestic sewing machine designed for stitching clothing, cloaks, suits, skirts, and shirts. The manual provides machine specifications including a maximum speed of 2200 stitches per minute, detailed needle selection and sizing guidance tailored to different fabric types from delicate silks through heavy woolens, and step-by-step threading instructions for both bobbin case and needle. You'll find practical sections on bobbin removal and winding, proper thread twist determination, and operational techniques to achieve perfect stitch formation. The manual emphasizes the critical role of genuine Singer machine oil in maintaining performance and longevity. Specific needle classifications are cross-referenced with corresponding thread weights and fabric recommendations to help you select appropriate supplies for each project. Additional sections cover sourcing replacement parts and needles through Singer authorized dealers and mail order, making this an essential reference for owners and technicians servicing this classic model.