Why Does My Bobbin Thread Keep Breaking? Check Winding, Seating and Lower-Path Damage
Repeated bobbin-thread breakage is best diagnosed from the lower thread path first, not by immediately changing upper tension. The useful sequence is to prove which thread snapped, inspect the installed bobbin and remaining tail, confirm winding quality and exact bobbin type, verify insertion, and clean only the areas the machine manual makes owner-accessible. A scratched,