cannot seem to get the black bobbin case back into?

Singer zigzag 457 Stylist not threading bobbin/making stitch?

What size needles can I use for my Singer 39a3?

Engine revving up ?

Bobbin won't wind?

the thread is bunching on underside of fabric it looks like birdnest?

1965 Singer 275k sewing machine foot pedal?

Need an equivalent to an old Hunts WA71 capacitor/rectifier?

Need a service manual for a Singer Treadle Sewing Machine Model 66-1?

Singer 507?

Presser foot is loose?

Singer 201 went bang , smelt and now won’t work?

My CG 500/550 Singer Sewing Machine's bobbin isn't working?