How can I replace the top vertical gear on this model?

Singer zigzag 457 Stylist not threading bobbin/making stitch?

how to get the tension right on my machine?

Engine revving up ?

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

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

Bobbin won't wind?

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

1965 Singer 275k sewing machine foot pedal?

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

Presser foot is loose?

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

Singer 507?