Replacing a gear in Singer Stylist 457?

1965 Singer 275k sewing machine foot pedal?

Presser foot is loose?

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

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

Engine revving up ?

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

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

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

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

Singer 507?

Bobbin won't wind?

Singer zigzag 457 Stylist not threading bobbin/making stitch?