Needles break for four reasons, and three of them are things you can stop doing today.
Pulling the fabric. The commonest cause by far. If you guide the fabric faster than the feed dogs move it, the needle is levered sideways in the hole and snaps. Let the machine feed and only steer.
Wrong needle for the fabric. An 80/12 attempting a folded denim hem will deflect off the layers and break. Use a 110/18 jeans needle for denim, and slow right down at the hem.
Hitting something. A pin, a zip tooth, or the presser foot itself if the stitch width is wider than the needle hole. This last one catches people with twin needles: a 4 mm twin needle in a machine set to a 5 mm zigzag width will hit the plate on the first stitch.
Needle not seated properly. Pushed not quite fully up into the clamp, or fitted the wrong way round. Both put the eye in the wrong plane relative to the hook.
Only after those consider the machine — a burr on the plate or timing out of adjustment. If breaks continue with a new correctly fitted needle, correct fabric handling and no obstruction, that is a workshop question.
Questions people actually ask
It breaks at the jean hem every time.
That fold can be eight layers, and the presser foot tips as it climbs so the needle enters at an angle. Use a jeans needle, crawl, and level the foot with a folded scrap or a hump jumper.
Can a bent needle damage the machine?
It can strike the hook and damage the timing, which is a workshop repair. That is why you change a needle the moment you suspect it rather than finishing the seam.
Last reviewed 2026-08-11