How to Thread a Sewing Machine & Other Sewing Tips & Fixes
If your thread’s just snapped for the third time or your machine’s locked up mid-seam, you’re probably wondering what you did wrong.
The good news is that the cause is likely nothing to do with you. Most sewing machine jams come down to one of a handful of fixable causes. Whether you’re just learning how to sew or you’ve been running a home-based alterations business for years, here’s the fix.
We cover how to thread a sewing machine properly, the real reasons why your sewing machine keeps jamming even when you’re sure you’ve done everything right, and how to tell if it’s time for a new machine.
How to Thread a Sewing Machine
Every sewing machine in NZ has its own quirks, but the process is the same four steps across almost every brand.
1. Wind and Insert the Bobbin
Pop an empty bobbin onto the winding spindle, wrap thread around it a few times by hand, then run the machine until it's fully and evenly wound. An unevenly wound bobbin, with thread piled up on one side, is one of the sneakiest causes of jamming later on.
2. Thread the Upper Mechanism
Follow the numbered guide printed on your machine (nearly every model has one) and take the thread through every tension disc and hook along the way. Skipping a guide is the single biggest threading mistake we see. The thread might look threaded from the outside, but if it's bypassed the tension discs, your stitches will be a mess.
3. Thread the Needle
Bring the needle to its highest position first. Thread from front to back, and if your eyes or hands aren't what they used to be, a needle threader tool will save you a lot of squinting and swearing.
4. Bring Up the Bobbin Thread
Hold the top thread lightly, turn the handwheel towards you one full rotation, and you'll feel the bobbin thread catch. Gently pull the top thread, and the bobbin thread will loop up to the surface with it. Both threads should sit under the presser foot, pointing away from you, before you start sewing.
Quick Sewing Tips to Stop Jams Before They Start
- If a stitch looks wrong, don't try to fix it mid-thread. Cut both threads and start again; it's usually faster.
- Test on a scrap of your actual fabric first. Tension that's perfect for cotton can be all wrong for stretch fabric.
- Keep top and bobbin thread the same weight. A heavy top thread with a thin bobbin thread is a classic recipe for tension problems.
Why Does My Sewing Machine Keep Jamming?
If you’ve threaded your sewing machine properly but it keeps jamming, there’s almost always a reason.
Threading or Tension Errors
This causes most jams, by a wide margin. If your top thread hasn't gone through the tension discs properly, or your bobbin's sitting in its case the wrong way round, uneven tension snowballs into a full jam within a few stitches.
Wrong Needle for the Fabric
A universal needle struggles on denim, and a sharp needle drags on knits. If you're switching between garment repairs, quilting cotton, and stretch fabric, switch needles too. The wrong needle doesn't just skip stitches; it can bend enough to jam the whole mechanism.
Dirty or Lint-Packed Bobbin Case
Every few projects, lint builds up around the bobbin case and feed dogs. It's easy to forget and just as easy to fix: a small brush and two minutes usually sorts it, before that lint starts interfering with the bobbin's movement.
Old, Bent, or Wrong-Way Needles
Needles are consumable, not permanent. A needle that's slightly bent, blunt, or inserted the wrong way round (the flat side needs to face the right direction for your machine) will catch on the thread and jam.
Fix It or Replace It?
If you’ve worked through all of the above and your sewing machine is still jamming, the problem might be inside the machine itself. Before you book a repair or start browsing new machines, it's worth a quick gut check. How old is the machine, how often do you use it, and is this the first repair it needs, or the fourth?
A machine needing its second or third repair in a year usually isn't worth the ongoing cost, especially if it was a budget model to start with. One that's had a single issue after years of solid use is almost always worth fixing.
From worn tension springs to a feed dog that’s no longer sitting flush, these signs signal the need for a technician’s attention rather than a DIY fix from a YouTube tutorial.
If you're not sure which camp yours falls into, our technicians can take a look and give you an honest answer, not just a quote.
What Sewing Machine Should I Buy?
If repair isn’t the answer, here’s what you should consider when you’re choosing a replacement.
Mechnical vs Computerised
Mechanical machines are simple, reliable, and easy to maintain, a solid choice if you want something that just works with minimal fuss. Computerised machines add automated features like needle positioning and thread cutting, plus a wider stitch library for detailed or decorative work.
Neither is objectively better; it depends on what you're making.
Match the Machine to What You Sew
Someone doing occasional repairs needs a very different machine to someone running a home-based dressmaking business eight hours a day. Think about your current projects, but also where you'll be in two or three years. A machine that only just covers today's needs usually means buying again sooner than you'd like.
Look for Serviceability, Not Just a Low Price
A cheap machine that breaks down every few months isn't actually cheap. Look for a brand with genuine parts available and technicians who know how to service it properly.
That's why we stock Juki sewing machines: their household range brings industrial-grade reliability to a domestic machine, and it's built to run well in ten years, not two.
A Few Questions to Ask Yourself Before You Buy
- What's your realistic budget, and what's the true cost of a cheaper machine that needs replacing sooner?
- How often will you actually use it: occasional hobby projects, or regular sewing for beginners' garments and repairs, right through to daily commercial use?
- What fabrics do you sew most: quilting cotton, dressmaking fabric, denim, stretch knits?
- Will you want to grow into buttonholes, decorative stitches, or embroidery down the track?
Talk to a Sewing Specialist
If you’ve worked through this guide and you’re still facing common sewing machine problems, suspect it’s time to retire your current machine, or can’t decide on what sewing machine to buy, our team can help. We work with hobbyists, home-based sewers, and commercial operators across New Zealand, and we’re happy to talk through what you actually need before you spend a cent.
Call us on 0800 541 691, visit our Auckland or Christchurch showroom, or browse our range of domestic sewing machines to find the right fit.
