# How to wind and insert a bobbin

Source: https://stitchandhem.co.uk/blog/how-to-wind-a-bobbin
Published: 2026-10-12
Publisher: Stitch and Hem

**In short:** Put the spool on its pin, lead the thread around the bobbin winding tension guide, wind a few turns onto an empty bobbin, push the bobbin winder shaft across and run the machine at a steady speed until it stops or the bobbin is full. Then insert the bobbin in the direction shown on your machine, pull the thread through the slot in the case and replace the cover.

The bobbin supplies the lower thread of every stitch, so a badly wound or wrongly inserted bobbin shows up straight away as loops, puckers or a nest of thread underneath. Winding takes under a minute once you know the routine, and inserting it correctly is mostly about which way the bobbin turns. This guide covers both, for top drop-in and front-loading machines, and explains how the bobbin and upper thread work together to make a stitch.

## How a sewing machine bobbin works

A lockstitch machine uses two threads. The upper thread comes from the spool through the needle, and the lower thread comes from the bobbin underneath the needle plate. As the needle goes down, a rotating or oscillating hook catches a loop of upper thread and carries it around the bobbin, locking the two threads together inside the fabric.

For that lock to sit neatly in the middle of the layers, the bobbin thread has to unwind smoothly under a light, steady tension. That is why an evenly wound bobbin and correct insertion matter as much as the upper threading. A lumpy bobbin, or one turning the wrong way, changes the tension and spoils the stitch.

## How to wind a bobbin evenly

The exact guide positions vary, so follow the bobbin winding diagram printed on top of your machine or in the manual. The general method on most domestic machines is the same.

1. Use an empty bobbin of the correct type for your machine. Do not wind new thread on top of old.
2. Place the spool on the spool pin with a suitable spool cap.
3. Lead the thread through the top guide and around the bobbin winding tension disc, usually a small round guide on the top of the machine.
4. Pass the thread end through the small hole in the bobbin from the inside out, or wind it clockwise by hand a few times, depending on your manual.
5. Put the bobbin on the winder shaft and push the shaft across to engage it. On many machines this disconnects the needle so it stays still.
6. Hold the thread end and run the machine at a steady medium speed. After a few turns, stop and trim the tail close to the bobbin.
7. Carry on until the bobbin fills or the winder stops automatically, then push the shaft back, cut the thread and remove the bobbin.

Note: Keep fingers clear of the winder while it turns. If the needle will not move after winding, check that the winder shaft has been pushed back to the sewing position.

## Signs of a badly wound bobbin

A good bobbin is firm and evenly layered from edge to edge. If the thread is soft and spongy, the winding tension guide was probably missed, and the bobbin will feed unevenly. If the thread is heaped up on one side, the thread path or guide may be out of place. In both cases it is quicker to unwind the bobbin and start again than to sew with it.

Do not overfill a bobbin. Thread bulging past the rims rubs against the bobbin case and adds drag. Most bobbin winders have an automatic stop that ends winding when the bobbin is full, but if yours does not, stop just short of the edge.

| Problem | Likely cause | Fix |
| --- | --- | --- |
| Loose, spongy bobbin | Bobbin winding tension guide missed | Unwind and rewind through the guide |
| Thread piled to one side | Thread path not seated correctly | Rethread the winding route |
| Thread slips at the start | Tail not held or threaded through the hole | Hold the tail for the first few turns |
| Needle does not move afterwards | Winder shaft still engaged | Push the shaft back to the sewing position |

Bobbin winding problems at a glance

## Drop-in against front-loading bobbins

Most modern beginner machines from brands such as Brother, Janome and Singer use a **top drop-in bobbin**. You slide back a clear cover in front of the needle, drop the bobbin into a fixed case, guide the thread through a slot and replace the cover. The clear window lets you see when the thread is running low, which helps if you are new to sewing.

Many older, mechanical and heavier duty machines use a **front-loading bobbin**. The bobbin goes into a separate metal bobbin case, which you then clip into the hook from the front, behind a small door below the free arm. Front-loading systems take a little more practice but are still common and work well. Check your manual for which system your machine has, and always use the bobbin type and size it specifies, because bobbins that look alike are not always interchangeable.

## Which way should the bobbin turn?

Direction matters because the bobbin case is shaped so the thread pulls through its tension spring correctly only one way. On most drop-in systems the bobbin goes in so that the thread unwinds anticlockwise when you look down at it, often drawn as a letter P shape. On most front-loading cases the thread pulls out so the bobbin turns clockwise as you pull, then the thread slides under the tension spring. These are common conventions, not universal rules, so follow the arrow diagram near the bobbin area or in your manual.

A simple check for drop-in machines: place the bobbin in, hold the thread and pull gently. The bobbin should turn smoothly in the direction of the diagram. Then guide the thread through the notch and along the slot until it is caught by the small cutter or guide, and replace the cover.

1. Switch off the machine and raise the needle and presser foot.
2. Open the bobbin cover or the front door.
3. Insert the bobbin so it turns in the direction shown on the machine.
4. Pull the thread through the slot and under the tension spring.
5. Replace the cover, then bring up the bobbin thread if your machine needs it.

[Compare beginner sewing machines](https://stitchandhem.co.uk/best/best-sewing-machines-for-beginners)

## Getting the most from your bobbins

Wind two or three bobbins before a project so you are not stopping mid seam. Use the same thread in the bobbin and the top for general sewing, as mixing heavy and light threads can unbalance tension. Keep spare bobbins in a box so they do not get scratched, since a nicked rim can snag thread. If you are choosing a machine, our guide to [the best sewing machines for beginners](https://stitchandhem.co.uk/best/best-sewing-machines-for-beginners) notes which use drop-in bobbins, and you can read about [threading the upper thread](https://stitchandhem.co.uk/blog/how-to-thread-a-sewing-machine) next.

## Frequently asked questions

**Are Brother sewing machine bobbins universal?** No. Brother, like other brands, uses specific bobbin types and sizes for different models. A bobbin that looks similar can be slightly taller or have different rims, which affects stitching. Check your manual for the exact type before buying spares.

**Can I use a different colour in the bobbin?** Yes, and it can be useful for testing tension. For finished work, a matching colour hides small tension differences. Keep the same thread weight on top and bottom unless your manual or project says otherwise.

**Why does my machine sew while winding the bobbin?** On many machines the needle stops while the winder is engaged, but some models keep the needle moving. Remove the fabric and raise the presser foot while winding, and check your manual for any clutch or disengage step.

**How full should a bobbin be?** Stop when the thread is just short of the rim, or let the automatic stop end the winding. An overfilled bobbin rubs inside the case and can cause uneven stitches.

## Buying guides on this topic

- https://stitchandhem.co.uk/best/best-sewing-machines-for-beginners
- https://stitchandhem.co.uk/best/brother-sewing-machines-compared
- https://stitchandhem.co.uk/best/best-computerised-sewing-machines