How to Thread a Sewing Machine Correctly

Reviewed 30 October 2026.

If your sewing machine suddenly starts looping, snapping thread or making a nest underneath the fabric, check the threading before assuming the machine is faulty. A missed guide or take-up lever can cause a surprisingly large problem.

This guide covers the checks for a conventional sewing machine. Keep your exact model’s manual beside you: thread routes, needle direction, bobbins and starting procedures vary. Overlockers and coverstitch machines need their own threading instructions.

Before you start

• Use a suitable sewing thread, the correct bobbin for the machine and an appropriate needle for the fabric and thread.
• Check that the needle is straight, undamaged, fully inserted and facing the direction shown in your manual.
• Prepare an offcut of the same fabric and layers for a test seam.

In the shop, we often see tension problems caused by unsuitable thread. Overlocker thread can differ in stretch and construction, leading to inconsistent tension, snapping and tangling when used for an unsuitable sewing task. Poor-quality thread can also leave fibres and oily residue in the machine. Our guide to choosing sewing and embroidery thread explains why we recommend thread intended for the job.

How to thread the upper thread

1. Raise the presser foot. On conventional domestic machines this releases the upper tension discs so the thread can seat between them. Lowering the foot for sewing allows them to control the thread.
2. Raise the needle and take-up lever to their threading position. Follow the manual’s instructions for the handwheel or needle-position button. A needle that has just come out of the fabric may not yet be at the correct threading position. Switch the machine off before working around the needle.
3. Fit the spool correctly. Use the spool position and cap specified for your machine. Check that the thread is not catching on the spool or a storage notch. A large cone needs a suitable feed arrangement rather than being forced onto an unsuitable pin.
4. Follow the complete upper thread path. Use every numbered guide and the tension path shown in the manual, including any check spring. Guide the thread gently; do not force it through or dismantle the tension assembly.
5. Engage the take-up lever. This is an essential part of the path. Follow the indicated route through its eye or slot, then continue through the remaining guides, including the guide near the needle bar.
6. Thread the needle as specified for your model. Do not assume every machine threads front to back. If using a built-in threader, check its needle-position, needle-size and thread restrictions.
7. Leave the required thread tail. Arrange it through or under the presser foot as the manual shows. Thread passes through the needle’s eye; it is not tucked into the needle clamp.

Wind and insert the bobbin correctly

Use the bobbin type specified for the machine. Similar-looking bobbins can differ in dimensions or construction. Follow the separate bobbin-winding path in the manual, including its guide or tension disc. Wind evenly and do not overfill; complete the model’s steps for returning from winding to sewing.

Top-loading and removable bobbin cases

Top-loading: switch off as directed, raise the needle and remove the cover. Insert the bobbin in the illustrated unwinding direction. Take the thread through the indicated slit, guide and tension path before using any built-in cutter and replacing the cover. Simply dropping the bobbin in and closing the lid misses an important step.

Removable bobbin case: fit the bobbin in the direction shown for that case, then draw the thread through its slot and under the tension spring as instructed. Refit the case in its correct position and confirm that it is seated. Do not assume its thread direction matches a top-loading machine.

Do not start turning the bobbin-case tension screw to compensate for a threading problem. Check the threading first.

Do I need to bring the bobbin thread up?

Some quick-set systems let you start without drawing up the bobbin thread by hand; other models or techniques require it. Follow your manual.

Where drawing it up is required, hold the upper thread lightly and operate the handwheel in the specified direction to lower and raise the needle through its cycle. Gently draw the upper thread to bring up the bobbin loop, then arrange both tails as instructed. Never force a handwheel that will not turn freely.

Why does the needle unthread when I start?

Check the starting tail length, needle and take-up lever position, and whether your model asks you to hold the tails for the first stitches. Also check the spool feed, needle orientation and complete upper thread path. Pulling on a tail to restrain the machine is not a solution.

What if thread bunches underneath?

A tangle underneath does not prove the bobbin is at fault. Remove the work carefully using the manual’s jam-clearing instructions, then rethread the upper path with the foot raised and the take-up lever correctly positioned. Check the bobbin’s seating and thread path, suitable thread, needle and accessible lint.

Return to the model’s recommended starting settings and test with the presser foot lowered. There is no universal starting tension number for every machine. Only adjust tension after checking the threading and materials, and make any permitted adjustments gradually on a test piece.

Stop if thread repeatedly snaps, tangles or jams. Continuing can pull more thread into the mechanism and cause further problems or damage. Switch off before clearing accessible thread or cleaning as described in the manual. If it still will not sew correctly, contact Fabric Mouse with the model, thread details and photographs of both sides of the stitching.

Quick threading questions

Should the presser foot be up for threading?

For conventional domestic machines, raise it for upper threading so the thread can enter the tension discs. Lower it before sewing. Follow any model-specific procedure in your manual.

Do all machines use the same bobbin direction?

No. Use the diagram for your exact machine or bobbin case, and follow its tension path rather than copying a different model.

Can better thread help?

Suitable, good-quality thread is part of the setup. If problems began with a change of thread, try an appropriate sewing thread and rethread both upper and bobbin paths before assuming the machine needs repair. Browse our sewing threads or ask us for help choosing.