Long-lasting seams
Designed for seams that need to withstand regular wear, laundering and strain.
Madeira Aerolock 125 · Premium overlocker thread
Strong, smooth thread for tidy seams that keep performing
Madeira Aerolock 125 is a premium 100% core-spun polyester thread for sewing, overlock and coverlock machines. Its combination of strength and flexibility helps create durable, clean seams, while the generous 2500m Kingspool suits everyday garment construction and larger projects.
- Durable core-spun construction for seams exposed to repeated washing and strain.
- Smooth machine performance across sewing, overlock and coverlock applications.
- 33 useful colours with matching cone images for easier selection.
No. 125dtex 135 × 2
2500mper Kingspool
100%core-spun polyester
33solid colours
This listing is for one 2500m cone in the colour you select. It is not a multi-cone overlocker set. If your project needs the same colour on several thread paths, order the number of cones required by your machine and stitch.
Engineered for hard-working seams
Aerolock wraps a fibrous outer layer around strong continuous filaments. This core-spun construction helps the thread remain tear-resistant while retaining the smooth, flexible handling needed for balanced overlock and coverlock stitches.
Clean stitch formation
Consistent thread construction supports smooth feeding and neat, dependable stitches.
Machine versatility
Suitable for sewing machines as well as overlock and coverlock machines.
Use Aerolock throughout everyday garment making
Overlocked seams
Use in needle and looper paths for sturdy, balanced seams and cleanly finished fabric edges.
Coverstitching
A practical thread for coverlock needles and loopers where strength and a tidy finish are priorities.
Standard machine sewing
Madeira also approves Aerolock for sewing machines, making the thread useful beyond the overlocker.
Colour-coordinated finishes
Choose a close match for discreet seams or a contrasting shade to make decorative overlocking visible.
Aerolock and Aeroflock are different threads. Aerolock 125 is a strong core-spun construction thread. Aeroflock is a soft, bulky looper thread chosen when softness, stretch or decorative coverage is the goal.
Choose from 33 Aerolock shades
Select the colour number and name from the product options above. The individual cone images and names below match the current live listing.
8000BlackSolid colour
8010WhiteSolid colour
8020Natural WhiteSolid colour
8100Grey (Pearl)Solid colour
8111CarbonSolid colour
8201SalmonSolid colour
8320Lavender (Petunia)Solid colour
8420Blue (Navy)Solid colour
8500Green (Emerald)Solid colour
8700GoldSolid colour
8730Blue (Aquamarine)Solid colour
8785BurgundySolid colour
8821SandSolid colour
8890Teal (Dark)Solid colour
8934Pale BlueSolid colour
8941Blue (Sky)Solid colour
8971TealSolid colour
8990Green (Apple)Solid colour
9130Purple (Lavender)Solid colour
9160Pink (Magnolia)Solid colour
9280BrownSolid colour
9290Brown (Chocolate)Solid colour
9320Blue (Baby)Solid colour
9360Yellow (Canary)Solid colour
9470Red (Ruby)Solid colour
9490BeigeSolid colour
9660Blue (Royal)Solid colour
9735Brown (Hazelnut)Solid colour
9892Blue (Turquoise)Solid colour
9915Pink (Baby)Solid colour
9917Pink (Flamingo)Solid colour
9919MauveSolid colour
9984Pink (Begonia)Solid colour
Screen colour is a guide only. Displays and lighting can change how thread appears. Match by the Madeira colour number and use a physical colour card or thread sample when an exact match matters.
Thread, test and balance before sewing the garment
Choose enough cones
Check how many needle and looper paths the selected stitch uses, then order the quantity required.
Fit an NM 75–80 needle
Madeira recommends a universal sewing needle in size NM 75–80, including article 9455.
Thread in sequence
Follow the machine manual’s path and threading order, ensuring each thread passes through its tension system.
Test and rebalance
Sew a folded fabric offcut, then adjust tension, differential feed and stitch settings for the project.
Keep the thread path clean and the cone protected
Store clean and dry
Keep unused cones covered and away from dust, direct sunlight, heat and damp conditions.
Clean the overlocker
Remove lint from the machine regularly and follow its manual for safe cleaning and oiling instructions.
Test laundering
When the finished appearance matters, wash a stitched sample using the planned fabric and care process.
Madeira Aerolock 125 at a glance
| Brand | Madeira |
|---|---|
| Product | Aerolock 125 premium overlocker thread |
| Manufacturer article | 9128 |
| Thread size | No. 125 · dtex 135 × 2 |
| Fibre | 100% polyester core spun |
| Cone length | 2500m |
| Make-up | Kingspool |
| Primary use | Overlocking and durable seam construction |
| Machine suitability | Sewing, overlock and coverlock machines |
| Recommended needle | Universal sewing needle NM 75–80; Madeira recommends article 9455 |
| Colour range | 33 solid colours |
| Pack contents | 1 × 2500m cone in the selected colour |
Madeira Aerolock 125 FAQs
Is this listing for one cone or a set?
It is for one 2500m cone in the colour you select. Order multiple cones when your chosen overlock or coverlock stitch uses several thread paths.
What is Aerolock 125 made from?
It is 100% polyester core-spun thread, combining strong continuous filaments with a smooth fibre covering.
Can I use Aerolock on a regular sewing machine?
Yes. Madeira states that Aerolock performs on sewing machines as well as overlock and coverlock machines. A large cone may require an external thread stand.
What needle size should I use?
Madeira recommends a universal sewing needle in size NM 75–80, such as Madeira article 9455. Confirm the needle also suits the project fabric.
Is Aerolock the same as Aeroflock?
No. Aerolock is a strong core-spun construction thread. Aeroflock is a soft, bulky looper thread used when extra softness, stretch or decorative coverage is wanted.
How many cones does an overlocker need?
That depends on the machine and stitch. A three-thread stitch generally needs three thread paths, while a four-thread stitch needs four. Check the machine manual before ordering.
Will the colour exactly match my screen?
Screen colour is only a guide because displays and lighting vary. Use the four-digit Madeira colour number as the reliable identifier.
Can I mix Aerolock and Aeroflock?
Yes, when the stitch and machine allow it. Aerolock can provide strong needle threads while Aeroflock adds softness and coverage in suitable looper positions.
Choose your colour and prepare for smooth, tidy overlocking
Madeira Aerolock 125 combines core-spun polyester strength, reliable machine performance and 2500m of thread for garment construction, overlocking and coverstitch projects.