Jet-Air Looper Threading
Thread the upper and lower loopers using the one-touch air-threading system rather than navigating the internal path manually.
Premium One-Touch Air-Threading Overlocker
Husqvarna Viking Amber Air S400
Spend less time threading and more time creating. The Amber Air S400 combines one-touch air threading for both loopers, a built-in needle threader, 15 versatile stitches and adjustable fabric controls for fast, professional overlocking.
Jet Air
Looper Threading
Thread both loopers with air
15
Stitch Options
Utility and decorative finishes
2/3/4
Thread Sewing
Flexible seam construction
1,300
Stitches Per Minute
Fast professional finishing
7.8kg
Machine Weight
Substantial yet portable
A premium overlocker that removes the most frustrating part of setup
The Husqvarna Viking Amber Air S400 overlocker is designed for sewists who want professional seam finishing without manually guiding thread through complicated looper pathways.
Its one-touch jet-air system sends thread through the upper and lower loopers, while the adjustable built-in needle threader assists with both needle positions. Changing thread colours, moving between projects and recovering from a broken thread becomes faster and more approachable.
Once threaded, the S400 gives you the flexibility to construct stretch garments, finish woven seams, sew rolled hems, create flatlock effects and produce decorative edges using 2, 3 or 4 threads.
The Amber Air S400 combines the convenience of air threading with the fabric control serious garment sewists need: differential feed, adjustable stitch length, adjustable cutting width, adjustable presser-foot pressure and electronic speed control.
One-touch looper threading
Thread the loopers with a controlled burst of air
Instead of manually navigating the thread through each internal looper guide, place the thread into the threading port, select the required looper and activate the air-threading lever.
This premium system is especially helpful when changing colours frequently, experimenting with decorative thread or returning to overlocking after time away from the machine.
1
Insert the thread
Place the prepared thread end into the selected looper threading port.
2
Activate air threading
Operate the looper threader to send the thread through the internal pathway.
3
Thread the needles
Use the adjustable built-in needle threader for the left or right needle position.
Amber Air S400 features
Premium convenience with precise fabric control
The S400 goes beyond easy threading with the adjustments required for smooth seams across knit, stretch, lightweight and heavier fabrics.
Built-In Needle Threader
The adjustable needle threader can be positioned for either the left or right overlocker needle.
Differential Feed
Reduce stretching on knit fabric, minimise puckering on fine material or create controlled gathering.
Lay-In Tension System
Place each thread directly into its tension pathway and clearly see that it is seated correctly.
Adjustable Stitch Length
Adjust stitch length from approximately 1–5mm to suit edge finishing, garment construction and decorative techniques.
Adjustable Cutting Width
Fine-tune how much fabric is trimmed so the stitch forms neatly around the finished edge.
Adjustable Presser-Foot Pressure
Change the pressure applied to fine, medium, thick or layered fabrics for improved feeding.
Built-In Two-Thread Converter
Quickly convert the machine for lightweight two-thread finishes and decorative flatlock effects.
Easy Rolled-Hem Conversion
Sew two or three-thread rolled hems without changing the standard presser foot or stitch plate.
Electronic Speed Control
Sew at up to 1,300 stitches per minute with responsive control and piercing power throughout the speed range.
LED Sewing Light
Clear illumination over the sewing area helps you monitor fabric placement and stitch formation.
Front-Cover Safety Lock
The safety lock prevents the machine from sewing while the front cover is open.
15 stitch options
From strong stretch seams to delicate rolled edges
Select the thread configuration that best suits the fabric, seam strength and finished appearance you want.
01. 4-thread overlock
02. 3-thread overlock, wide
03. 3-thread overlock, narrow
04. 3-thread narrow edge
05. 3-thread rolled edge
06. 3-thread flatlock, wide
07. 3-thread flatlock, narrow
08. 3-thread stretch overlock
09. 2-thread overlock, wide
10. 2-thread overlock, narrow
11. 2-thread wrapped edge, wide
12. 2-thread wrapped edge, narrow
13. 2-thread rolled edge
14. 2-thread narrow edge
15. 2-thread flatlock
What can you sew?
Designed for garment makers and creative overlocking
Knit and Stretch Clothing
Construct T-shirts, leggings, knit dresses, activewear and comfortable stretch garments.
Professional Dressmaking
Sew and finish dresses, tops, skirts, jackets, trousers and tailored garments.
Lightweight Rolled Hems
Produce narrow finishes on scarves, frills, napkins, sheer fabric and decorative edges.
Flatlock Effects
Create flatter seams, ladder-stitch effects and decorative finishes using specialty thread.
Alterations and Repairs
Refinish altered seams and raw edges with a clean, commercially inspired result.
Gathering and Decorative Edges
Use differential feed and decorative thread to add gathers, texture and feature edging.
Official Husqvarna Viking video
See the Amber Air S400 in action
Watch an official introduction to the one-touch air-threading system, built-in needle threader, differential feed and other key S400 features.
Official video supplied by Husqvarna Viking North America.
Technical information
Husqvarna Viking Amber Air S400 specifications
| Machine type | Premium domestic overlocker / serger |
|---|---|
| Looper threading | One-touch jet-air threading |
| Needle threading | Adjustable built-in needle threader for left and right positions |
| Thread capability | 2, 3 and 4 threads |
| Stitch options | 15 |
| Maximum sewing speed | Up to 1,300 stitches per minute |
| Stitch length | Approximately 1–5mm |
| Stitch/cutting width | Approximately 3.3–7.5mm |
| Differential feed ratio | Approximately 0.5–2.0 |
| Presser-foot rise | Approximately 5–7mm, including extra lift |
| Needle system | HAx1SP sizes 11 or 14; compatible stretch 130/705 needles in appropriate sizes |
| Lighting | LED sewing light |
| Upper cutter | Movable/disengageable |
| Thread cutter | Integrated |
| Machine dimensions | Approximately 34.8cm long × 29cm wide × 29.9cm high |
| Machine weight | Approximately 7.8kg |
Included accessories
Everything needed to start overlocking
The Amber Air S400 is supplied with the core tools and accessories required for threading, cleaning, setup and everyday sewing.
- Large screwdriver
- Small screwdriver
- Double-ended wrench
- Tweezers
- Needle set
- Thread nets
- Spool holders
- Lint brush
- Waste tray
- Needle holder/converter pin
- Spare upper cutter
- Looper-threading wire
- Accessory box
- Foot control
- Machine cover
- Instruction manual
Amber Air S400 Brochure
Review the manufacturer’s feature and benefit guide.
Open the Product Brochure
Amber Air S400 Instruction Manual
Access threading, stitch setup, maintenance and operating guidance.
Open the Instruction Manual
Package contents can change between production runs. Contact Direct Sewing if you need confirmation of the accessories supplied with current stock.
Backed by Direct Sewing’s New Zealand support team
Direct Sewing has more than 30 years of sewing-machine experience, with a Henderson showroom, service centre and technical workshop. Our team can help you compare overlockers, select suitable thread and needles, and support your machine after purchase.
Experienced Machine Advice
Discuss your fabrics, projects and sewing goals with an experienced equipment team.
Henderson Showroom
Visit Direct Sewing at 138 Railside Avenue, Henderson, Auckland.
In-House Service Centre
Access local machine servicing, repairs and technical assistance.
Genuine NZ Support
Purchase from a New Zealand sewing-machine specialist with local follow-up help.
Nationwide Delivery
Machines, parts, thread and accessories can be supplied throughout New Zealand.
Thread and Accessories
Find suitable overlocker thread, needles, optional feet and sewing supplies in one place.
Frequently asked questions
Husqvarna Viking Amber Air S400 FAQ
What does one-touch air threading mean?
Air threading uses a controlled burst of air to send thread through the internal upper or lower looper pathway. This removes much of the manual threading normally required inside an overlocker.
Does the Amber Air S400 also thread the needles?
The air system threads the loopers. The left and right needles are threaded separately using the machine’s adjustable built-in needle threader.
Is the Amber Air S400 suitable for a beginner?
Yes. Air threading and the built-in needle threader remove two of the main setup challenges faced by new overlocker users. You will still need to learn thread tension, differential feed and suitable settings for different fabrics, but the threading process is considerably more approachable.
Does the Amber Air S400 have automatic tension?
No. It uses accessible lay-in tension controls rather than automatic tension. This gives you direct control over the needle and looper threads for different stitches, fabrics and decorative techniques.
What fabrics can the Amber Air S400 overlock?
It can work with lightweight woven fabrics, cotton, jersey, rib knit, fleece, stretch fabric, denim and layered garment seams. Differential feed, adjustable cutting width and adjustable presser-foot pressure help you tune the machine for each fabric.
Can the Amber Air S400 sew rolled hems?
Yes. It can create two and three-thread rolled hems without requiring a separate rolled-hem presser foot or stitch plate. Rolled hems are useful for scarves, lightweight garments, napkins, frills and decorative edges.
Can it sew two-thread stitches?
Yes. The built-in two-thread converter allows two-thread overlock, wrapped-edge, rolled-edge, narrow-edge and flatlock configurations.
Is the Amber Air S400 a coverstitch machine?
No. It is a dedicated overlocker. It constructs and finishes seams, trims fabric edges, and creates rolled hems and flatlock effects. A separate coverstitch machine is required for the parallel topstitching commonly used on commercial T-shirt hems.
Which needles does the Amber Air S400 use?
The manufacturer specifies HAx1SP needles in sizes 11 or 14, with appropriate stretch-system 130/705 needles also referenced in the manual. Match the needle type and size to the fabric being sewn.
Can Direct Sewing service and support the Amber Air S400?
Yes. Direct Sewing operates a showroom, service centre and technical workshop in Henderson, Auckland. The team can assist with machine advice, overlocker thread, needles, optional accessories, servicing and repair enquiries.
Can I view or discuss the machine before ordering?
Contact Direct Sewing to confirm current showroom availability or arrange product advice. The showroom is located at 138 Railside Avenue, Henderson, Auckland, and the team can also help customers throughout New Zealand by phone or online.
Spend less time threading and more time sewing
The Husqvarna Viking Amber Air S400 is an excellent choice for garment makers who want the speed and finish of a premium overlocker without the frustration of manually threading the loopers. Contact Direct Sewing for advice, availability or help comparing the S400 with other domestic overlockers.