An overlocker trims fabric edges, finishes seams and encloses raw edges in one fast operation. It is the right choice for dressmaking, stretch fabrics and anyone who wants stronger, neater seams than a standard sewing machine can usually produce alone.
Browse our range of domestic overlockers for beginners, experienced dressmakers and home sewing businesses. Compare machines by thread count, stitch options, threading system and the types of fabric you plan to sew.
Which Overlocker Should I Buy?
Choose a 3- or 4-thread overlocker for general dressmaking, stretch garments and everyday seam finishing. Choose a model with 2-thread stitches or advanced rolled-hem settings when you need more decorative finishes, lightweight-fabric control or greater versatility.
The most important features to compare are:
- Thread options: Most home sewers benefit from a machine offering both 3- and 4-thread overlocking.
- Differential feed: This helps prevent knitted fabrics from stretching or lightweight fabrics from puckering.
- Rolled hemming: Useful for scarves, occasionwear, frills and narrow decorative edges.
- Threading assistance: Colour-coded guides, needle threaders and air-threading systems can make setup considerably easier.
- Adjustable stitch settings: Look for control over stitch length, cutting width and presser-foot pressure.
- Free-arm sewing: Helpful when finishing sleeves, cuffs and other small circular areas.
For general home dressmaking, a reliable 4-thread model with differential feed and an easy threading system is usually the best starting point.
Overlocker Thread Counts Explained
| Thread setup | Best used for | Main trade-off |
|---|---|---|
| 2-thread | Lightweight edge finishing and decorative stitches | Not suitable for constructing most garment seams |
| 3-thread | Neatening raw edges, rolled hems and lighter seams | Less secure than a 4-thread construction seam |
| 4-thread | Stretch garments, knitwear and general garment construction | Uses more thread but provides a stronger seam |
| 5-thread | Combined safety seams and heavier-duty construction | More common on advanced or industrial machines |
A 4-thread overlocker is the most versatile option for most home dressmakers because it can sew and finish a secure seam at the same time.
Overlocker vs Coverstitch vs Coverlocker
An overlocker is designed primarily to trim and finish fabric edges. A coverstitch machine creates the professional parallel stitching commonly seen on T-shirt hems, while a coverlocker combines overlocking and coverstitch functions in one machine.
| Machine type | Main purpose | Best for |
|---|---|---|
| Overlocker | Cuts, seams and finishes raw edges | Garment construction, knitwear and fast seam finishing |
| Coverstitch machine | Produces stretch hems without cutting the fabric | T-shirts, sportswear, leggings and professional hems |
| Coverlocker | Combines overlocking and coverstitch functions | Sewers wanting both functions with one machine |
Choose an overlocker when your priority is constructing garments and finishing seams. Choose a coverstitch machine when you already have an overlocker but want more professional hems. Choose a coverlocker when space is limited and you are comfortable changing the machine between functions.
What Can You Make With an Overlocker?
Overlockers are especially useful for clothing, stretch fabrics and projects that need durable, professional-looking internal seams.
Common uses include:
- Sewing jersey tops, dresses and knitwear
- Constructing leggings, activewear and children’s clothing
- Finishing woven-fabric seam allowances
- Creating rolled hems on lightweight fabrics
- Gathering fabric using differential feed
- Producing decorative exposed overlock stitches
- Neatening fabric that frays easily
An overlocker complements rather than completely replaces a conventional sewing machine. You will normally still use a standard sewing machine for buttonholes, zips, topstitching and detailed construction work.
Are Overlockers Good for Stretch Fabric?
Yes. Overlockers are particularly well suited to jersey, rib knit, sweatshirt fabric and other stretch materials because the looped stitch can move with the fabric.
Differential feed is especially important when sewing stretch fabric. It controls how the fabric moves beneath the presser foot, helping to prevent wavy seams and unwanted stretching. It can also be adjusted to create controlled gathering where required.
Are Overlockers Suitable for Beginners?
Yes. Beginners can use an overlocker successfully, although threading and tension adjustment may take some initial practice.
A beginner-friendly machine should ideally have:
- Clearly marked, colour-coded threading paths
- Easy access to the loopers
- A built-in rolled-hem conversion
- Differential feed
- Simple tension controls
- A clear instruction manual or threading guide
- Good access to technical advice and servicing
Machines with air threading or assisted lower-looper threading can reduce setup time, but a well-designed manually threaded model can also be straightforward once the threading sequence becomes familiar.
Why Buy an Overlocker From Direct Sewing Machines?
Direct Sewing Machines supplies domestic and industrial sewing equipment to customers throughout the UK. Our team can help you compare models based on your sewing experience, preferred fabrics, required stitches and budget.
Customers can also benefit from:
- A choice of established sewing-machine brands
- Expert advice from an experienced sewing-machine retailer
- UK mainland delivery options on qualifying domestic machines
- A price-promise service
- Finance options on eligible purchases
- Servicing and repairs for many sewing-machine models
- Support from our London sewing-machine shop
For help choosing a machine, contact our team or visit us at 266 Battersea Park Road, London, SW11 3BP.
Frequently Asked Questions
What does an overlocker do?
An overlocker cuts the fabric edge and wraps it in thread while sewing the seam. This creates a neat, flexible and durable finish in one operation.
Can an overlocker replace a sewing machine?
No. An overlocker is excellent for seams and edge finishing, but a standard sewing machine is still needed for tasks such as zips, buttonholes, topstitching and many construction details.
Is a 3-thread or 4-thread overlocker better?
A 4-thread stitch is generally better for constructing garments because it creates a stronger seam. A 3-thread stitch is useful for edge finishing, rolled hems and lighter applications.
Do I need an overlocker for dressmaking?
An overlocker is not essential, but it makes dressmaking faster and gives internal seams a cleaner, more professional finish. It is particularly useful when sewing stretch garments.
Can an overlocker sew woven fabric?
Yes. Overlockers can finish and construct many woven fabrics as well as stretch materials. Stitch settings, needles and thread should be selected to suit the fabric weight.
What is differential feed?
Differential feed controls the speed of the front and rear feed dogs independently. It helps prevent stretch fabric from becoming wavy and lightweight fabric from puckering.
What is the difference between an overlocker and a serger?
There is no functional difference. “Overlocker” is the term most commonly used in the UK, while “serger” is widely used in North America.
Should I buy an overlocker or a coverlocker?
Buy an overlocker if your main need is constructing garments and finishing raw edges. Consider a coverlocker if you also want to create professional coverstitched hems using the same machine.