baby lock Serenity Overlocker
Air threading and automatic tension settings so setup takes seconds rather than minutes.
Spread the cost from
£64.98 per month over 48 months*
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Pre-order now for expected delivery end of December!
Complete your setup
Add accessories to your order in one go and save up to 10% when bought with this machine.
Thread, needles & essentials
Madeira Overlock Thread Box: 12 mixed Aerolock and Aeroflock Reels
£51.95£46.76Save 10%Details
Madeira Aerolock Overlock Thread Box: 24 x 1200m Reels
£99.95£89.96Save 10%Details
Madeira Aerolock Extra Fine Thread Box: 24 x 2000m reels
£135.00£121.50Save 10%Details
Madeira Overlock Thread Set: Aerolock Extra Fine 12 x 2000m spools
£59.95£53.96Save 10%Details
Madeira Overlock Thread Set: Aerolock 12 x 1200m reels
£49.95£44.96Save 10%Details
Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Ts&Cs and late fees apply.
Shop with confidence today knowing that our sewing machine prices are the lowest possible. If we lower our price on this model, we'll refund you the difference.
For purchases made between 22/10/2026 - 01/12/2026
In the event a price does drop between these dates we will refund the difference on request to sales@thesewingstudio.co.uk
Claims must be received by 5th December 2026.
Applies to The Sewing Studio online advertised price only.
This machine comes with baby lock 2-year parts & labour warranty, which can be extended up to 4 years by registering it. If you ever need support or servicing, our friendly team are always here to help.
Products purchased online, in-store, or by telephone between 1st November 2026 and 24th December 2026 are eligible for return up to and including 25th January 2027.
All other terms and conditions of our standard returns policy remain in effect. Purchases made on or after 25 December 2026 will be subject to our standard returns policy.
Need advice?
Our in-house team knows every detail of this machine. Call, message or chat and get honest, expert advice from people who actually sew.
Our standard width fabric can be cut as a Fat Quarter, measuring 50cm x 1/2 the width of the bolt. Above is an example of how your fabric will be received, depending on the quantity ordered.
We also offer a sample service, where you can order 1 single fat quarter of any standard width fabric, to have at home and compare colours. When you are finished, you can send them back to us for a refund (feel free to contact us for more information on this service).
Our fabric can be cut as a Long Quarter, measuring a minimum of 25cm x width of bolt. We will supply the fabric as a continuous length (eg; if you bought 1.25m it will be sent as one piece of fabric).
baby lock Serenity Product Review
The baby lock Serenity is designed to be intuitive to set up and comfortable to use. It does far more than finish edges: decorative hems, elegant trims and fine details are all within reach. It automatically works out how much thread each stitch needs, so you can focus on your project rather than the machine.
RevolutionAir threads both needles and both loopers with air at the push of a button. Automatic Thread Delivery then regulates the thread as you sew, so switching between stitches needs no tension adjustment. Differential feed stops knits stretching and wovens puckering and the built-in thread cutter finishes each seam without reaching for scissors. Electronic speed control with 10 speed settings takes you up to 1,500 stitches per minute or down to a very slow pace for delicate work.
The Serenity sews four-thread overlock, three-thread overlock, two-thread overlock, rolled edges, narrow hems, flatlock, ladder and blanket stitches, with a maximum stitch width of 7.5mm and a stitch length from 0.75 to 4mm. That covers everything from a strong four-thread seam on woven cotton to a fine rolled edge on chiffon. The baby lock Wave stitch turns edges and hems into a decorative feature, ideal when you want a project to look special as well as neat.
The Compact Overlock Table is included as standard and lets you use over 20 optional attachments that were previously reserved for combination and coverstitch machines. Fit the optional double-fold bias binder to sew creative necklines with your favourite overlock stitch.
The baby lock Snap-On Needle System makes changing needles quicker and easier: a magnet in the needle holder keeps each needle in the correct position as you fit it. The snap-on presser foot system takes a wide range of optional baby lock feet and attachments, so ask us to check any you already own. A knee lifter raises the presser foot hands-free and the feed dogs drop automatically when the foot lifts, while the included trim bin keeps your sewing area tidy.
Whether it’s your first overlocker or you’ve been sewing for years, the Serenity takes the hard work out of threading and tension so you can concentrate on making beautifully finished garments.
Key Features
What makes this machine worth it
Machine Type
Overlocker
Stitch Range
Four, three and two-thread overlock and Wave stitch
Control Type
Electronic speed control with LED display
Workspace
2 inches (51mm) right of the needle
Needle Configuration
2 needles, Snap-on tool-free insertion, RevolutionAir threading
Feed System
Differential feed with automatic feed dog lowering
Skill Level
Intermediate
Machine Weight
11.5kg
This machine is perfect for
- Ambitious dressmakers working with jersey, ribbing and stretch knits wanting a refined, professional finish
- Dressmakers who sew bridal gowns and evening wear with super fine and delicate fabrics
- Sewers who have previously struggled with threading overlockers - thread loopers effortlessly with a burst of air. No more frustrating tangles or threading confusion
- Makers looking for a compact overlocker with no compromises on technical precision or features
Can sew but not ideal for
- Hemming T-shirts, leggings and activewear with a ready-to-wear twin-needle finish - the Serenity sews beautiful rolled hems and flatlock seams but a true coverstitch hem needs a coverstitch or combination machine
- Regularly overlocking very thick or bulky layers such as heavy upholstery, canvas or heavy coating fabrics - use our free Machine Match Service and we’ll recommend a model suited to your needs
Not suitable for
- Sewers wanting a combination overlocker and coverstitch - this is overlocker only. The baby lock Ovation and Gloria combine both in one machine
- Sewers who prefer manual tension control - Automatic Thread Delivery (ATD) sets the tension for you whatever fabric or stitch you choose
- Commercial use - this is a premium domestic overlocker, not an industrial model suited to continuous heavy-duty or production work
Materials and Build Quality
At 11.5kg the Serenity is stable even when sewing at speed, and it runs quietly enough to keep you focused.
The new Snap-On Needle System from baby lock makes changing needles easier and more convenient. No tools, no fiddling: a built-in magnet holds the needle securely in place while you insert it.
The electronic speed control with LED display gives you full control at all times, from extremely slow sewing for delicate details to your usual pace. The needle up/down function stops the needle exactly where you need it: down in the fabric to secure your project so nothing slips, or up to easily load the fabric without having to turn the hand wheel. This way, the Serenity sews exactly at your pace and stops exactly where you need it to.
The Difference is in the Details
The Serenity is built for pace and efficiency. RevolutionAir threads in seconds and the machine runs at up to 1,500 stitches per minute. Electronic speed control adjusts pace at the touch of a button with an LED display showing where you are set, down to a very slow speed for delicate work and the needle up/down button stops the needle exactly where you want it for pivoting.
The built-in thread cutter trims the tail at the end of a seam, so the next seam starts straight away.
The Serenity is individually inspected and thoroughly tested before it leaves the factory, so you can sew with confidence from the very first stitch. Designed with a relentless focus on quality, refined engineering and timeless style, baby lock machines deliver flawless results, durability and years of use.
The Sewing Studio is an authorised baby lock retailer. Our expert team can advise on setup, troubleshooting and maintenance before and after purchase. Call, chat or email for hands-on guidance from sewers who know the range.
baby lock machines are designed with ease of use, convenience and sewing comfort top of mind. This is an intuitive model to use which makes it perfect for sewers who want premium results without the learning curve.
The machine operates without traditional thread tension discs and automatically regulates the amount of thread needed for each stitch.
The knee lever raises and lowers the presser foot without taking either hand off the fabric, so a sleeve or a curved edge can be repositioned mid-seam. Lift the foot by knee lever or by hand and the feed dogs drop automatically, so loading fabric takes one movement instead of three. Between the knee lever and the automatic feed dog drop, there are fewer reasons to stop mid-seam.
baby lock Serenity: A Machine for Every Maker
And every project
Simplicity and Elegance in Dressmaking
Dressmakers working with jersey, ribbing and stretch knits will appreciate the refined details possible with the Serenity. With Extra Woolly Lock thread, Metallic Woolly Lock thread, the 3-thread overlock stitch and the double-fold bias binder, you can transform edges into subtly shimmering finishes, a detail that instantly conveys a sense of high quality.
The Serenity seams, trims and finishes in one pass, so a T-shirt or a pair of leggings comes together in far fewer steps. For fine knits and anything worn next to the skin, the lighter two-thread finish sits flatter and feels less bulky at the seam.
Decorative Edges and Fine Finishing
Scarves, sheer overlays and lined edges finish in a single pass, with no pressing and no hand sewing at the hem. The baby lock Wave stitch turns the edge itself into the detail, which suits a scarf hem or a cuff where the finish is part of the design. Binding and corded edges run on the same machine with the Compact Overlock Table fitted.
Delicate lace at the neckline transforms a simple shirt into a romantic, one-of-a-kind piece. With the Serenity and the matching accessories, you can sew it on cleanly and precisely.
Extensive Accessories Available
Unlock new creative possibilities with optional accessories. Explore decorative techniques such as beading, create beautifully finished edges with bias binding or achieve professional results with specialist feet and attachments designed to make challenging techniques easier. Whether you’re embellishing garments, adding texture to home décor or perfecting quilt details, the right accessories can help you take every project further.
Inside the baby lock Serenity
RevolutionAir Threading System
Compressed air pushes thread through the looper tubes and, at the push of a button, through the needle eyes. No hooks, no tweezers, no threading order to remember.
Automatic Thread Delivery System
Rather than clamping thread between tension discs, the system measures what each stitch type consumes and feeds that amount continuously. Change stitch and it recalculates on its own.
Differential Feed
Two sets of feed dogs run at different rates, one ahead of the other, so fabric can be eased in slightly or held under light tension depending on how it behaves.
Two-Thread Overlock Conversion
A converter takes the upper looper out of the stitch, leaving a lighter two-thread finish that uses less thread and sits flatter under a seam.
Compact Overlock Table
The Compact Overlock Table fits the Serenity and accepts over 20 attachments, such as the double-fold bias binder, previously reserved for baby lock combination and cover stitch machines.
Product Specifications
Accessories in the Box
- Instruction manual
- Quick reference threading guide
- Foot Control
- Power cord
- Deluxe Trim Bin
- Knee Lifter
- Lint brush/needle insert tool
- Package of assorted sized needles (Organ HAx1SP/CR)
- Screwdriver
- Tweezers
- Upper cutting blade for replacement
- Looper threading tool
- Thread nets
- Spool caps
- Sponge disks
- Cone holders
- Machine cover
- Compact Overlock Table
- White Screws
Feet in the Box
- 1 x Standard presser foot
Machine Dimensions & Weight
- Model number: BLSS4
- Machine size (W x D x H): 16.5" x 12" x 12" (419mm x 305mm x 305mm)
- Machine weight: 11.5kg (25.4 lbs)
- Workspace: 2 inches (51mm) to the right of the needle
Stitch Options & Controls
- Maximum number of threads: 4
- Four-thread overlock: Yes
- Three-thread overlock: Yes
- Two-thread overlock conversion: Yes
- baby lock Wave stitch: Yes
- Maximum stitch width: 7.5mm
- Maximum stitch length: 4mm
- Maximum sewing speed: 1,500 stitches per minute
- Speed control: electronic, with LED display
- Needle stop position: up or down selectable
- Lighting: 3 LEDs
Overlocking Features & Functions
- Automatic Thread Delivery (ATD) tension system
- RevolutionAir push-button air threading, needles and loopers
- Differential feed
- Drop feed system
- Automatic feed dog lowering on presser foot lift
- Knee lever presser foot lift (hands-free)
- Needle positioning button, up or down
- Built-in thread cutter
- Compact Overlock Table, compatible with over 20 specialty attachments
- Snap-on presser foot system
- Onboard storage: 3 positions (2 magnetic, plus accessory compartment)
Threading and Needle System
- Number of needles: 2
- Needle insertion: Snap-on, tool-free, magnetic retention
- Needle threader type: RevolutionAir
- Looper threading: push-button air threading
- Tension system: Automatic Thread Delivery
Warranty & Support
- 2-year parts and labour warranty included, extendable to 4 years when you register with baby lock
- In-house servicing from our team in Redruth
- Expert advice from The Sewing Studio team
Product Downloads
Frequently Asked Questions
Do I have to adjust the tension when I change stitch?
No. Select the stitch type and the Automatic Thread Delivery system sets the tension for you, so there is nothing to balance by hand when you move from one stitch type to another. It is the main practical difference between the Serenity and a conventional overlocker.
Is this a sensible first overlocker, or is it too much machine?
It is a sensible first overlocker. The two things that put beginners off, threading and tension, are both automated, so the learning curve is mostly about technique rather than setup. The trade-off is that you are paying for that automation, so if you only expect to overlock occasionally, a simpler machine may suit your budget better. Chat online or contact us and we will help you compare the options.
Can the Serenity do coverstitch?
No. The Serenity is a four-thread overlocker, so it seams, trims and finishes edges, but it does not produce the twin-needle coverstitch hem you see on shop-bought T-shirts. If you want both, you would need a separate coverstitch machine or a combination model. Chat online or contact us and our team will talk you through the baby lock machines that cover both jobs.
Will my existing baby lock overlocker feet fit?
Many will. The Serenity uses baby lock's snap-on presser foot system and works with a wide range of optional baby lock feet and attachments, including the beading, blind hem, clear, cording, elastic applicator, lace applicator and ruffling feet. Not every older foot or attachment is compatible, so send us the model or part number and we will check it before you order.
Can it handle lightweight fabrics like chiffon and silk?
Yes. The 3-thread rolled edge gives a fine, narrow finish on chiffon and silk, and the two-thread overlock gives a lighter seam that suits fine fabric. Differential feed stops slippery cloth shifting as it feeds. Needle and thread choice makes as much difference as the machine settings when it comes delicate fabrics.
