BERNINA L 850

BERNINA L 850

The ultimate Overlocker

  • One-step BERNINA Air Threader
  • Extremely fast, precise and quiet
  • Convenient freearm
  • Total Stitch Control for perfect seams
  • Grand sewing space

BERNINA L 850 – A true masterpiece among sergers

Our Swiss engineers have created a masterpiece, which allows you to thread the machine even faster and more conveniently. Simply press the foot control and you're off!

"The ultimate overlocker" Andrea Müller about the BERNINA L 850
"The ultimate overlocker."Andrea Müller, Textile Designer „Jolijou"

As the designer of the brand “Jolijou”, Andrea Müller creates colorful jersey fabrics and loves bringing them to life in new projects using the BERNINA L 850 overlocker. In particular, the One-step BERNINA Air Threader and the fast sewing speed with perfect stitch quality win this mother of three’s admiration when projects have to be done on a limited schedule.

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The One-step BERNINA Air Threader

The One-step BERNINA Air Threader

  • Simple threading with air
  • Now, you're ready to sew
  • Imaging threading that is actually fun
The looper threads are magically moved through the machine by air with one simple step on the foot control. Now both hands are free to guide the threads. The L 850 automatically sets the loopers in the correct position of the air threader – no turning the handwheel or searching for the right position.

Sew in comfort

Sew in comfort

  • Raise and lower presser foot easily
  • Both hands free to guide the fabric
  • Easy access to the needles thanks to presser foot that swings out
With the BERNINA Free Hand System (FHS) you can raise and lower the presser foot with your knee. In addition, the presser foot easily swings out for convenient access to the needles.

Total Stitch Control for perfect seams

  • Individually adjustable settings for Total Stitch Control
  • Perfect for working with various fabrics and threads in any combination
  • Fully adjustable differential feed
The L 850 offers several settings for Total Stitch Control - all individually adjustable. The best part? You can change all of these settings while sewing - including the thread tension, cutting width, stitch length and Micro Thread Control (mtc).

Extremely fast, precise & quiet

Extremely fast, precise & quiet

  • Sew up to 1,500 stitches per minute
  • Strong, consistent and precise at any speed
  • Extremely quiet

Not only can you sew quickly, but you can also sew stitch-by-stitch, making the flawless production of precise lines and curves a simple process. Plus, you will enjoy how extremely quiet the BERNINA L 850 sews.

Quick threading

Quick threading

  • One-path, color-coded threading
  • Automatic Needle stop up function
  • Integrated Needle Threader
The integrated Needle Threader and automatic needle stop up function make threading the needles simple. You can easily change from an overlock seam to a rolled hem or flatlock seam in no time because the thread remains in the same threading path.

Grand sewing space

Grand sewing space

  • 5 5/8" right to the needle
  • Easy on/off extension table included
  • Convenient freearm
The space offered on the L 850 is generous by any definition. It has more room to the right of the needle and more work space height than any other BERNINA serger. Sew closed items with ease by simply sliding sleeves or cuffs over the convenient freearm.

Get a feel for this fantastic machine

Get a better feel for this incredible machine. Simply click the button below and you will see every stunning angle of the BERNINA L 850.

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Personal advice at your Local BERNINA Store

Over 2,000 BERNINA Stores worldwide offer valuable services to all our customers. Your local BERNINA Store is there to proudly help you, with advice on machines and accessories that best suit your needs, selection of BERNINA Embroidery Software and also in servicing your BERNINA.

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Features & Functions

  • Overview
  • Comfort Features
  • Technical Specifications
  • Stitch Variations
BERNINA L 850

Note:
Not all models and accessories are available in all countries. We reserve the right to make changes in both features and design.

Total number of stitches 18
One-step BERNINA Air Threader (for looper threads)
Freearm
BERNINA Free Hand System (FHS) with knee lifter
Easy to engage and disengage the knife from outside
Swing-out presser foot with auto swing back
Built-in needle threader
Automatic needle stop up
Micro Thread Control (mtc)
3– 9 mm overlock seam width
Sewing speed, stitches per minute 400-1500

Product brochure – All information at a glance

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Note:
Not all models and accessories are available in all countries. We reserve the right to make changes in both features and design.

One-step BERNINA Air Threader (for looper threads)

One-step BERNINA Air Threader (for looper threads)

Automatically threads the loopers. The One-step BERNINA Air Threader is activated with the BERNINA Foot Control, so both hands remain free to hold the thread over the Air Threader Nozzles.
Freearm

Freearm

Freearm for easy sewing of tubular projects such as cuffs, legs and necklines.
Sewing space to the right of the needle 143 mm

Sewing space to the right of the needle

More overlocking space to the right of the needles offers comfort and more flexibility when stitching large and small projects. Allows for easy access to presser foot lifter and needles with the right hand. Ideal for handling from the right when the left hand is holding fabric and notions in place over the Freearm.
BERNINA Free Hand System (FHS) with knee lifter

BERNINA Free Hand System (FHS) with knee lifter

Use the knee-operated lever to raise & lower the presser foot allowing your hands to manage your project at all times.
Speed selection switch

Speed selection switch

Sewing top speed can be reduced via the Speed Selection Switch. The maximum sewing speed can be reduced from 1,500 to 650 stitches per minute.
Integrated upper looper converter

Integrated upper looper converter

Easily set up for applications without upper looper thread with the built-in Upper Looper Converter. To engage, flip to the left and insert into the looper eye. To disengage, push out of looper eye and flip to the right until it clicks into lowest position.
Easy to engage and disengage the knife from outside

Easy to engage and disengage the knife from outside

Knife On/Off Lever is positioned on the outside left of the machine base. The upper knife is quickly disengaged with one finger when opting not to trim. It is also easily accessible while sewing.
Rolled hem lever integrated under stitch plate

Rolled hem lever integrated under stitch plate

The Rolled Hem Selection Lever built into the stitch plate is easy to switch to a rolled hem stitch and back again by simply moving the rolled hem selection lever.
Adjustable cutting width while sewing

Adjustable cutting width while sewing

The cutting width dial on the front of the machine can be adjusted to accurately set up seam width, and is adjustable (between 3 mm and 9 mm) even while sewing.
Thread tension release when presser foot raised

Thread tension release when presser foot raised

As soon as the presser foot is lifted, the thread tension discs release automatically and allow easy, tension-free threading.
Adjustable thread tension while sewing
2-step presser foot lifter with front-foot-lift

2-step presser foot lifter with front-foot-lift

The Two-step Presser Foot Lifter provides additional clearance under the foot when overlocking multiple layers or bulky fabrics. The Front Foot Lift gives an additional lift to the front of the presser foot enabling accurate positioning of multiple layers of fabric and bulky projects underneath it.
Swing-out presser foot with auto swing back

Swing-out presser foot with auto swing back

Presser Foot swings to the left, providing ample space for easy threading, hassle-free needle changing and to easily lay the threads under the presser foot.
Workspace height 86 mm

Workspace height

More overlocking space to the right of the needles offers comfort and more flexibility when stitching large and small projects. Allows for easy access to presser foot lifter and needles with the right hand. Ideal for handling from the right when the left hand is holding fabric and notions in place over the Freearm.

Product brochure – All information at a glance

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Built-in needle threader

Built-in needle threader

Built-in Needle Threader located at the needle bar area easily switches to thread both the left and right needles.
Color-coded threading path

Color-coded threading path

Color-coded Threading Paths, along with a threading diagram inside the looper cover, ensure accurate threading every time.
Needle up/down with BERNINA foot control
Automatic needle stop up

Automatic needle stop up

The needle always stops in the highest position up at the end of each stitch.
Stitch length fine tuning for rolled hem

Stitch length fine tuning for rolled hem

The preferred rolled hem range (between 0.8 and 1.5) is outlined on the Stitch Length knob.
Stitch-by-stitch sewing

Stitch-by-stitch sewing

The DC Motor with BERNINA Foot Control enables Stitch-by-Stitch sewing, as well as half stitches (needle up/down) with the BERNINA Foot Control Back-kick function.
Micro Thread Control (mtc)

Micro Thread Control (mtc)

With Micro Thread Control, the over-edge thread length can be set directly resulting in the perfect seam with one quick adjustment.
Adjustable stitch length while sewing
Adjustable differential feed while sewing

Adjustable differential feed while sewing

Differential Feed ensures wave-free seams in knits and prevents puckering in fine fabrics, while allowing deliberate gathering as an option. With an easily accessible dial, adjustments to the fabric feed (from 0.7 to 2.0) can be made even while sewing.
Safety switch for open cover and raised presser foot

Safety switch for open cover and raised presser foot

By default, the machine will not sew with presser foot raised. Safety Switch to reduce sewing speed and activate Pulse Drive when threader or looper cover is open. The machine sews slowly until it reaches the correct position for threading.
2 LED sewing lights

2 LED sewing lights

LED lights illuminate the sewing and looper area making it easier to thread the needles and loopers as well as reducing eye strain while stitching projects in a brighter lit area.
Thread cutter

Thread cutter

Thread Cutter with Clamp conveniently positioned on outside of machine and holds the thread chain out of the way ready to start the next seam.
Accessories in the threader cover
3– 9 mm overlock seam width

3– 9 mm overlock seam width

Overlock stitch width range from 3-9 mm and stitch finger moves in conjunction with cutting width dial. Right needle range 3-7 mm. Left needle range 5-9 mm.
Weight of machine 12.3 kg
6-step presser foot pressure

6-step presser foot pressure

Presser foot pressure is adjustable to accommodate sheer to thick fabrics.

Product brochure – All information at a glance

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Motor DC

Motor

The DC Motor with BERNINA Foot Control enables slow and steady sewing, even Stitch-by-Stitch sewing or half stitch sewing (needle up/down). The AC motor is the industry standard and allows continously variable sewing speed with the Foot Control.
Sewing speed, stitches per minute 400-1500
Total number of stitches 18
4-thread overlock 1
#

4-thread overlock

The 4-thread overlock is a sturdy and strong stitch, most often used for durable and elastic seams in knits and stretchy fabrics.

Suitable for:
  • Fine to medium heavy woven and knitted fabrics
  • Sportswear
  • Apparel
  • Home textiles
    		•
    3-thread overlock (wide / narrow) 2
    #

    3-thread overlock (wide / narrow)

    The 3-thread overlock is a balanced seam and also ideal for neatening edges, hems and facings, quick-sewn edge finishing and effect seams. It is often used in the garment industry for T-Shirts, children's garments, dessous.

    Suitable for:
  • Strong woven fabrics, pile, furry materials or sturdy knits (wide)
  • Fine to medium heavy woven and knitted fabrics (narrow)
  • Apparel
  • Home textiles
    		•
    3-thread super-stretch 1
    #

    3-thread super-stretch

    The 3-thread super-stretch stitch creates overlock seams for super stretchy and two-way-stretch fabrics used for gymnastic or swimwear. An especially soft stitch, ideal for dessous and gymnastic wear, is achieved by using a wooly nylon in the looper (and needles).

    Suitable for:
  • Elastic materials
  • Highly elastic sportswear, swimwear
  • Dessous
    		•
    3-thread flatlock ( wide / narrow) 2
    #

    3-thread flatlock ( wide / narrow)

    The 3-thread flatlock is a flat, only little stretchy seam that is sewn on the right side of the fabric and is especially ideal for creative overlock projects in combination with decorative threads. The wrong side of the stitch is known as "ladder stitch" and also used for decorations or base to weave tape or cord into the stitch.

    Suitable for:
  • Woven and knitted fabrics
  • Patchwork
  • Apparel and sportswear
  • Home textiles
  • Dessous (narrow)
    		•
    3-thread narrow seam 1
    #

    3-thread narrow seam

    The 3-thread narrow seam is used for fine fabrics or see-through materials like silk, cotton or synthetic fabrics. It can be used for pintucks in heirloom projects and as a decorative fine edge finish, e.g. with two different shades of embroidery thread in the loopers.

    Suitable for:
  • Woven and knitted fabrics
  • Sewing or inserting laces
  • Lightweight outerwear
  • Accessories
    		•
    3-thread rolled hem 1
    #

    3-thread rolled hem

    Attractive and quickly sewn decorative edge finish, for example with two different shades of embroidery thread in the loopers. The rolled hem can also be used for pintucks in heirloom projects.

    Suitable for:
  • Fine woven and knitted fabrics
  • Accessories
  • Lightweight outerwear
  • Home textiles
    		•

    Product brochure – All information at a glance

    Download now
    3-thread picot stitch 1
    #

    3-thread picot stitch

    The 3-thread picot stitch is an attractive and quickly sewn edge for woven fabrics and is also ideal for scarfs or bridal wear, as well as edges on ruffles.

    Suitable for:
  • Fine and light woven and knitted fabrics
  • Accessories
  • Lightweight outerwear
  • Home textiles
    		•
    2-thread rolled hem 1
    #

    2-thread rolled hem

    Achieve fine edge finishing on hems, ruffles and flounces, ideal for bridal wear, or lingerie. Is often used as lettuce edge finish in knits with differential feed or fishing line.

    Suitable for:
  • Fine and light woven and knitted fabrics
  • Pintucks or lace insertion
  • Linen, foulards, handkerchiefs
  • Lighter outerwear, evening wear
  • Home textiles
    		•
    2-thread wrapped overlock (wide / narrow) 2
    #

    2-thread wrapped overlock (wide / narrow)

    The 2-thread wrapped overlock is a reversible stitch, ideal for neatening single layers of fabric, seams, hems and facings or as a decorative element with woven or fleecy fabrics or firm knits.

    Suitable for:
  • Medium heavy to heavy woven and knitted fabrics (wide)
  • Light woven and knitted fabrics (narrow)
  • Reversible edgings
  • Neating
  • Decorative finishing on outerwear and home textiles
    		•
    2-thread overlock (wide / narrow) 2
    #

    2-thread overlock (wide / narrow)

    The 2-thread overlock is ideal for neatening fine single layers of fabric and assures no seam puckering.

    Suitable for:
  • Medium heavy to heavy woven and knitted fabrics (wide)
  • Light to medium heavy woven and knitted fabrics (narrow)
  • Apparel
  • Home textiles
    		•
    2-thread blanket stitch (wide / narrow) 2
    #

    2-thread blanket stitch (wide / narrow)

    The 2-thread blanket stitch is used on ready-made blankets or on heavier fabrics with longer stitch and maybe more cutting width.

    Suitable for:
  • Medium heavy to heavy woven and knitted fabrics and pile (wide)
  • Light to medium heavy woven and knitted fabrics and pile (narrow)
  • Furry materials
  • Decorative finishing on apparel, coats, jackets, home textiles
    		•
    2-thread flatlock (wide / narrow ) 2
    #

    2-thread flatlock (wide / narrow )

    A highly stretchy and flat stitch, often used with decorative threads or wooly nylon for dessous, swimwear and gymnastic wear.

    Suitable for:
  • Woven and knitted fabrics
  • Patchwork
  • Sportswear, swimwear
  • Apparel
  • Dessous (narrow)
    		•

    Accessories

    Unleash your creativity with the included accessories and be prepared for any creative challenge with a huge variety of optional accessories

    • Included
    • Compatible

    Standard accessories BERNINA L 850

    Here you will find an overview of the standard accessories for the BERNINA L 850.

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    Standard Overlock Foot #L10 (with Tape Guide) (L 850/860)

    Suitable for overlocking projects where the fabric edge is cut and neatened in a single operation. The presser foot is equipped with an adjustable open tape guide.

    Learn more

    Slide-on Table (L 8 Series)

    The Slide-on Table is used to enlarge the sewing area to the left of the sewing area. It enables easier guidance of large fabrics and a better view of the sewing project.

    Learn more

    BERNINA Tweezers

    BERNINA Tweezers allow you to thread your overlocker with ease and remove any remaining pieces of thread from the machine.

    Learn more

    Brush (L 8 Series)

    This tool helps to remove dust and lint from the looper and stitch-plate area.

    Learn more

    Screwdriver

    The Screwdriver makes changing needles simple.

    Learn more

    Spool Stabilizer for (L 8 Series)

    The Spool Stabilizer prevents spools and cones of various sizes from vibrating at any sewing speed.

    Learn more

    Overlocker Oil

    Regular care ensures the flawless operation of the overlocker. Lubricating with this convenient Overlocker Oil is an important part of it. 

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    Accessories Box (L 8 Series)

    The large accessory box and the corresponding extension box provide storage space for L 8 Series presser feet and accessories.

    Learn more

    Knee lifter/Free Hand System (FHS)

    The Knee lifter/Free Hand System (FHS) lets you raise the presser foot with your knee. Especially recommended for delicate fabrics.

    Learn more

    Cut-offs Bin (L 8 Series)

    The Cut-offs Bin keeps the sewing table tidy. Simply click it on to the looper cover and dispose of fabric cut-offs immediately after cutting. 

    Learn more

    Right seam guide (L 8 Series)

    The right seam guide helps to guide the fabric and ensures that it is cut evenly. 

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    Needle Threader/inserter (L 8 Series)

    The Needle Threader/inserter makes it easy to hold, insert or remove as well as thread overlocker needles.

    Learn more
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    Accessories for Overlocker

    Accessories for Overlocker

    BERNINA Special accessories for overlocker let you equip your serger to your own individual requirements and apply creative techniques with flair and precision.

    See all

    Note:
    Not all models and accessories are available in all countries. We reserve the right to make changes in both features and design.

    Accessories for Overlocker

    Standard Overlock Foot (with Tape Guide)

    Suitable for most overlock projects, where the fabric edge is cut and neatened in one step. Compatible with L 850 or L 860.

    Learn more

    Clear Overlock Foot #L27 (L 850/860)

    The transparent overlock foot eases precise guiding of fabric, for example for sewing corners or circles. Successful to perfect seams and edge finishes in due course.

    Learn more

    Elasticator Foot #L14 (L 850/860)

    The Elasticator Foot guides and stretches the elastic (max. width 20 mm) as it is being sewn on. Ideal for lingerie, swimwear, sportswear and home textiles.

    Learn more

    Elasticator Foot

    The Elasticator Foot guides and stretches the elastic as it is being sewn on. Ideal for lingerie, swimwear, sportswear and home textiles.

    Learn more

    Blindstitch Foot #L19 (L 850/860)

    The Blindstitch Foot can also be used for flatlocking folded edges and for heirloom techniques. The adjustable guide plate on the side makes it easier to stitch blind hems.

    Learn more

    Blindstitch Foot

    The adjustable guide makes it easier to stitch blind hems.

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    Beading and Sequin Foot #L15 (L 850/860)

    With the Beading and Sequin Foot strings of beads and sequins up to a maximum diameter of 6 mm can be sewn on easily and quickly.

    Learn more

    Multi-purpose Foot with Guide

    The guide groove guides the piping as it is being made and sewn in. 

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    Piping Foot #L16S (L 850/860)

    The Piping Foot #L16S is best to create and sew in piping up to maximum of 3 mm. It is used for light fabrics.

    Learn more

    Piping Foot #L16L (L 850/860)

    The piping foot #L16L is best to create and sew in piping. It is used for mediumweight to heavy fabrics.

    Learn more

    Cording Foot #L17 (L 850/860)

    This Cording Foot is used for sewing thin cord, wire, fishline, pearl or fine yarn, for example into a rolled hem.    

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    Cording Foot

    The Cording Foot is used e.g. for sewing thin cord, wire, fishline, perle yarn or fine yarn into a rolled hem. 

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    Gathering Foot #L18 (L 850/860)

    The Gathering Foot #L18 is suitable for sewing ruffles, whereby the gathered fabric can be sewn to a smooth piece of fabric at the same time.

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    Gathering Foot

    The fabric to be gathered is positioned underneath the Gathering Attachment, whilst the fabric that remains flat is added on top.

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    Curve Foot #L23 (L 850/860)

    The narrow and short design of the foot allows maneuverable sewing of small rounded shapes and curves.

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    Shirring Foot #L24 (L 850/860)

    With the Shirring Foot #L24, you can sew on tapes up to 12 mm wide and gather or shirr light and soft single-layer fabrics. The presser foot is suitable for all overlock stitches.
     

    Learn more

    Decorative Thread Spool Pin (L 8 Series)

    This horizontal spool pin for the L 8 Series holds parallel-wound flanged spools and conventional household spools of decorative and metallic thread. 

    Learn more

    Freearm Cover (L 8 Series)

    The Freearm Cover is used to cover the opening of the freearm to get a consistent working surface in the sewing area. At the same time, the stitch plate remains easily accessible.

    Learn more

    Brush/Needle Inserter

    This tool helps to remove dust and lint from the looper and stitch-plate area.

    Learn more

    Spool Stabilizer

    The Spool Stabilizer prevents spools and cones of various sizes from vibrating at any sewing speed.

    Learn more

    Upper Accessories Holder (L 8 Series)

    The Upper Accessories Holder is used to attach accessories above the presser foot.

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    CS Lock Tool

    With the CS Lock Tool, the needle threads can be pulled out from under the foot more easily and without damaging the fabric.

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    Threading Kit Overlocker/Serger

    The threading kit for overlocker simplifies threading along the instruction manual and helps to adjust the optimal seam.

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    Accessories Box

    The Accessories Box can be used to store overlocker presser feet and other accessories.

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    OL/CS Height Compensating Tool

    The OL/CS Compensating Tool makes it easy to sew over cross seams and trims of different heights.

    Learn more

    Cut-offs Bin

    The Cut-offs Bin keeps the sewing table tidy.

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    Overlocker Trolley

    The practical Trolley is very sturdy and perfectly suited when you are en route. 

    Learn more

    Adjustable Tape Guide (L 8 Series)

    With the Adjustable Tape Guide you can feed tapes precisely onto the fabric. The guide is suitable for tapes with a width of 10 to 60 mm and for all overlock, cover and combo stitches. 

    Learn more

    Decorative Threads Guide (L 850/890)

    This guide is ideal for sewing wide seams and hems with decorative threads on the L 850/890.

    Learn more

    Right/Left Seam Guides

    The right seam guide helps to guide the fabric and ensures that it is cut evenly. The left seam guide is ideal for sewing parallel lines of overlocking, coverstitching and chainstitching.

    Learn more

    Needle Threader

    The Needle Threader makes it easy to thread overlocker needles.

    Learn more

    Tutorials

    • Starting to sew
    • Threading
    • Seam variations
    • Stitch optimization
    • Machine maintenance

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    • BERNINA L 850 Overlocker/Serger: Getting Started

      How to get started. How to attach or detach kneelifter, slide-on table, cut-offs bin or presser foot. What are the functions of foot control and knee lifter. How can the presser foot swing out or be detached and attached.

    • BERNINA L 850 Overlocker/Serger: Stitch Selection, Symbols, Operating Elements

      How to read the stitch selection chart and what are the symbols. Where are the operating elements on the machine. Which settings are possible.

    • BERNINA L 850 Overlocker/Serger: Upper Looper Converter

      How to activate the upper looper converter. How to de-activate the upper looper converter. How to sew without upper looper thread.

    • BERNINA L 850 Overlocker/Serger: Getting Started

      BERNINA L 850 Overlocker/Serger: Getting Started

    • BERNINA L 850 Overlocker/Serger: Stitch Selection, Symbols, Operating Elements

      BERNINA L 850 Overlocker/Serger: Stitch Selection, Symbols, Operating Elements

    • BERNINA L 850 Overlocker/Serger: Upper Looper Converter

      BERNINA L 850 Overlocker/Serger: Upper Looper Converter

      We use the YouTube service to display videos. This service may collect data about your activities. For more information, please see our Privacy Policy. To view the video, please accept "Targeting cookies."

    • BERNINA L 850 Overlocker/Serger: Looper Threading, Air Threader

      How to thread the loopers. How to use the air threader. How to swing the foot out. How to activate the air threader.

    • BERNINA L 850 Overlocker/Serger: Needle Threading

      How to thread the needles and use the built-in needle threader. How to use the manual needle threader.

    • BERNINA L 850 Overlocker/Serger: Changing Needles

      Which needles are recommended? How to remove or insert the needles. How high are the needles. How to use the manual needle threader. Why tighten the needle set screws.

    • BERNINA L 850 Overlocker/Serger: Looper Thread Change and Alternative Threading Methods

      Looper thread change and alternative threading methods when the yarn can not directly be threaded by air threader. How to use the threading wire when the air threader is blocked. Threads and yarn shall be moving in the air threader pipes freely. Coated yarn/hand-sewing thread is not suitable for air-threader pipes!

    • BERNINA L 850 Overlocker/Serger: Looper Threading, Air Threader

      BERNINA L 850 Overlocker/Serger: Looper Threading, Air Threader

    • BERNINA L 850 Overlocker/Serger: Needle Threading

      BERNINA L 850 Overlocker/Serger: Needle Threading

    • BERNINA L 850 Overlocker/Serger: Changing Needles

      BERNINA L 850 Overlocker/Serger: Changing Needles

    • BERNINA L 850 Overlocker/Serger: Looper Thread Change and Alternative Threading Methods

      BERNINA L 850 Overlocker/Serger: Looper Thread Change and Alternative Threading Methods

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    • BERNINA L 850 Overlocker/Serger: Cutting Width, (Stitch Width) mtc, Rolled Hem

      How to adjust the cutting width for various stitches, decorative yarn or wide seams. How to de-activate and activate the knife. Use mtc micro thread control to fine-tune the looper threads to prevent loose loops or fabric tunneling. How to prevent the fabric from rolling unintentionally. How to set for rolled hem to roll the edge intentionally.

    • BERNINA L 850 Overlocker/Serger: Stretchy Seams and Neatening Edges with 4- and 3-Thread Overlock

      How to sew seams with 4- and 3-thread overlock stitches. Neatening fabric edges with 3-thread overlock. How to sew wave free seams in knitwear. How to increase elasticity of stitches.

    • BERNINA L 850 Overlocker/Serger: Stitch Length, Differential Feed, Gathering

      How to adjust the stitch length for various stitches, heavy yarn or fine rolled hems. How to adjust differential feed to prevent soft knits from waving out. How to use differential feed to keep fine woven fabric from puckering. How to adjust differential feed and stitch length for gathering or ruffles in fine fabrics. How to gather both sides regularly.

    • BERNINA L 850 Overlocker/Serger: 3-Thread Superstretch, 2-Thread Wrapped Overlock

      How to sew a 3-thread superstretch stitch. How to sew a 2-thread wrapped overlock.

    • BERNINA L 850 Overlocker/Serger: Rolled Hem with 3 and 2 Threads, Lettuce Edging, Picot Stitch

      How to sew a 3-thread rolled hem. How to sew a 2-thread rolled hem. How to adjust for a picot stitch. How to sew a scalloped edge.

    • BERNINA L 850 Overlocker/Serger: Flatlock with 3- and 2-Threads

      How to sew set and sew flatlock with 3- and 2-threads. What is the advantage of a 2-thread flatlock.

    • BERNINA L 850 Overlocker/Serger: 2-Thread Blanket Stitch, 2-Thread Overlock

      How to set and sew a blanket stitch. How to neaten fabric edges with a decorative 2-thread blanket stitch. How to neaten edges with 2-thread overlock.

    • BERNINA L 850 Overlocker/Serger: Cutting Width, (Stitch Width) mtc, Rolled Hem

      BERNINA L 850 Overlocker/Serger: Cutting Width, (Stitch Width) mtc, Rolled Hem

    • BERNINA L 850 Overlocker/Serger: Stretchy Seams and Neatening Edges with 4- and 3-Thread Overlock

      BERNINA L 850 Overlocker/Serger: Stretchy Seams and Neatening Edges with 4- and 3-Thread Overlock

    • BERNINA L 850 Overlocker/Serger: Stitch Length, Differential Feed, Gathering

      BERNINA L 850 Overlocker/Serger: Stitch Length, Differential Feed, Gathering

    • BERNINA L 850 Overlocker/Serger: 3-Thread Superstretch, 2-Thread Wrapped Overlock

      BERNINA L 850 Overlocker/Serger: 3-Thread Superstretch, 2-Thread Wrapped Overlock

    • BERNINA L 850 Overlocker/Serger: Rolled Hem with 3 and 2 Threads, Lettuce Edging, Picot Stitch

      BERNINA L 850 Overlocker/Serger: Rolled Hem with 3 and 2 Threads, Lettuce Edging, Picot Stitch

    • BERNINA L 850 Overlocker/Serger: Flatlock with 3- and 2-Threads

      BERNINA L 850 Overlocker/Serger: Flatlock with 3- and 2-Threads

    • BERNINA L 850 Overlocker/Serger: 2-Thread Blanket Stitch, 2-Thread Overlock

      BERNINA L 850 Overlocker/Serger: 2-Thread Blanket Stitch, 2-Thread Overlock

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    • BERNINA L 850 Overlocker/Serger: Stitch Optimization 4- and 3-Thread Overlock

      The sewing result depends on fabric, threads and needles as well as stitch length and differential feed. To allow the threads to interlock loosely it is recommended to decrease thread tension before increasing other thread tension, to prevent fabric puckering. In this video you will see how to optimize stitches. How to fine tune thread tensions. Why decrease thread tension. How to increase thread tension. How to prevent loose needle thread tension. How to balance looper threads. How to increase the elasticity of the seam

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization 3-Thread Superstretch, 2-Thread Wrapped Overlock

      The sewing result depends on fabric, threads and needles as well as stitch length and differential feed. To allow the threads to interlock loosely it is recommended to decrease thread tension before increasing other thread tension, to prevent fabric puckering. In this video you will see how to optimize stitches. How to fine tune thread tensions. Why decrease thread tension. How to increase thread tension. How to prevent loose needle thread tension. How to balance looper threads. How to increase the elasticity of the seam.

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Rolled Hem, Picot Stitch

      The sewing result depends on fabric, threads and needles as well as stitch length and differential feed. To allow the threads to interlock loosely it is recommended to decrease thread tension before increasing other thread tension, to prevent fabric puckering. In this video you will see how to optimize stitches. How to fine tune thread tensions. Why decrease thread tension. How to increase thread tension. How to prevent loose needle thread tension. How to reduce loose loops of the upper looper. How to reduce seam puckering

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Flatlock

      The sewing result depends on fabric, threads and needles as well as stitch length and differential feed. To allow the threads to interlock loosely it is recommended to decrease thread tension before increasing other thread tension, to prevent fabric puckering. In this video you will see how to optimize stitches. How to fine tune thread tensions. Why decrease thread tension. How to increase thread tension. How to prevent loose needle thread tension. How to reduce loose loops of the upper looper. How to reduce seam puckering.

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization: 2-Thread Flatlock, 2-Thread Overlock, 2-Thread Blanket Stitch

      The sewing result depends on fabric, threads and needles as well as stitch length and differential feed. To allow the threads to interlock loosely it is recommended to decrease thread tension before increasing other thread tension, to prevent fabric puckering. In this video you will see how to optimize stitches. How to fine tune thread tensions. Why decrease thread tension. How to increase thread tension. How to prevent loose needle thread tension. How to balance looper threads.

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Rolled Hem with Metallic Thread

      The sewing result depends on fabric, threads and needles as well as stitch length and differential feed. To allow the threads to interlock loosely it is recommended to decrease thread tension before increasing other thread tension, to prevent fabric puckering. In this video. How to optimize stitches for a 3-thread rolled hem with metallic thread. How to fine tune thread tensions. Why decrease thread tension. How to increase thread tension. How to prevent loose needle thread tension. How to balance looper threads.

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization 4- and 3-Thread Overlock

      BERNINA L 850 Overlocker/Serger: Stitch Optimization 4- and 3-Thread Overlock

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization 3-Thread Superstretch, 2-Thread Wrapped Overlock

      BERNINA L 850 Overlocker/Serger: Stitch Optimization 3-Thread Superstretch, 2-Thread Wrapped Overlock

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Rolled Hem, Picot Stitch

      BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Rolled Hem, Picot Stitch

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Flatlock

      BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Flatlock

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization: 2-Thread Flatlock, 2-Thread Overlock, 2-Thread Blanket Stitch

      BERNINA L 850 Overlocker/Serger: Stitch Optimization: 2-Thread Flatlock, 2-Thread Overlock, 2-Thread Blanket Stitch

    • BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Rolled Hem with Metallic Thread

      BERNINA L 850 Overlocker/Serger: Stitch Optimization: 3-Thread Rolled Hem with Metallic Thread

      We use the YouTube service to display videos. This service may collect data about your activities. For more information, please see our Privacy Policy. To view the video, please accept "Targeting cookies."

    • BERNINA L 850 Overlocker: Overlocker Maintenance: Cleaning and Oiling

      Tips how to clean the sewing area, knives, loopers and feed dog. How to oil the upper looper. Tips how to clean the air-threader pipes. How to clean the thread cutter.

    • BERNINA L 850 Overlocker: Overlocker Maintenance: Cleaning and Oiling

      BERNINA L 850 Overlocker: Overlocker Maintenance: Cleaning and Oiling

    Support for your BERNINA L 850

    To ensure that you enjoy your BERNINA for as long as possible, we recommend that you read the detailed operating instructions. Further support information and firmware updates can be found on the support page.

    Download manual Support page BERNINA L 850

    Sewing project

    This reversible bomber jacket provides an absolutely cool appearance everywhere. It can be sewn together quickly and is definitely an eye-catcher.

    Go to the sewing project

    Personal advice at your Local BERNINA Store

    Over 2,000 BERNINA Stores worldwide offer valuable services to all our customers. Your local BERNINA Store is there to proudly help you, with advice on machines and accessories that best suit your needs, selection of BERNINA Embroidery Software and also in servicing your BERNINA.

    Find your local store

    We want you to love your BERNINA

    We challenged ourselves, pushed boundaries, poured over plans and engineered a machine you will love.