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.

Take a spin

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, with BERNINA Embroidery Software and also in servicing your BERNINA.

Features & Functions

  • Overview
  • Stitch Variations
  • Technical Specifications
  • Comfort Features
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.

Stitches 18

Stitches

A variety of wide and narrow, long and short stitches for all your sewing projects.
Overlock Stitch Width

Overlock Stitch Width

The Overlock Stitch Width is adjustable to suit any fabric type and sewing technique. Wide stitches are suitable to sew and neaten medium to heavy weight fabrics, narrower stitches for medium to light weight and fine fabrics.
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.
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.
Built-in Needle Threader

Built-in Needle Threader

The Built-in Needle Threader located at the needle bar area easily switches to thread the needles.
Swing-out Presser Foot with Auto Swing Back

Swing-out Presser Foot with Auto Swing Back

The Presser Foot swings to the left, providing ample space for easy threading, comfortable needle changing and to easily lay the threads under the Presser Foot. When lowering the presser foot with the hand lifter it swings automatically back.
Freearm

Freearm

Freearm for easy sewing of tubular projects such as cuffs, legs and necklines.
BERNINA Free Hand System (FHS) with Knee Lifter

BERNINA Free Hand System (FHS) with Knee Lifter

Use the knee-operated lever to lower or temporarily raise the Presser Foot allowing your hands to manage your project at all times.
Automatic Needle Stop Up

Automatic Needle Stop Up

The needle always stops in the highest position at the end of each stitch. Ideal to thread the needles, position or remove the sewing project.
Easy to Engage and Disengage Knife from Outside

Easy to Engage and Disengage Knife from Outside

The Knife On/Off Lever is positioned on the outside of the machine. The upper knife is quickly disengaged with one finger when opting not to trim. It is also easily accessible while sewing.
Sewing speed, stitches per minute 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.

Stitches 18

Stitches

A variety of wide and narrow, long and short stitches for all your sewing projects.
4-Thread Overlock with Integrated Safety Seam 1
#

4-Thread Overlock with Integrated Safety Seam

The 4-Thread Overlock is a sturdy and strong stitch, most often used for durable and elastic seams in knits and stretchy fabrics. It is suitable for apparel, especially for sportswear, and home textiles.
3-Thread Super Stretch Stitch 1
#

3-Thread Super Stretch Stitch

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 lingerie and gymnastic wear, is achieved by using a texturized nylon thread in the looper (and needles). Decorative threads are used to neaten and create reversible edges.
3-Thread Overlock Wide (LN) 2
#

3-Thread Overlock Wide (LN)

The 3-Thread Overlock is a balanced seam and also ideal for neatening edges, hems and facings, quicksewn edge finishing and effect seams. Wide 3-Thread Overlock is suitable for strong woven fabrics, pile, furry materials or sturdy knits, for garments and decorative projects.
3-Thread Overlock Narrow (RN) 2
#

3-Thread Overlock Narrow (RN)

The 3-Thread Overlock is a balanced seam and also ideal for neatening edges, hems and facings, quicksewn edge finishing and effect seams. Narrow 3-Thread Overlock is suitable for fine to medium weight fabric neatening, t-shirts, children's garments, lingerie and fine home textiles.
3-Thread Flatlock Wide (LN) 2
#

3-Thread Flatlock Wide (LN)

The 3-Thread Flatlock is a flat, slightly 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. A wide 3-Thread Flatlock is used in medium to heavy weight fabrics. Suitable for patchwork, apparel and sportswear and home textiles
3-Thread Flatlock Narrow (RN) 2
#

3-Thread Flatlock Narrow (RN)

The 3-Thread Flatlock is a flat, slightly 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 as a base to weave tape or cord into the stitch. A narrow 3-Thread Flatlock is used in medium to light weight fabrics. Suitable for patchwork, apparel, sportswear, lingerie and home textiles.
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 inserting lace, light weight apparel, blouses, children's garments, accessories.
3-Thread Rolled Hem 1
#

3-Thread Rolled Hem

A rolled hem is an attractive and quickly sewn decorative edge finish, for example with embroidery thread in the loopers. The rolled hem can also be used for pintucks in heirloom projects. Suitable for accessories, ruffles, light weight outerwear, home textiles.
3-Thread Picotstitch 1
#

3-Thread Picotstitch

The 3-Thread Picotstitch is an attractive and quickly sewn edge for light weight woven and knitted fabrics. Suitable for scarfs, bridal wear and ruffles, home textiles and decorative craft projects.

Product brochure – All information at a glance

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2-Thread Wrapped Overlock Wide (LN) 2
#

2-Thread Wrapped Overlock Wide (LN)

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. The wide stitch is suitable for medium weight to heavy weight fabrics and threads.
2-Thread Wrapped Overlock Narrow (RN) 2
#

2-Thread Wrapped Overlock Narrow (RN)

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. The narrow stitch is suitable for medium weight to light weight fabrics and medium weight to finer threads.
2-Thread Flatlock Wide (LN) 2
#

2-Thread Flatlock Wide (LN)

The 2-Thread Flatlock is a highly stretchy and flat stitch, often used with decorative threads or texturized nylon thread for lingerie, swimwear and gymnastic wear. The wide stitch is suitable for medium to heavy weight woven and knitted fabrics, patchwork, apparel and craft projects.
2-Thread Flatlock Narrow (RN) 2
#

2-Thread Flatlock Narrow (RN)

The 2-Thread Flatlock is a highly stretchy and flat stitch, often used with decorative threads or texturized nylon thread for lingerie, swimwear and gymnastic wear. The narrow stitch is suitable for medium to light weight woven and knitted fabrics, patchwork, apparel and craft projects.
2-Thread Rolled Hem 1
#

2-Thread Rolled Hem

With rolled hems, achieve fine edge finishing on hems, ruffles and flounces, ideal for bridal wear, or lingerie. With Differential Feed, stretching, it is often used as lettuce edge finish in knits.
2-Thread Overlock Wide (LN) 2
#

2-Thread Overlock Wide (LN)

The 2-Thread Overlock is ideal for neatening fine single layers of fabric and ensures no seam puckering. The wide stitch is suitable also for heavier weight but loosely woven fabric neatening with texturized nylon or universal thread, use for apparel or home textiles.
2-Thread Overlock Narrow (RN) 2
#

2-Thread Overlock Narrow (RN)

The 2-Thread Overlock is ideal for neatening fine single layers of fabric and ensures no seam puckering. The narrow stitch is ideal for finest silk and batiste or knitted fabrics to be neatened with fine texturized nylon or fine threads, for apparel or home textiles.
2-Thread Blanketstitch Wide (LN) 2
#

2-Thread Blanketstitch Wide (LN)

The 2-Thread Blanketstitch is used on ready-made blankets or on heavier fabrics with longer stitch and maybe more cutting width and with decorative threads in needle and looper. Suitable for medium to heavy weight fabrics and knits, pile and furry material, decorative finishing on apparel, coats, jackets and home textiles.
2-Thread Blanketstitch Narrow (RN) 2
#

2-Thread Blanketstitch Narrow (RN)

The 2-Thread Blanketstitch is used on ready-made blankets or on heavier fabrics with longer stitch and maybe more cutting width and with decorative threads in needle and looper. Suitable for medium weight and soft fabrics and knits, pile and furry material, decorative finishing on apparel, coats, jackets and home textiles.
Overlock Stitch Width

Overlock Stitch Width

The Overlock Stitch Width is adjustable to suit any fabric type and sewing technique. Wide stitches are suitable to sew and neaten medium to heavy weight fabrics, narrower stitches for medium to light weight and fine fabrics.
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 1500

Product brochure – All information at a glance

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6-step presser foot pressure

6-step presser foot pressure

Presser foot pressure is adjustable to accommodate sheer to thick fabrics.
Weight of machine 12.3 kg
Stitch Selection with Stitch Chart

Stitch Selection with Stitch Chart

Select a stitch from the stitch chart, set the machine accordingly before threading accordingly.
Total Stitch Control

Total Stitch Control

Individually adjustable settings such as Thread Tension for each Needle and Looper, Stitch Length, Differential Feed, Cutting Width, Micro Thread Control, Presser Foot Pressure, and Rolled Hem settings allow for perfecting stitches when using a wide variety of fabrics and thread combinations.
Thread Tension Adjustment

Thread Tension Adjustment

Infinitely variable and easily adjustable, the Thread Tension Dials ensure quick and accurate set-up for all projects.
Stitch Length Adjustment 0.8–4.5 mm

Stitch Length Adjustment

With a variable, easily accessible, numbered dial on the exterior of the machine, stitch length can be adjusted, even while sewing.
Stitch Length Fine Adjustment for Rolled Hem

Stitch Length Fine Adjustment for Rolled Hem

The Stitch Length Adjustment between 0.8 and 1.5 is very fine, so that rolled hems can be fine-tuned in delicate fabrics for the perfect match of fabric and thread.
Differential Feed Adjustment

Differential Feed Adjustment

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 outside right, adjustments to the fabric feed can be made even while sewing
Cutting Width

Cutting Width

The Cutting Width Dial on the front of the machine can be adjusted to accurately set up seam width, and is adjustable even while sewing
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.
Rolled Hem Selection Lever

Rolled Hem Selection Lever

The Rolled Hem Selection Lever is built in next to the Stitch Plate and eases switching to a Rolled Hem stitch and back to overlock by simply moving the Rolled Hem Selection Lever.
Stitch Finger Adjustable

Stitch Finger Adjustable

The Stitch Finger supports the looper threads to build the stitch. It moves with the cutting width adjustment to hold more or less thread and can be fine-tuned using Micro Thread Control.
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.
Pulse Drive (L 850/L 860)

Pulse Drive

When stepping on the BERNINA Foot Control with the Threader Cover and/or Looper Cover open, the machine will sew slowly for a maximum of one stitch, until the machine is in threading position.
Thread Feed Into Air Threader Nozzle

Thread Feed Into Air Threader Nozzle

With closed BERNINA Air Threader pipes, the thread is pulled into the Air Threader as soon as the foot control is pressed. The thread tail needs only to hover above the nozzle to be pulled into the Air Threading System and into loopers. No need to place thread tail into nozzle for threading to occur properly.
Color-coded One-path Threading

Color-coded One-path Threading

The thread follows one defined path for each stitch. The threading paths are always the same, and color coded.
Can be used with any sequence of threads

Can be used with any sequence of threads

Thread in any order because the Looper Threads are in closed pipes that avoid unintentional tangling of needle and Looper Threads.
Threading Chart

Threading Chart

A Color-coded Threading Chart is located inside the looper or threader cover. The threading path of each thread can be verified.
Stitch Diagram

Stitch Diagram

The Stitch Diagram is ideally printed next to the Thread Tension Dial and eases verifying thread tension and threading path.
Built-in Needle Threader

Built-in Needle Threader

The Built-in Needle Threader located at the needle bar area easily switches to thread the needles.
Needle Checking Window

Needle Checking Window

This window on the Needle Bar provides for clear viewing of proper installation of needles.
Needle Screws Securing Plate

Needle Screws Securing Plate

The Securing Plate ensures that unused screws will not get lost.
Thread Tension Release

Thread Tension Release

As soon as the Presser Foot is lifted, the thread tension discs release automatically and allow easy, tension-free threading.
Swing-out Presser Foot with Auto Swing Back

Swing-out Presser Foot with Auto Swing Back

The Presser Foot swings to the left, providing ample space for easy threading, comfortable needle changing and to easily lay the threads under the Presser Foot. When lowering the presser foot with the hand lifter it swings automatically back.

Product brochure – All information at a glance

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Air Threader Circumvention

Air Threader Circumvention

The advantage of bypassing part of the air pipes is to reduce friction, thus tension and a good sewing result can be achieved for longer and wider stitches.
Freearm

Freearm

Freearm for easy sewing of tubular projects such as cuffs, legs and necklines.
BERNINA Free Hand System (FHS) with Knee Lifter

BERNINA Free Hand System (FHS) with Knee Lifter

Use the knee-operated lever to lower or temporarily raise the Presser Foot allowing your hands to manage your project at all times.
Grand Sewing Space

Grand Sewing Space

More space to the right of the needles offers comfort and more flexibility when stitching large and small projects. Ideal for handling from the right when the left hand is holding fabric and notions in place.
Space to the Right of the Needle 143 mm

Space to the Right of the Needle

More space to the right of the needles offers comfort and more flexibility when stitching large and small projects. Ideal for handling from the right when the left hand is holding fabric and notions in place.
LED Sewing Light

LED Sewing Light

LED Sewing Light illuminates the sewing and looper area making it easier to thread the needles and loopers. Eye strain is reduced while stitching projects in a brightly lit area.
Stitch-by-Stitch Sewing

Stitch-by-Stitch Sewing

The DC Motor provides consistent needle penetration at any speed, from sewing fine single layer to heavy multi-layer fabrics. In particular, it also allows for slow, precise sewing.
Automatic Needle Stop Up

Automatic Needle Stop Up

The needle always stops in the highest position at the end of each stitch. Ideal to thread the needles, position or remove the sewing project.
BERNINA Foot Control

BERNINA Foot Control

Use the BERNINA Foot Control for accurate stitch-by-stitch precision and the benefit of needle up/down using the Foot Control with Back-kick function.
2-step Presser Foot Lifter

2-step Presser Foot Lifter

The 2-Step Presser Foot Lifter provides additional clearance under the foot when placing multiple layers or bulky fabrics.
Thread Cutter

Thread Cutter

The Thread Cutter with clamp function is conveniently positioned on the outside of the machine. It cuts thread chains and loose threads neatly. It holds the thread chain out of the way ready to start the next seam.
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.
Accessories in Threader Cover

Accessories in Threader Cover

Most important and frequently used tools are always at hand, ready to be used, no searching or wasting time.
Needle Pad

Needle Pad

Needles that are not in use can be stored in the Needle Pad under the Threader Cover, always within easy reach.
Easy to Engage and Disengage Knife from Outside

Easy to Engage and Disengage Knife from Outside

The Knife On/Off Lever is positioned on the outside of the machine. The upper knife is quickly disengaged with one finger when opting not to trim. It is also easily accessible while sewing.
Speed Selection Switch

Speed Selection Switch

Sewing top speed can be reduced via the Speed Selection Switch to accommodate sewing projects that require slower but even sewing speed.
Safety Switch for Needle Threader

Safety Switch for Needle Threader

Safety Switch to cut electrical supply to motor when Needle Threader is active.
Presser Foot Safety Switch

Presser Foot Safety Switch

Safety Switch to cut electrical supply to motor when Presser Foot is lifted so the machine will not sew. Also when temporarily raising the Presser Foot with the Knee Lifter, the machine will not sew.
Safety Switch for Open Cover, Pulse Drive

Safety Switch for Open Cover, Pulse Drive

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.
Carry Handle and Recessed Grip

Carry Handle and Recessed Grip

Fold-down Carry Handle on top to the left of the threading path with additional Recessed Grip at lower right for stable carrying of the machine, even while threaded.
Knife Cover Insert

Knife Cover Insert

The Knife Cover Insert is used with all overlock stitches with upper and lower looper, allowing to cut, sew and neaten. It guides the fabric trimmings smoothly into the Cut-offs Bin, while protecting your fingers in the knife area.
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.

Accessories

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

  • Included
  • Compatible
Show all Hide all

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

Tutorials

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

  • 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

  • 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

  • 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

  • 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, with BERNINA Embroidery Software and also in servicing your BERNINA.

We want you to love your BERNINA

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