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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

Overview
Image Gallery
Features & Functions
Accessories
Tutorials
Support

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

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

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

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

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

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, selection of BERNINA Embroidery Software and also in servicing your BERNINA.

Find your local store

Image Gallery: Explore the BERNINA L 850

Features & Functions

Overview
Technical Specifications
Comfort Features
Stitch Variations

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.

3– 9 mm overlock seam width
Weight of machine	12.3 kg
6-step presser foot pressure

Product brochure – All information at a glance

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Motor	DC
Sewing speed, stitches per minute	400-1500

One-step BERNINA Air Threader (for looper threads)
Freearm
Sewing space to the right of the needle	143 mm
BERNINA Free Hand System (FHS) with knee lifter
Speed selection switch
Integrated upper looper converter
Easy to engage and disengage the knife from outside
Rolled hem lever integrated under stitch plate
Adjustable cutting width while sewing
Thread tension release when presser foot raised
Adjustable thread tension while sewing
2-step presser foot lifter with front-foot-lift
Swing-out presser foot with auto swing back
Workspace height	86 mm

Product brochure – All information at a glance

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Built-in needle threader
Color-coded threading path
Needle up/down with BERNINA foot control
Automatic needle stop up
Stitch length fine tuning for rolled hem
Stitch-by-stitch sewing
Micro Thread Control (mtc)
Adjustable stitch length while sewing
Adjustable differential feed while sewing
Safety switch for open cover and raised presser foot
2 LED sewing lights
Thread cutter
Accessories in the threader cover

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.

Learn more

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

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.

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Slide-on Table (L 8 Series)

The Slide-on Table for the L 8 Series 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.

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BERNINA Tweezers

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

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Brush (L 8 Series)

This tool helps to remove dust and lint from the looper and stitch-plate area of your L 8 Series.

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Screwdriver

The Screwdriver makes changing needles simple.

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Spool Stabilizer for (L 8 Series)

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

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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.

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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.

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Cut-offs Bin (L 850/890)

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.

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Right seam guide (L 850/890)

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.

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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.

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: Stitch Selection, Symbols, Operating Elements
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: Needle Threading
BERNINA L 850 Overlocker/Serger: Changing Needles
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: 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: 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: Flatlock with 3- and 2-Threads
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 Overlock: 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 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 Flatlock
BERNINA L 850 Overlocker/Serger: Stitch Optimization: 2-Thread Flatlock, 2-Thread Overlock, 2-Thread Blanket Stitch
BERNINA L 850 Overlock: Stitch Optimization: 3-Thread Rolled Hem with Metallic Thread

BERNINA L 850 Overlock: Overlocker/Serger: 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 Overlock: Overlocker/Serger: 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

Discover the reversible bomberjacket, which makes for a totally cool appearance anywhere. It can be sewn together quickly and is definitely an eye-catcher.

To the sewing project

Personal advice at your Local BERNINA Store

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.

BERNINA L 850

The ultimate Overlocker

BERNINA L 850 – A true masterpiece among sergers

The One-step BERNINA Air Threader

Sew in comfort

Total Stitch Control for perfect seams

Extremely fast, precise & quiet

Quick threading

Grand sewing space

Get a feel for this fantastic machine

Take this machine for a spin with our 360° viewer

Personal advice at your Local BERNINA Store

Image Gallery: Explore the BERNINA L 850

Features & Functions

4-thread overlock

3-thread overlock (wide / narrow)

3-thread super-stretch

3-thread flatlock ( wide / narrow)

3-thread narrow seam

3-thread rolled hem

3-thread picot stitch

2-thread rolled hem

2-thread wrapped overlock (wide / narrow)

2-thread overlock (wide / narrow)

2-thread blanket stitch (wide / narrow)

2-thread flatlock (wide / narrow )

Accessories

Standard accessories BERNINA L 850

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

Slide-on Table (L 8 Series)

BERNINA Tweezers

Brush (L 8 Series)

Screwdriver

Spool Stabilizer for (L 8 Series)

Overlocker Oil

Accessories Box (L 8 Series)

Knee lifter/Free Hand System (FHS)

Cut-offs Bin (L 850/890)

Right seam guide (L 850/890)

Needle Threader/inserter (L 8 Series)

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.

Accessories for Overlocker

Standard Overlock Foot (with Tape Guide)

Clear Overlock Foot #L27 (L 850)

Elasticator Foot #L14 (L 850)

Elasticator Foot

Blindstitch Foot #L19 (L 850)

Blindstitch Foot

Beading and Sequin Foot #L15 (L 850)

Multi-purpose Foot with Guide

XL Piping Foot (L 8 Series)

Piping Foot #L16S (L 850)

Piping Foot #L16L (L 850)

Cording Foot #L17 (L 850)

Cording Foot

Gathering Foot #L18 (L 850)

Gathering Foot

Curve Foot #L23 (L 850)

Shirring Foot #L24 (L 850)

Decorative Thread Spool Pin #L26 (L 8 Series)

Freearm Cover (L 8 Series)

Brush/Needle Inserter

Spool Stabilizer

Upper Accessories Holder (L 8 Series)

CS Lock Tool

Threading Kit Overlocker/Serger

Accessories Box

OL/CS Height Compensating Tool

Cut-offs Bin

Overlocker Trolley

Adjustable Tape Guide (L 8 Series)

Decorative Threads Guide #L25 (L 850/890)

Right/Left Seam Guides

Needle Threader

Tutorials

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BERNINA L 850 Overlocker/Serger: Getting Started

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

BERNINA L 850 Overlocker/Serger: Upper Looper Converter