BERNINA L850 Air Threader Serger Machine

Achieve Professional Swiss Finishing and Magic Air Threading with the BERNINA L 850 at World Weidner

Bring the legendary precision of Swiss engineering to your finishings with the magnificent BERNINA L 850 computerized air-threading overlock serger. Designed for passionate garment designers, serious quilters, and professional crafters, this heavy-duty workhorse allows you to cut, sew, and perfectly bind raw edges in a single swift operation. World Weidner is proud to highlight this exceptional serger as your ultimate creative companion, delivering durable, commercial-grade seams on all fabric styles—from fine silks and stretchy performance knits to thick denim and multi-layered wool.

Equipped with patented BERNINA innovations like the Free-Hand System (FHS) knee lifter and Micro Thread Control (mtc) for edge-stitch uniformity, the L 850 eliminates wave-formation on activewear knits and prevents puckering in sheer chiffons. Powered by a high-torque pulse drive motor, it offers unmatched speed control, allowing you to cycle smoothly from delicate stitch-by-stitch precision up to a blazing 1,500 stitches per minute. With convenient setup aids such as the automatic needle stop, color-coded threading pathways, and an included slide-on extension table, constructing garments and finishing quilts becomes an incredibly fluid and comfortable experience.

Only available at the World Weidner Creative Center in Oklahoma City. Visit us for an in-store demo!

Machine Specifications

Warranty & Support Peace of Mind: This brand-new BERNINA L 850 is covered by the manufacturer's standard factory warranty, fully backed by World Weidner’s authorized, factory-trained service technicians and lifetime creative support.

Main Features & Creative Benefits

The One-Step BERNINA Air Threader

• Simple threading with high-efficiency air blast support
• Leaves both hands completely free to guide the threads
• Automated looper positioning eliminates handwheel alignment

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 Complete Comfort

• Raise and lower the presser foot hands-free using the knee lifter
• Swing-out presser foot design permits fast, safe needle swaps
• Maintain consistent control over bulky or delicate layers

With the BERNINA Free Hand System (FHS) you can raise and lower the presser foot with your knee, keeping your hands securely on fabric layers for delicate guiding. In addition, the presser foot easily swings out to the side for convenient and safe access to the needles.

Total Control for Flawless Seams

• Change thread tension and cutting width interactively while sewing
• Fine-tune loop overcasting via the patented mtc Edge Adjuster dial
• Fully adjustable differential feed eliminates knits wave or puckers

The L 850 offers several settings for Total Stitch Control, all individually adjustable. The best part? You can modify all of these settings on the fly while actively sewing—including the stitch length, differential feed, cutting width, and Micro Thread Control (mtc).

Color-Coded One-Path Layout

• Built-in Needle Threader facilitates rapid, fatigue-free needle setups
• Color-coded direct pathways allow thread to stay in the same path
• Switch seamlessly from overlock edge seams to rolled hem profiles

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 securely inside the same color-coded threading path.

Grand Workspace and Freearm Space

• Spacious freearm allows sleeves, cuffs, and childrenswear to slide flat
• Slide-on flatbed extension table adds supreme guidance space
• Generous clearance easily accommodates massive garment and quilt bulk

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 cylindrical items with ease by simply sliding sleeves or cuffs over the convenient built-in freearm.

What's Included with the Machine?

Why Buy From World Weidner?

At World Weidner, we provide the ultimate creative foundation for your sewing and quilting studio. By purchasing your new BERNINA L 850 through us, you gain access to an officially authorized dealer with unparalleled customer support and decades of hands-on expertise. To ensure you have everything you need to start creating beautiful quilts and garments right away, World Weidner carries matching accessories such as specialized overlocker presser feet, heavy-duty/universal needles, high-quality sewing threads, quilting rulers, walking feet, extension tables, and other essential notions.

• 60-Day Money-Back Guarantee: We offer a generous 60-day full satisfaction and money-back guarantee for risk-free shopping on your machine.*
• Low Free Shipping Threshold: Enjoy free shipping within the contiguous United States on all qualifying orders over our low minimum threshold.
• Fast Order Delivery: Orders ship quickly from our central Oklahoma warehouse, usually arriving at your doorstep within 1 to 4 business days.
• Loyalty Rewards Program: Earn 5% back on every purchase online and in-store. These points can be saved up and redeemed for discounts on anything we carry.
• Referral Bonus Perks: Take advantage of our "Give $10, Get $10" program that rewards both you and a friend with coupons for future orders and accessories.
• Interest-Free Financing: We partner with popular payment platforms to offer flexible, interest-free installment payments at checkout so you can start creating today.
• Full Manufacturer Warranties: As an officially authorized dealer for every brand we carry, all machine purchases include valid, robust factory warranty coverage.
• In-House Customer Support: Our dedicated, knowledgeable team, including factory-trained service technicians, is available by phone, live chat, or email to assist with machine setup, scheduled maintenance, and project troubleshooting.
• Massive Interactive Showroom: Check out our 18,000-square-foot physical Creative Center in Oklahoma City for hands-on machine testing, direct support, and community classes.