Sailrite® Ultrafeed® LS-1 PREMIUM Sewing Machine With WorkerB® Power Pack (110V)
SKU: 311503
2 Available


The Sailrite® Ultrafeed® LS-1 PREMIUM Sewing Machine With WorkerB® Power Pack is unmatched in power and portability. For the first time ever, experience unrivaled power and control in a portable machine. Sailmaking, canvaswork, upholstery work, leatherwork and hobby sewing — the Ultrafeed will elevate your sewing and deliver professional results like never before.


What Is an Ultrafeed®?

The Ultrafeed LS-1 is a portable heavy-duty straight-stitch sewing machine. The Ultrafeed is extremely versatile. It has the ability to sew incredibly thick, dense assemblies as well as lightweight home fabrics. You can also easily adjust the speed control dial for stitch-by-stitch sewing or faster, production-level output. These features, and many more, make the Ultrafeed the perfect machine for both beginners and seasoned sewers alike.

The body and internal components are all made of robust, high-quality metal, making it a machine that will deliver exceptional results year after year. Assembled and tuned by hand at our Indiana facility, each Ultrafeed must meet rigorous quality standards. Your Ultrafeed is examined and tested by Sailrite-certified sewing technicians before it’s packaged and shipped.

When you buy an Ultrafeed, you get more than just a machine. You’ll receive Sailrite’s unparalleled customer support and constantly expanding instructional videos. Sailrite is a family-owned and -operated company with over 50 years in the DIY industry. Your Ultrafeed makes you part of that family.


What Can It Sew?

In short, almost anything. The Ultrafeed powers through the heaviest materials and thickest assemblies you can fit under the presser foot. Its sewing capabilities have been proven in up to 10 layers of thick material, but it’s versatile enough to sew through lighter home fabrics as well.

Check out what it can sew:

  • Heavy canvas
  • Upholstery fabric
  • Soft to medium leather
  • Vinyl fabric
  • Lightweight home/hobby fabrics
  • Clear vinyl window material
  • Denim
  • Sailcloth
  • And so much more

Let’s Talk About Power!

The WorkerB Power Pack is Sailrite’s all-new motor system exclusively found on Ultrafeed PREMIUM packages (currently 110V only). Here are some key features of the WorkerB Power Pack:

1/4 Horsepower MotorThe most powerful motor found on portable sewing machines, the WorkerB delivers 2.5 times the power of other portable motors.
Power Boosting TechnologyWhen the machine encounters resistance from changes in fabric thickness or density, the control box provides a boost in torque to power through.
Speed ControlEasily adjust the maximum sewing speed with the dial on the control box. Whether your comfort level is stitch-by-stitch precision or 638 stitches per minute, the WorkerB provides maximum power.
Added Safety FeaturesAn on/off switch allows you to shut the motor off with the machine plugged in. If the foot pedal is accidentally pressed, the machine won’t run and the needle won’t move. This is a great safety feature if you have small children or pets.

I’m a Beginner — Is This Machine for Me?

Don’t be intimidated by the robust look of the Ultrafeed. This is a great beginner sewing machine. We’ve made the Ultrafeed intuitive and easy to learn. Plus, as an Ultrafeed owner, you have access to the best tutorial and support videos on the market. And our full-color, in-depth guidebook covers everything you’ll ever need to know about your machine.

Take a look at some of the features that make the Ultrafeed a perfect beginner’s machine:

EZ Set™ Stitch Length PlateEasily adjust your stitch length for precise, consistent stitching in both forward and reverse.
Monster® II Balance WheelWe all learn at different speeds, and the Monster II delivers the ultimate stitch-by-stitch control so you can sew as slowly as you need to. It also comes with a hand crank for sewing without electricity.
Walking Foot TechnologyThe machine feeds for you, you just have to guide the material. This way, you can focus on what you are sewing.
Flex20 LED LightIt sounds simple, but good lighting can make or break a project. The Flex20 provides bright, concentrated light, and the flexible neck lets you position the light right where you need it. With the WorkerB Power Pack, we’ve built an outlet directly into the control box so you won’t have to find yet another outlet near your sewing station. A Note About the Integrated Light Outlet: Electrical items exceeding 100 watts should not be used in the control box outlet. Exceeding this limit may blow the control box fuse.
Posi-Pin® Safety ShearThis patented sacrificial pin (Patent #7438009) protects your machine from damage. If you sew over something you shouldn’t, the pin will break and your machine will stop operating in order to protect the machine. Pulling the pin out also makes the machine stop working, which is an excellent additional safety feature. As an added perk, it also makes winding bobbins quick and easy. To learn more about our patented Posi-Pin® Safety Shear, read "The Ultrafeed & Posi-Pin: The Perfect Power Couple."
Sailrite SupportWe’ve got hundreds of free videos to help you learn how to do everything from changing the needle to sewing your own pillows and cushions. Whether you’re troubleshooting your machine or in need of project inspiration, our specialists are available by phone, email or online chat to help with whatever you need.

I’m a Professional — Is This Machine for Me?

Upholsterers, seamstresses, leatherworkers and canvasworkers alike have built thriving businesses with the help of their Ultrafeed Sewing Machine. The Ultrafeed has all the features and capabilities you need to get the job done, and it’s durable and versatile enough to be the go-to machine for all of your business needs.

Here are just some of the things that make the Ultrafeed a must-have for professionals:

Portable and PowerfulThe Ultrafeed provides ultimate portability for on-site repair work and sewing jobs, while the WorkerB Power Pack provides unrivaled power. Our heavy-duty Industrial Carrying Case will protect your machine while you sew on the go.
High-Quality ConstructionQuality begins with the machine’s foundation. The Ultrafeed’s cast iron body houses the all-metal internal components for long-lasting performance.
Variable Speed ControlFrom stitch-by-stitch precision to over 600 stitches per minute and everywhere in between, the Ultrafeed accommodates sewers at every skill level, so training new sewers is a breeze.
Thread Size RangeThe Ultrafeed is compatible with thread sizes ranging from general-purpose/home thread to V-92 (Tex 90) weight thread.
Sailrite SupportWe’ve compiled hundreds of support videos to help you troubleshoot the machine yourself without having to wait on a machine technician.

How Is the Ultrafeed Different From a Home Machine?

Power is the name of the game. Where home machines lack power and control when sewing through multiple layers, the Ultrafeed delivers — every single time. Its unique ability to sew with slow, stitch-by-stitch precision in thick or dense materials makes it an industry game changer. The robust, all-metal internal components won’t wear and break down like plastic parts in home machines, which means less time fixing and troubleshooting your machine and more time sewing.


Where Is the Ultrafeed Made?

We pride ourselves on our hands-on dedication and commitment to our proprietary sewing machines. That’s why each and every Ultrafeed is assembled, fine-tuned and inspected by our highly trained machine technicians at our Indiana facility. We even include sewn-off samples of material proving that the machine has been tested for quality assurance. Every Ultrafeed is thoroughly examined and signed off by one of our senior technicians who has worked in our sewing department for at least six years and has passed a rigorous training program.


The Sailrite Support Guarantee

We are committed to helping you get the most out of your Ultrafeed Sewing Machine. That’s why we offer you personalized support for the lifetime of your machine. We’ll be here to help you service your machine with in-depth videos, one-on-one support and Sailrite’s five-year limited warranty (see Warranty PDF below). Should you need them, we have replacement parts in stock and ready to ship out to you and, if all else fails, you can always send your machine back to us for repairs.

Why Should I Choose an Ultrafeed?

The Ultrafeed is a groundbreaking piece of sewing machine technology. No other portable machine comes close to comparison. But don’t just take our word for it! Read what verified Ultrafeed owners have to say about their machines:

"I am an experienced woodworker and leatherworker who decided to venture into sewing to complement my current endeavors and expand into commercial fabrics. I looked at all the options, and chose to get a new Sailrite Ultrafeed LS1 for these reasons: 1) quality, 2) support, 3) products, and 4) how-to videos. I'm so glad I did. The videos have been great in getting me started and finishing my "learning" projects. My machine was ready to sew out of the box (all I had to do was load thread) and has worked flawlessly." – Jason S.

"This spring I decided to tackle making boat cuhishions and combing bolsters myself to save some money. After doing a good amount of research I decided on the LS-1. I read a lot of good reviews and watched a bunch of Sailrite's videos. I ordered all the supplies I needed and the machine showed up within a week. Right out of the box, I was impressed by the commercial feel of the machine. I used the helpful installation and assembly instructions and also watched the included DVD on how to get started. This Saturday I worked on my first cushion. While referencing the website, I successfully finished a great-looking cushion. I was surprised by how well the machine worked, and was surprised that someone as new to the process as I am could make such a nice looking product. I would highly recommend this machine for anyone who likes to tackle DIY projects." – Edward J.

"This is a well built, heavy duty machine. I sewed some heavy Sunbrella with it. It had no problems whatsoever going through multiple layers. I also sewed some binding with it using the binding tool. It was very easy and the finished product was quite professional-looking. This machine is very compact, it would be great for someone who is limited on space or just wants to be able to clear their work area when finished. It does have the power and the "punch" the bigger machines do and will definitely surprise you." – Mark V.

"I bought this sewing machine for my mom who has been sewing since she was a kid. I have never sewn anything before and I'm in my 40s. The machine was incredibly easy to learn on and I'm probably a little spoiled since this is the only machine I've used. ... The stitches on this machine can be adjusted to get that true professionally upholstered finish. The backstitch mechanism works great and is easy to get the hang of. I wish I had just bought this Sailrite machine in the beginning, as it's well worth the money..." - Chris F.

Save yourself time, headaches and ruined material. Choose the Ultrafeed and never look back.

What Is Included in My Ultrafeed PREMIUM Package?

  • Sailrite® WorkerB® Power Pack - 2.5 times the power of other portable motors
  • Sailrite® WorkerB® Balance Wheel - grooved edge offers better grip when operating the machine by hand
  • Ultrafeed® Industrial Carrying Case - specially designed foam pads protect your machine, even on its side
  • Elastic Protector Strap - protects clear window vinyl and delicate materials while sewing
  • Integrated Thread Stand - attaches to the carrying case to feed thread from an optimal position
  • Sailrite® Flex20 LED Light - bright, concentrated light right where you need it
  • Sailrite® Monster® II Balance Wheel - maximum slow-speed control for beginners and those wanting stitch-by-stitch precision for detailed work
  • Sailrite® 1" Swing-Away Binder - evenly feeds and folds binding for hassle-free edge finishing
  • EZ Set™ Stitch Length Plate - set stitch length in forward and reverse with ease
  • Sailrite® Deluxe 5-1/2" Magnetic Sewing Guide - ensures your stitches are straight and evenly positioned from the fabric edge. Think of it like a table fence for a saw.
  • Sailrite® Kickstand for Ultrafeed® - prevents your machine from toppling over when it is hinged back inside the carrying case
  • Left Roping Zipper Foot - designed to sew zippers and boltropes
  • Double Cording Foot Set - designed to double welt trim for upholstery projects
  • Needle Assortment Pack with Deluxe Seam Ripper & Lint Brush
    • #14 Round Point (Sharp) Needles (10 pack) - for thin fabric assemblies
    • #16 Round Point (Sharp) Needles (10 pack) - for medium fabric assemblies
    • #18 Round Point (Sharp) Needles (10 pack) - for thick fabric assemblies
    • #20 Round Point (Sharp) Needles (10 pack) - for heavy duty fabric assemblies
    • Double-sided lint brush - great for cleaning the machine
    • Deluxe Seam Ripper - removes stitches if a mistake is made
  • V-92 White Polyester Thread - use with #18 and #20 needles
  • Electronic variable speed foot control - large range of pedal movement provides unrivaled slow speed acceleration
  • Sewing machine oil - keeps your machine running smoothly
  • 4 bobbins - enough to finish most projects
  • Tool kit - great for maintenance
  • Comprehensive Guidebook - clear, easy-to-read user manual with full-color, step-by-step photography
  • Five-year limited warranty - we support your machine so you can sew worry-free


Machine Series: Ultrafeed LS-1
Sewing Speed: 304 stitches/minute (with Monster II Balance Wheel), 638 stitches/minute (with WorkerB Balance Wheel)
Straight Stitch Length: Max. 6mm
Presser Foot Lift: 3/8"
Feed Type: Walking Foot
Shuttle: Oscillating (Cam/Rocker Arm Driven)
Power: 90VDC, 1/4 hp, 3 amps
Motor RPM: 5,800
Needle Bar Stroke: 34mm
Lubrication: Manual
Underarm Space: 7" x 4.5"
Bed Size: 14.5" x 7"
Carrying Weight: 61 lbs
Bobbin Size: Class 15 / Style A
Compatible Needles: System 135 x 16, System 135 x 17
Needle Size Range: #10–#22
Thread Size Range: Home–V-92
Brand: Sailrite
Thread Take-Up Lever: Link Type
Case Dimensions: 21 3/4" W x 10 5/8" D x 14 5/8" H
Input Watts: 375
Output Watts: 350 (Max.)
Amperage: 0.38 (Starting); 3 (Max.)
Input Voltage: 110V A.C.
Warranty: 5 Years

Ultrafeed Sewing Machines are assembled in the United States with components from the United States, Taiwan and China.

WorkerB Power Packs are designed to work on inverters/generators of 400W or more of the Modified Sine Wave or Square Wave types. Pure (or Digital Synthesized Wave) Inverters/generators can disrupt the “phase cutting” technology of the WorkerB since they hide high-frequency current in the waveform.


Sailrite® Ultrafeed® LS-1 PREMIUM Sewing Machine With WorkerB Power Pack

Ultrafeed LSZ-1 PREMIUM package shown.

Introducing the Ultrafeed® Walking Foot Sewing Machine

PREMIUM machine shown without WorkerB Power Pack.

Ultrafeed® LS-1 Sewing Demo

PREMIUM machine shown without WorkerB Power Pack.

WorkerB® Power Pack Slow Speed Control Demo


Overall Rating : 4.87 23 Reviews

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Rene Bellis
Verified Purchase

Very happy with my machine!

I love my new Sailrite Ultrafeed LS-1 Machine! It handles heavy duty projects with ease. This is my first industrial machine and I am please with how easy it is to operate. The only problem I’ve experienced is the tension sometimes seems to get tight and needs adjusting, which is easy. I bought this machine so I can tackle upholstery work and sewing through thicker fabrics that are doubled or tripled, depending on what I’m making. I’ve been working on cushions for a sailboat and have been using my Bernina as well as my Ultrafeed in tangent. I love how durable the stitches are, basically indestructible! I will be using this machine a lot.

Verified Purchase

Better than other similar machines

I spent a few hours trying to figure out why I cannot install the Monster II balance wheel but then I gave up and contacted the support team. They tried to guide me step by step but that didn't help, so I made a quick video about the machine I received and how it would not be so easily to install the timing belt as in their videos. After they watched it, they realized the belt I had was not okay, it was labeled 186XL but it was slightly shorter. They shipped me another one free of charge, with deliver to the Netherlands! Overall, this machine is more expensive than others which are similar in design, but at least you have customer support and you can get spare parts and upgrades. And upgrading from a cheaper machine, this was all worth it as the Sailrite is a much better machine.

Brenda J Gilbertson
Verified Purchase

Love my LS-1 Premium❤️

So far, I love this machine! Plenty of power, great speed control and quiet. The worker B power pack and the monster wheel are a must! I don’t think I will ever regret this purchase! Quality product!!

Deborah Scott
Verified Purchase


I'm in love with this machine!!!! I researched sewing machines for months before I decided on the Sailrite Ultrafeed LS-1 Premium. We had a little problem putting on the motor case. My husband broke it and we had to order a new one. My old bobbins from my Brother sewing machine works in my new Sailrite! So glad I didn't throw them in the trash. I am so glad I chose this machine! This is the best investment I've made for my business to-date! This machine sews like a dream! My husband calls me Busy-B. Good fit for my new Worker B! Talking about the best of the best! Purse making is a joy now, not a chore! Thank you Sailrite! And the best part of all is it's MADE IN AMERICA!

Cayley de Brouwer
Verified Purchase

Happily Sewing Away

This machine is everything I was hoping it would be. I am using it for upholstery purposes and the walking foot is making my life so much easier than it used to be.

Wendy Hazen
Verified Purchase

This machine is a beast. The You tube tutorial has been an excellent resource for set up and operating I found the book that came with it a little hard to use. Everything arrived in excellent condition.

Vickie Williams
Verified Purchase

I love this machine. I don't have room for an industrial sewing machine, but couldn't sew bags on my domestic - it just didn't have enough power. So I decided to try the Sailrite. I'm so glad I did. It sews like a charm. There are lots of videos to help with setting it up and using it. I've sewn a couple of bags on it now using waxed canvas and vinyl and have had no trouble at all. I would highly recommend this machine to anybody who wants to work with heavier materials.

Karen Bartzer
Verified Purchase

Powerful machine!

For me, this was one of the best gifts to add to my sewing room. No worries now when sewing layers of denim, canvas or leather. Happy sexist!!

Pam Craft
Verified Purchase

I absolutely love this sewing machine. Better yet, there are videos to learn how to sew almost anything!

rochelle tomic
Verified Purchase

I'm still learning, but overall know I made the right choice with this make and model!

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