Sailrite® Ultrafeed® LSZ-1 PREMIUM Sewing Machine With WorkerB® Power Pack (110V)
SKU: 311603
8 Available


The Sailrite® Ultrafeed® LSZ-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 LSZ-1 (Patent #6499415) is a portable heavy-duty sewing machine that performs both straight and zigzag stitches. 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. The Ultrafeed LSZ-1 can handle all sails for most 35-foot boats. For larger boats, it will depend on the weight of the sailcloth and the size of the sail. 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:

  • Sailcloth
  • Heavy canvas
  • Vinyl fabric
  • Clear vinyl window material
  • Upholstery fabric
  • Denim
  • Soft to medium leather
  • Lightweight home/hobby fabrics
  • 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.
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 waited a long time to purchase this machine, but should have done this years ago. Many projects I passed on could have been accomplished easily with the LSZ-1 and the great support of Sailrite. Don’t make the mistake of hesitation. If you are thinking about purchasing a machine, you already need this one." – Mike K.

"I sew bike bags so I am using technical fabric mostly, very slick and laminated. The walking foot is the best of its kind. And all the webbing and heavy duty zippers I use don’t stand a chance, especially with the hefty fly wheel. If you are thinking, “will this work for my application even if I don’t sail?”, then throw that thought out. I was blown away by the results I’ve gotten. ... Thank you Sailrite team, for being the epitome of customer service." – Garrett

"Haven’t sewn a stitch since 1988 and watched videos and started sewing my sling chair replacements. No problems at all. Love my machine and am looking forward to more projects. Your videos are amazing and the book is very detailed. I’m very happy I purchased the LSZ-1 package, as the extras are so simple but so effective. I love that magnetic guide! The LED light is bright and can be put wherever I need it. The case is very rugged and fit and finish is perfect. The machine just makes it effortless for a novice like me to sew beautiful stitches." – Tom R.

"The LSZ-1 is a significant investment, my only advice is to make it earlier and get working on those projects. Being able to breeze through 4 or 5 layers of canvas makes a huge difference to the time taken and the quality of the stitch." - Nils S.

"When I bought this portable sewing machine, I was expecting a great machine. ... What I didn't expect were all the great support videos. I have a great appreciation for the way they guide you through tune-up and maintenance procedures. After your purchase you aren't left to fend for yourself. Even if the machine never goes out of tune, I am confident with the knowledge that Sailrite has shared with me. Thank you." - Gerald B.

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
  • Posi-Pin® Safety Shear - 4 sacrificial pins
  • 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
  • Cording Foot Set (for large welting) - designed to sew welting cord and piping up to 3/16 inch
  • 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 LSZ-1
Sewing Speed: 304 stitches/minute (with Monster II Balance Wheel), 638 stitches/minute (with WorkerB Balance Wheel)
Straight Stitch Length: Max. 6mm
Zigzag Stitch Width: Min./Max. 0–5mm
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: 62 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.


5 Reasons You Need an Ultrafeed

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

Ultrafeed® LSZ-1 Sewing Demo

PREMIUM machine shown without WorkerB Power Pack.

WorkerB® Power Pack Slow Speed Control Demo

Introducing the Ultrafeed® Walking Foot Sewing Machine

PREMIUM machine shown without WorkerB Power Pack.


Overall Rating : 4.9 236 Reviews

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Jon I
Verified Purchase

The best!

George Henry
Verified Purchase

All the power and extra’s that anyone could need!

Laurie DeBlase
Verified Purchase

Very well built

Haven't had a chance to use it a lot yet but think it is going to be really great.

Michael Gunter
Verified Purchase

I have been looking at the Sailrite machines and youtube videos for the past three or four years. The canvas on my 1977 Islander32 sailboat is beginning to show its age. Last season, much of the thread securing the sacrificial cover to the roller furling genoa gave way. After a tedious attempt at hand sewing the cover back on, I decided it was time for a new Sailrite machine. The Ultrafeed LSZ-1 Premium machine made short work of the repair. The machine is a solid workhorse and I hope to put it to use making a winter cover and replacing my old dodger and bimini. Thank you.

Verified Purchase

It has power to handle tough jobs. Well thought out heavy duty design. Support is real, not someone on the phone that you can’t understand or understand your issues. USA

Verified Purchase

I love my machine. It does just as advertise. I can now take on any job.

William Reynolds
Verified Purchase

I started sewing my own cloths when I was 17 so I knew the basics of a sewing machine. The Sailrite is a hundred times better than my mother's home machine. I have repaired all the broken stitches in my dodger and Bimini and made an awning for my main cabin hatch. I'm making plans to replace my dodger windscreen and eventually replacing all the enclosure panels. The Sailrite has given me a new way to spend the days when the wind is uncooperative and I can't sail.

Beverly Coggin
Verified Purchase

I'm bummed it to me so long to buy a sailrite.

I have only had my sailrite for a week and I love it. I'm still watching videos on how to operate it properly and working along with the videos. I have been sewing since 1976 when I started in 4-H and I wish I would have purchased a sailrite many years ago. It is so smooth to operate.

Jason Cave
Verified Purchase

Sailrite is that absolute best company. Incredible customer service!!! And my LSZ-1 is amazing! I love this machine. Thanks again to all the Sailrite team, and keep up the amazing Customer Service, you really stand out as a top company to deal with.

James Holt
Verified Purchase

Enjoying the machine and all of your learning videos.

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