SINGER 321D Ultra High Speed Complete Industrial Commercial-Grade 3 & 4 Thread Serger Overlock


(as of 08/13/2016 at 10:10 UTC)

SKU: B009L7FX6Y Category:

Product Description
The configuration includes the SINGER sewing machine head, motor, and single pedal stand that comes completely assembled. The extra-high sewing speed sews five times faster than a conventional domestic serger allowing you to complete projects quickly. The heavy duty motor allows you to sew multiple layers of fabric easily. Dual pedal stand allows for hands-free raising and lowering of the presser foot. The versatile design appeals to a range 3 and 4 thread serging applications. The differential feed ensures wave-free seams in knits and prevents puckering in fine fabrics. Included Accessories: All-Purpose Foot (on machine), Needles (3), Oil Bottles, Oil Funnel, Oil Filter, Wrenches (3), Screwdrivers (9), Lower Knife Blade / Stationary Knife Blade, Tweezers, Foot Controller Chain, Soft-Sided Dust Cover

singer is sewing made easy

Completely Assembled

Completely Assembled

Thee SINGER® 321D-241M-24 Complete is delivered completely assembled. The complete setup is assembled in the SINGER industrial assembly center in Tennessee and includes the SINGER exclusive designed machine head, SINGER dual pedal stand, SINGER motor and thread holder.

Automatic Self Lubrication System

Fully Automatic Self-Lubrication System

The serger has a built-in oil compartment and self-lubricates while the machine is in use. Oil is circulated by a centrifugal pump from the oil reservoir to the machine base, allowing for efficient high-speed serging.

Clean Chute

Clean Chute

The table includes a clean chute fabric slide that keeps your sewing area tidy.

Wide Open Threading

Wide Open Threading

The front of the serger opens completely to reveal the loopers, making threading effortless. The color coded threading system leaves you worry-free.

Differential Feed

Differential Feed

Differential feed ensures wave-free seams in knits and prevents puckering in fine fabrics. It can also be used to create deliberate gathering. The differential feed ranges from 2.0mm to 0.7mm.

Hands Free Presser Foot Lifter

Hands-Free Presser Foot Lifter

The right pedal of the dual pedal stand allows for hands-free raising and lowering of the presser foot. The high presser foot lifter allows for 5.0 mm (0.2 in) of lift.

Additional Features & Benefits

Versatile Design for Range of Applications

This machine is perfect for tailors, seamstresses, home decorators, designers, industrial sewers and high volume domestic sewers.

Large Sewing Space

The large sewing space allows you to easily manage bulky projects. The arm of the machine extends longer than a conventional sewing machine so overcrowding is not an issue. The tabletop measures 50" in length by 22.5" in width.

Sturdy H-Leg Stand

The stand’s H legs provide a safe, stable and immobile sewing space when sewing at high speeds. The stand also features adjustable height and a tan laminate top for durability.

3-4 Thread Capability

The different stitch types ensure the perfect stitch, regardless of the project: Three-Thread Overlock, Three-Thread Wrapped Edge Overlock, Three-Thread Flatlock, Four-Thread Stretch Mock Safety Stitch.

Adjustable Stitch Length

Keep your seams strong and prevent bunching on any fabric type. The push button stitch length adjustment makes it easy to customize your projects. Choose from various stitch lengths with a maximum of 3.8 mm (0.15 in).

Adjustable Presser Foot Pressure

The amount of pressure exerted on the fabric by the presser foot is adjustable. Sew from the lightest tricots to the heaviest denim with only the turn of a dial.

Adjustable Tension

Use the tension dials to adjust the thread tension effortlessly when sewing on different fabric types.

Moveable Needle Guard

Prevents skipped stitches and reduces needle wear.


This industrial sewing machine will arrive on a wooden crate. It will then be your responsibility to transport it to its final location. The complete set-up weighs 211 pounds and will require heavy lifting by multiple people.

Machines includes a container of Singer industrial grade oil that must be fully emptied into the machine's oil pan before using the equipment; failure to do so or running the machine without oil can cause damage to the internal working parts.

Heavy-Duty Motor

Motor Power
The machine’s industrial grade motor provides high speeds, extra power (up to 1/2 horsepower), is constructed for decades of extended use and is designed for high speed sewing on multiple fabric layers.

Ultra High Variable Sewing Speed

Motor Power
The ultra high sewing speed provides professional sewing capabilities. Sewing at 7,500 stitches per minute allows this machine to complete projects over five times faster than a conventional serger. The needle and needle thread cooler make high speed operation worry-free.

The Right Stitch: Easier Sewing With Better Results.

Three-Thread Overlock Stitch
Three-Thread Overlock Stitch
Provides a wonderful professional seam finish, helps prevent loosely woven fabrics from unraveling, and offers unlimited decorative capabilities.
Three-Thread Flatlock
Three-Thread Flatlock
Special decorative threads can be used to add texture and a dramatic embellishment effects.
Three-Thread Wrapped Edge Overlock
Three-Thread Wrapped Edge Overlock
Ideal for finishing fine fabrics or highly stretchable fabrics.
Four Thread Mock Stretch Stitch
Four Thread Mock Stretch Stitch
A favorite when sewing a knit fabric because the stitch stretches as the fabric stretches providing a strong and professional finish that will not “pop” when the fabric is stretched.

Included Accessories (accessories are located in the accessory storage drawer, under the left side of the table):

  • All-Purpose Foot (on machine)
  • Needles (3)
  • Oil Bottles
  • Oil Funnel
  • Oil Filter
  • Wrenches (3)
  • Screwdrivers (10)
  • Lower Knife Blade / Stationary Knife Blade
  • Tweezers
  • Foot Controller Chain
  • Soft-Sided Dust Cover

321D Accessories

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More people own SINGER machines than all other brands combined.

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SINGER is sewing made easy.

Founded in 1851, Singer is one of the world’s leading sellers of consumer and artisan sewing machines, and one of the world’s most trusted and recognizable brands. The company has a long history of innovation, having produced, among other breakthroughs, the world’s first portable machine, the first zigzag machine and the first computer-controlled machine.

By making simple, easy-to-use machines, Singer has provided the gateway to sewing for people around the world. From home décor and clothing construction to embroidery and quilting, Singer is dedicated to helping people express themselves through sewing.


  • The configuration includes the SINGER serger head, motor, and dual pedal stand that comes completely assembled
  • 3-4 Thread Capability ensures the perfect stitch
  • The Extra-High Sewing Speed sews five times faster than a conventional domestic serger allowing you to complete projects quickly at 7,500 stitches per minute
  • The Heavy Duty Motor allows you to power through multiple layers of fabric easily
  • Dual Pedal Stand allows for hands-free raising and lowering of the presser foot

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