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High Speed 3-4 Thread Industrial Overlock Serger

The extra-high sewing speed of the 321D-241M-24 Industrial Serger 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.

Get started sewing faster.
  • Completely Assembled
  • The SINGER® 321D-241M-24 Complete is delivered completely assembled. The complete setup is assembled in the SINGER industrial assembly center in LaVergne, TN and includes the SINGER exclusive designed machine head, SINGER dual pedal stand, SINGER motor and thread holder.
  • 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
  • The table includes a clean chute fabric slide that keeps your sewing area tidy.
  • 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 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
  • 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. 
  • 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.
  • 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 (9), Lower Knife Blade / Stationary Knife Blade, Tweezers, Foot Controller Chain, Soft-Sided Dust Cover
  • 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
  • Special decorative threads can be used to add texture and a dramatic embellishment effects.
  • Three-Thread Wrapped Edge Overlock
  • Ideal for finishing fine fabrics or highly stretchable fabrics.
  • 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.
  • Please Note: 
  • 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.


Get started sewing faster.
Download the instruction manual for this machine.
Download the product sheet for a printable list of all of the features and accessories
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What others are saying.
Travis Roberson | October 20, 2013
Overall Rating
Good Value, Great Features, Easy To Use, High Quality

Nice machine, love it!!!!

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