
BERNINA L 660: Fast, Precise Overlocking
The L 660 is the air-threading overlocker in the BERNINA L series, built for fast and clean finishing. Reserve one with a $500 fully refundable deposit and pick it up at your Quality Sewing store when it arrives. (This machine is only available for in-store pickup.)
Professional Overlocking
The BERNINA L 660 creates clean, professional seams, rolled hems, and flatlock using 2, 3, or 4 threads, with 18 stitch patterns at up to 1,200 stitches per minute. A powerful, quiet DC motor delivers consistent piercing power on any fabric.

Effortless Air Threading
- One-Step BERNINA Air Threader for the loopers
- Color-coded one-path threading
- Same threading paths for every stitch
Hold the threads over the air threader, press the foot control, and the threads are drawn in by air. With the needle stop up, the loopers move to the correct position automatically, no handwheel turning required.
Differential Feed and Micro Thread Control
- Stepless differential feed, 0.7 to 2
- mtc Micro Thread Control
- Smooth, pucker-free seams
Stepless differential feed keeps delicate and stretchy fabrics smooth and free from puckering, while Micro Thread Control fine-tunes the looper thread for perfectly balanced stitches, even while you sew.

BERNINA Free Hand System
- Knee lifter raises the presser foot
- Drops the feed dog at the same time
- Both hands stay free to guide the fabric
The built-in Free Hand System lets you raise the presser foot and drop the feed dog with a knee lifter, giving you more clearance and full control when positioning even the thickest fabrics.
Programmable Needle Stop
- Needle stop up or down
- Stitch-by-stitch sewing
- Back-kick foot control
Program the needle to stop up or down, and use the back-kick on the BERNINA foot control to raise or lower the needle by half a stitch for precise starts and stops.

Fast and Precise
Adjustable stitch length and cutting width from 3 to 9 mm, an integrated upper looper converter, and a knife you can deactivate from the outside make the L 660 ready for any seam. A slide-on table is included for larger projects.
Key Features
Specifications
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Frequently Asked Questions
Is the BERNINA L 660 a serger or a coverstitch machine?
The BERNINA L 660 is an overlocker (serger) only, not a coverstitch machine. It sews 18 stitch patterns using 2, 3, or 4 threads at up to 1,200 stitches per minute. For coverstitch, see the BERNINA L 620. Browse more sergers.
How does threading work on the L 660?
The L 660 has a One-Step BERNINA Air Threader that threads the loopers at the push of a button, plus color-coded one-path threading and a built-in needle threader. The threading paths are the same for every stitch.
What is included with the L 660?
It comes with the Overlock Foot with tape guide L11, a slide-on table, the looper cover with built-in cut-offs bin, a BERNINA foot control, knee lifter, ELX705 CF needles, and the standard tool kit.
When is the L 660 available and how do I order?
The L 660 is expected late August. You can reserve one now with a $500 fully refundable deposit on this page, then pay the balance when it arrives. Machine sales are limited by dealer agreements, so check your ZIP code on this page first. Pick up is in store.
What can the L 660 sew and what warranty applies?
It handles overlock seams, rolled hems, and flatlock on stretch and woven fabrics, with stepless differential feed and a 3 to 9 mm stitch width. It is covered by the BERNINA Limited Warranty plus a 1-Year Quality Sewing in-store service warranty. See the specifications tab for the current warranty terms.
How does the pre-order deposit work?
The $500 deposit is fully refundable and reserves a machine from the incoming shipment. It goes toward the balance when the machine arrives and you pay the rest at pickup. Machine sales are limited by dealer agreements, so check your ZIP code on this page first, and note that this machine is available for in-store pick up only. Browse the rest of the range in BERNINA Sergers.
