How to Flatlock Stitch With a Serger

Written by kristy robinson Google
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How to Flatlock Stitch With a Serger
Use decorative threads to make a unique flatlock design on your project. (Comstock/Comstock/Getty Images)

The serger flatlock stitch is a decorative stitch that is made using two or three threads instead of four. Once completed, the stitch is decorative on the wrong and right sides, giving two options for use. Decorative threads are used to achieve dramatic or textured embellished looks when making the stitch. Using the flatlock stitch also enables flatter seams when sewing bulky fabrics such as fleece or fur.

Skill level:
Moderately Easy

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  1. 1

    Set up the machine for flatlocking. This typically involves removing one or more needles. Flatlocking with three threads requires use of one needle and the upper and lower loopers.

  2. 2

    Loosen the needle thread tension to your serger's recommended instructions for flatlocking. For example, Singer auto tension machines require the dial to be set to "F." If you have multiple tension wheels, set them to a low setting such as "2" and possibly lower for bulky fabrics.

  3. 3

    Set the lower looper tension tighter, approximately "7" on the tension wheel. This will need to be slightly lower for bulky fabrics. This thread will form a straight line along the edge of the folded fabric when set properly. Once set, test the stitch on a scrap piece of the fabric to check for correct tension.

  4. 4

    Fold the fabric with right sides together if you want the ladder stitch to show on the finished project. Fold the fabric with wrong sides together if you want the flatlock stitch to show on the outside of your finished project.

  5. 5

    Align the edge of the project under the serger needle so that half of the stitches will be hanging over the edge of the fabric. Allow more of the stitch to hang over for bulky fabrics.

  6. 6

    Stitch along the seam. Open the fabric and pull gently until flattened. On one side of the fabric there will be a ladder stitch and on the other side the flatlock stitch will appear.

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