Upper Looper for Husqvarna Viking / Pfaff Overlock (Ref. 68019566)

The upper looper is one of the most important mechanical parts in the formation of an overlock stitch. Working in a synchronised "dance" with the needle and the lower looper, this arm guides the thread over the edge of the fabric to create the characteristic intertwined finish of the seam.
When the operator inadvertently pulls the fabric or an excessively thick fabric blocks the feed, the needle deflects and can hit the tip of the looper. A looper with a scratched, bent, or broken tip will cause constant thread breakage, skipped stitches or, ultimately, prevent the machine from sewing altogether.

(Original and equivalent references: 68019566)