Suitable for fine to medium weight fabrics - pleats/gathers will be less pronounced the thicker the fabric.
Ruffler #86 is a specialist in the simple gathering and pleating of fabrics. Thanks to its variable setting options, both pleat depth and frequency of gather can be varied.
 This means that Ruffler #86 can set a pleat with every stitch, every 6th stitch, or every 12th stitch, as you choose. There’s also the option of sewing without pleating, without replacing the presser foot (ruffler setting = 0).
Gathering is performed by the special gathering blade, which causes the up-and-down motion of the needle to catch a bit of fabric each time and slip it under the needle.

The result: neat, even gathering and pleats on home furnishings or garments.  The depth of the pleat can be infinitely varied by turning the adjusting screw.