4-Thread Overlock
A specialized sewing machine that trims, sews, and overcasts edges simultaneously, ideal for knit and woven seam finishing.
Where it is used
Step 3: Stitching front strap
p. 3- Stitch and serge the edges of the continuous front strap at the same time using a 4-thread overlocker.
Sew Shoulder Seams
p. 6- Sew the shoulder seams using a 4-thread overlock machine (or sew with a regular machine first, then finish the edges with a standard 3-thread overlock).
Attach Sleeves
p. 10- Attach and serge the sleeves to the armholes in one step using a 4-thread overlock machine (alternatively, sew with a standard machine, then finish the edges with a regular 3-thread overlock).
