Overlock needles and special thread

Overlock Threads
Unfortunately, when overlockers first came on to the market, it was often thought that any old cheap thread would do. However, this is untrue. Threads that are too strong may bend the Loopers of the machine and fine cheap threads may break easily so the inexpensive cones which are sometimes sold as overlocker threads may not be a bargain after all! Buy threads with a gauge of 120 or check the machines manual to make sure they are the correct type a good quality thread with an even twist and no loose fibres will be best for a machine and give a perfect stitch.

Using Decorative threads
Decorative threads or fine ribbons can be used in the upper looper. Check that they will not be too thick or strong first as they may damage the loopers. Turn machine by hand first then stitch slowly.

Needle Type
General sewing machine needles are not always the correct ones to use in an overlocker, indeed damage may be caused by using the incorrect type of needle. Check the manual for details, as it will recommend the best ones for the make and model of overlocker. As with conventional sewing, the choice of needle also depends on the type and weight of fabric, for example, fine needles for thin/lightweight fabrics or stretch needles for knitted/jersey fabrics. Also change needles frequently and ensure both needles are the same type and size when doing four-thread overlocking.