25% off your first order of $40 or more Use code WELCOME25 at checkout, as a guest or with a free account. Not valid on MAP-priced items, tables and extensions, machines or heavy items.

Continue with Google Use my email Get 25% off
New Jersey business, US distribution warehouse Free US shipping on orders of $50 or more (888) 639-9878

Cart

Welcome

Continue with Google New here? Create an account

Serger knives

Upper and lower knives for sergers and overlockers, listed by the serger models each one fits. The upper knife is the moving blade and the one that wears first; the lower knife is the fixed anvil it cuts against. When the cut edge goes ragged, the fabric chews or pushes instead of slicing, or threads fray before the loopers catch them, the upper knife is due — usually after a year or two of regular use, sooner on polyester fleece and knits. Many listings offer a carbide (tungsten) upper knife that stays sharp several times longer than steel.

Products

Filter parts

Clear all
Machine brand
Part type
Product brand
Price

92 products

Knives are sold singly, upper or lower; the position is in the product name. The guide explains how to tell which one has worn and how to change it without disturbing the loopers.

Frequently asked questions

Upper or lower — which knife do I replace?

Check both knives for wear, damage and alignment. The moving upper knife may need replacement, but inspect the lower knife as well before ordering.

Are carbide knives worth it?

If you serge often or cut synthetics, yes — a carbide upper knife holds its edge several times longer than steel for a modest premium.