Home Beginner's Guide to Serging How to Change Serger Knives

How to Change Serger Knives

written by Sarah


Are you ready to show your serger some TLC? In this video, we teach you how to change the upper knife and lower knife of your Serger.

Sergers, also known as Overlockers, are loved for their ability to quickly trim raw ends. Unlike sewing machines, sergers have two built-in “knives”. These razor-sharp blades are strong enough to cut through thick denim, yet gentle enough to shave fine chiffon. However, they’ll eventually become dull. If you see the fabric edges fraying slightly, despite being freshly serged, it’s time to change the knives.

Generally, if you serge everyday, expect to replace your knives every 2 to 3 months. Again, this is a judgement call. Keep in mind, stock blades are likely made of steel and thus not the highest quality. Our technicians prefer serger knives made of Carbide, as they last longer and preform better.

Serger knives are machine specific, so make sure to search our website by model number or give our customer service a call. We’re happy to help!

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4 comments

Sheila Fuhrmann January 24, 2019 at 7:23 am

I have a Brother 3034D that I bought in ’09.. It is time to change the blades. Which blades do I need? Thank you for your help

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CustomerService January 24, 2019 at 2:09 pm Reply
Kathi Cooper November 19, 2017 at 1:10 pm

Where can i get replacement blades for the overlock with side arm attachement for a Brother sewing machine. Low profile

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Sarah November 20, 2017 at 1:04 pm

Hi! What is the model number of your overlocker?

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