Instructables

How to Fix a KitchenAid Mixer That Isn't Spinning

Picture of How to Fix a KitchenAid Mixer That Isn't Spinning
KitchenAid stand mixers usually stop spinning because of a failed worm gear, and this article explains how to fix the problem at home.

If your KitchenAid stand mixer has stopped spinning, chances are that it doesn't have to mean the end of your mixer's service life.

To add to the good news, many KitchenAid mixer repairs can also be done right at home with simple tools, saving you money at the repair shop.

KitchenAid stand mixers are designed to survive a number of normal breakdowns and parts replacements. Some parts, like one of the gears that spins the mixer, are even designed to wear over time and/or fail under stress.

This articles explains how to replace the worm gear in a KitchenAid mixer, the part that most commonly causes a mixer to stop spinning in many stand mixer models.

Anyone can take household repair matters into their own hands with this professional repair information and eReplacementParts.com's online inventory of O.E.M. KitchenAid parts.

 
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Step 1: KitchenAid Mixer Worm Gears

Picture of KitchenAid Mixer Worm Gears
Just to clarify, the KitchenAid mixer part that spins is called a planetary. This is the part of the mixer on the underside of the motor housing where KitchenAid accessories attach.

KitchenAid Mixer Planetary Assembly

The mixer's gearbox is positioned just above the planetary in the front end of the motor housing. Several gears inside the gearbox work together to spin the planetary.

For this style of KitchenAid mixer, one of the gears is specifically designed to fail before the others--a gear called the worm gear.

KitchenAid mixer worm gears are made to absorb stress and friction during operation. They can either wear slowly over time so that metal gears do not wear, or they can completely fail when the mixer is overloaded, as a safety mechanism. 

In this mixer style, the worm gear is made of a hard nylon material that is less hard than the other metal gears in the gearbox. This difference in hardness ensures that the worm gear breaks before the metal gears tear each other to pieces.

Because KitchenAid mixers are made to last many years (even decades) you should expect to replace the worm gear in this style of mixer sometime during its service life.

IrshaadA27 days ago

I have recently replaced my worm gear and my center gear is fine but my kitchen aid mixer still isn't working.What do I do?

RobertH63 months ago

I have Model KG25H3XWH 5 qt. stand mixer that I think needs a worm gear. Any step by step instructions for that dismantle?

RobertH63 months ago

I have Model KG25H3XWH 5 qt. stand mixer that I think needs a worm gear. Any step by step instructions for that dismantle?

canida1 year ago
Thanks, just used your instructions on the stand mixer here at Instructables HQ!