Treadmill Bearing Failure – Symptoms, Causes and Replacement Guide
A loud grinding noise from your treadmill? It's likely bearing failure. Learn the symptoms, causes, and steps for replacement in our comprehensive guide.
What are Bearings and Why Do They Fail?
Bearings are small sets of steel balls that allow the rollers and motor to spin smoothly. They fail due to age, lack of use (grease drying up), moisture, and stress from overtightened belts.
Symptoms of Bad Bearings
The tell-tale sign is a loud, deep grinding or rumbling noise that gets progressively worse and louder as you increase the speed. The machine may also vibrate excessively.
Identifying Which Bearings are Bad
A technician can isolate the noise by running the motor with the drive belt removed to check motor bearings, and by spinning the rollers by hand to feel for roughness.
The Replacement Process
Bearing replacement is an advanced repair. It involves removing the roller or motor, using a press or puller to extract the old bearings, and pressing in new ones. This should be done by a professional.