Blendtec blenders are known for their power and durability. However, like any frequently used appliance, they can eventually develop problems. One common issue owners report is a grinding or rattling noise coming from the jar bearing. This usually indicates wear and tear over time. Fortunately, there are some troubleshooting steps you can take to resolve jar bearing problems before they worsen.
The main culprit behind noisy jar bearings is a lack of lubrication. Blendtec jars contain stainless steel bearings on the bottom that allow the jar to spin smoothly on the motor base. Over time, these bearings lose their lubrication, causing friction and noise when blending.
Other factors that can contribute to premature jar bearing wear include:
Continuing to blend with a damaged bearing can lead to further deterioration. Eventually, the bearing may wear out completely, requiring jar replacement.
If you start to notice grinding or rattling coming from the jar bottom, try these troubleshooting tips:
Remove the jar and inspect the bottom, looking for any debris or damage around the bearings. Carefully clean the bearings with a soft cloth. Sometimes small particles can get lodged and cause noise.
Apply a few small drops of sewing machine oil or mineral oil directly onto the bearings. Never use cooking oils, as they can go rancid. The lubricant will help the bearings spin smoothly again.
Place 1-2 cups of uncooked rice in the jar along with some water. Run a blend cycle. The rice will gently buff the bearings and redistribute lubrication.
Be mindful not to exceed the jar’s max capacity when blending. Overloading places excessive stress on the bearings. Stick to recommended ingredient amounts.
Always make sure the jar is seated firmly and securely on the base before blending. Improper jar installation can damage the coupling that connects the jar to the motor.
For severely worn bearings making loud scraping noises, replacement of the entire bearing assembly at the jar bottom may be needed. This requires disassembling the jar and should be done by an authorized service center.
If bearing damage is extreme and other fixes don’t work, a new jar will be required. With heavy use over many years, jar replacement may eventually be necessary.
Following proper care and maintenance practices will maximize your blender jar’s lifespan:
With proper use and care, Blendtec jars and bearings can deliver years of smooth performance. But at the first sign of grinding noises, be sure to troubleshoot and lubricate the bearings before long-term damage develops.
Loud grinding or rattling noises from the jar are usually caused by lack of lubrication in the stainless steel bearings. Friction and deterioration of the bearings over time can lead to noise issues.
Apply a small amount of mineral oil, sewing machine oil or other light lubricating oil directly onto the bearings. Never use cooking oils as they can turn rancid. Let the lubricant soak in, then blend some rice to further distribute it.
If lubricating the bearings doesn’t resolve the noises, the jar may need replacement. If bearings are severely worn, replacement of the entire bearing assembly may be required by an authorized service center. With heavy long-term use, jar replacement is sometimes necessary.
