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Anatomy of a Blender, Part 6


Let’s dive once again into the inner workings of Blendtec blenders. This time, we’re going to look at In which we examine a true masterpiece of engineering.

Feature #10: Steel-on-Steel Power

In a Blendtec blender, the power is transferred directly from the motor to the blade. All the intervening parts are steel and machined for a precision fit. This steel-on-steel approach results in lower vibration, reduced noise, and increased reliability.

Blendtec motor drivetrain

Blendtec’s steel-on-steel power train is more reliable, lasts longer, and can transfer greater loads to the blade.

In nearly all other blenders, the power goes from the motor through a breakable plastic coupling. The coupling is designed to break if the motor overloads, in order to protect the motor. Unfortunately, this design also limits blending power and decreases the life of the coupling.

Typical blender power train

A typical blender motor includes a plastic breakable coupling, which limits power transfer from the motor and reduces jar life.

A Blendtec blender, on the other hand, automatically detects an overload condition and shuts down, eliminating the need for a breakable plastic coupling.

Have you ever noticed whether your blender has a breakable plastic coupling? If so, now you know why! Share your thoughts in the comments section below.

(17) Comments on “Anatomy of a Blender, Part 6


    My jar is making a bearing noise. Today it stopped and said it was It overheated, and then after cleaning it, I spun the shaft with my fingers I heard a worn bearing noise I use it everyday to make juice. Can I fix it or grease it somehow??
    Rob Zinn

  • Marit Fivelsdal

    Hmmm, my NEW blendtec (only 38 minutes on it) said “overload” this morning when I put on my usual frozen blueberries, yogurt, milk and protein powder (it was on smoothie) . It was quite runny liquid… almost like water. Then I unplugged it, plugged it back in, turned off the back, turned it on on pulse …. and it still went to “overload”… so I emptied it, filled it with water… and it STILL went to overload (on pulse)…. then I put it on soups and sauces and it finally stayed on that cycle (with water) and didn’t go to overload.

    Do I have a “bum” machine???? Should I take it back to Costco?

    Thank you so much, Sincerely, Marit.

  • Brent Peterson

    We have destroyed, at last count, 8 blenders (not Blendtec) in the past 3 years – all due to the failure of the plastic/rubber coupling. The sound of the over-revving motor, the smell of burned plastic and the mess of half-blended ingredients signal the machine’s demise. What can we say? Our kids love smoothies with lots of frozen fruit. Our current blender is on borrowed time but the local retailer has been replacing it so we’ve kept going back. The 1-year warranty is almost up and we know we aren’t going to get another. In researching the replacement I found that a lot of commercial blenders have plastic couplings that are designed to break – one manufacturer even ships a spare coupling with the blender. The idea of an ‘all steel’ powertrain really appeals to us so we’re off to Costco for a Blendtec when our current Ninja finally commits hara-kiri.

    • Brent Peterson

      We just got our Total Blender last week. Wow. Awesome machine, We’re still getting used to it but compared to the now-dead one, it’s smaller, quieter and MUCH more powerful. The Ninja finally failed when a small screw (about 1/8 inch diameter) snapped. This was the fastener that held in place the plastic piece that transferred the power from the motor base to the blending jar. The all-metal drive train on the Total Blender is looking better all the time.

  • Scott

    I noticed the Wildside jar edges sit directly on the base without any form of rubber gasket between them. The jar moves quite a bit, especially when starting up or when crushing ice. I keep my hand on top usually to keep things quiet and more steady, but I am a bit concerned this movement will result in wear on the base or damage to the paint. Would it make sense to add a small rubber gasket or one sided tape on the base under the jar edges to quiet things and preserve the base finish?

    • Blendtec blender jars are designed to have some play while blending so it can work through tougher ingredients, and disallowing the jar to move can cause overheating and wear on the jar and base. When using tough ingredients like frozen fruit and ice, you can stabilize the motor base if necessary. Thank you for the feedback! We are always open to suggestions.

  • mary Lega

    I have Model ES3 purchased from it. I just want to know how to reset the number that shows up on right-hand corner of home screen. How come it is so high 604. I have tried to lower it w/number/arrows but it keeps going up. Is the a set number that should show up on Home screen. Don’t want to damage my machine so was worried that the number goes up. Usually only make smoothies with frozen berries, verbs, etc. oh and cried ice. Am I damaging my blender with this high #? Thanks in advance for info.

    • Hi Mary,
      The number that is displaying on your screen is what we call a cycle count. That number shows how many times you’ve used your blender. 604 is a lot of blends! Glad to know you’re getting such great use out of your Blendtec.

  • JohnHolden

    Nice Blog! We have read a few of the interesting content on your website now, and we really like your style. Thanks a million and please keep up the effective work.

  • James Keirstead

    I have a Bendtec Blender and the jar started smoking. When I examined it I noticed black gasket shavings all over the place. Further inspection showed that drivetrain gasket is failing. Is there a way to replace or repair it?

  • Jeremy


    I have been researching what new blender to get our family as we have destroyed the last few ones. I am very interested in Blendtec, however I am quite put off after researching the amount of gasket/bearing fails in your blade jars.

    I am wondering when Blendtec will be revamping/improving the blender housing of the blade to prevent this from occurring? As well I would need to purchase a “twist jar” to accommodate making nuts, and with only a 3 year warranty on a $150 jar that can leave a consumer a little worried and hesitant to purchase your product.

    Thank you in advance for your reply.

    • Jessica Andreasen

      We are always working on improving our products and our jars have recently been improved with double bearings so they’re stronger than ever! Your jars are a wear item so over time, it will need to be replaced. However, they are covered under warranty so as long as you stay compliant (don’t take it out of the country it was purchased in, don’t use it for commercial use, etc.), you’ll be able to get it replaced should something go wrong. Hope this helps! Feel free to call our customer service team at 1-800-748-5400 with any further questions.

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