I don't have one, but inspect the shaft, it looks like there is a key on the shaft, then inspect the inside of the blade where it goes on top of the shaft, see if it looks like the shaft has spun out the blade and this is why it's not spinning.
Remove the blade and the container, then turn on and see if the shaft is spinning, it should be most are a direct drive.
So now if the shaft is spinning, that most likely means that the blade hole is broke where it sets on top of the shaft.
Look closely at the inside of the blade, you should see some type of damage like the groves are worn, I hate to see you buy one and it was the shaft that wore, but usually the blade will go first.
SOURCE: Blade won't spin
Check the blade with it off the base and make sure that it spins freely. Check the spindle on the base and see if it feels hard to turn. If the spindle turns too easy , then the connection inside the base is broken and needs replacing.
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SOURCE: my blender seems to spin without the glass blender
your blade assembly is corroded. take it off, and using a rag, grab the blades. using another rag, grab the other end (probably rubber) and turn CLOCKWISE - it's threaded reverse, so you have to turn to the right to loosen, not the left like usual. I had to clean out the rod that connects to the blades - it was all nasty and corroded. I cleaned it with my Dremel and regreased with a tube of grease I keep in the garage, cleaned all other parts with some Dawn, dried well, reassembled, and works almost like new. I'm guessing I ran it too long without pulsing the motor and the heat corroded the rod that's connected to the blades. OR you can buy a replacement blade unit for about $10 online on a blender parts site
SOURCE: Blades won't turn
If the problem is that the blades are jammed and you can't turn them manually, you can let it sit ( and dry out ) for a few days, or you can try adding some oil. I had the same problem and this worked. My problem now is that the blades don't reach to where the motor is turning, so even if they're not jammed the don't turn. If anyone knows and answer to this I'd appreciate it.
SOURCE: connection between the motor and the blender unit
Replace the blade assembly immediately. They are available from Cuisinart's website. Sugars and other stuff can gum up the blade assembly over time, so it will periodically need to be replaced. A quick and easy way to keep the blade assembly clean and working longer is to put water and a drop of dishwashing soap in the blender after use and run the blender at low speed for 15-20 seconds - an old Osterizer trick.
SOURCE: My blendtec blender doesn't blend
You have already found what is the problem the blades.
The blades after a lot of working hours with ice they have mainly three problems.
One the sharp adjes have created a lot of teeths and are not so sharp any more so the blending is not smooth anymore.
Second problem they have loose a title so they have move from corect place some milimeters and this change the wave motion and again the beleding is not so smooth as before.
Third the blades are secure on an axis which is located in two bearings which have een wearing out so the rotating motion of the blades again is not so smooth as before.
So if you are not able to fix the blades kit or to find someone in your area to do it profetionaly and cheap one good idea is to buy a new blades kid.
Good luck
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Ninja blender cup not working
Ninja Professional NJ660 blades rotate in the full size blender but do not rotate in the single serve. Have used it several times then all of sudden it stopped working???
Should the gears in the lid of a Ninja blender be spinning w/ the shaft? Ours isn't and seems broken after months of great work. Can it be fixed or does it need to be replaced?
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