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It could be a couple of things. If you have a dial indicator you could check your blade for warpage or your arbor. There could also be an issue with your belt/pulley, that is, if it is belt driven
 

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where's my table saw?
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29,969 Posts
Start without the belt...

Assuming it's a belt drive saw? Remove the belt and see if it still vibrates. If so, it's possible the motor is not tight in the mount. The is the pulley is loose on the shaft? Finally, with the belt back on see if the saw blade wobbles as it shuts down. If so, remove it clean all the mating surfaces and remount it.
If it still vibrates, you may need a new belt. The tool and machine belts are not the same section as automotive V belts, so get the correct one from a tool or hardware store.

If all this fails to eliminate the vibration, you may have some bad arbor bearings or the bearings are about to fail.... :blink:

Edit no 3 http://www.vbeltsupply.com/ecommerce/fractional-wrapped-belts/4l
 

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Sawdust Creator
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8,046 Posts
9 times out of 10 it's a belt issue. Even if it's not, it's likely your saw could use a new one. I'd start there and I'd recommend a harbor freight link belt.
 
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