Heat: A build-up of sap on the blades, dullness, very high feed rates and free-handing can cause the blade to overheat, which will make it warp and catch.

Pinch and twist: As the wood relieves stress and moves it can pinch the blade.

Attempting to free hand cut on the table saw: NEVER free hand cut on the table saw, thats what the bandsaw is for.

Wet wood will put a great deal of friction on the blade.

Boards that are too short to be properly stabilized by the guides.

Warped or twisted wood or any board that does not have at least 2 flat sides. Any board that isn’t straight or is rough cut must be put through the planar and jointer prior to being processed with the table saw.

Fatigue and ignorance are the two main causes of accidents in the shop. Add complacency to this list and you will probably have covered 99% of the causes of bad things in any type of shop.