I have a Jet contractor saw that recently started vibrating. I can see the belt bouncing when the saw is running. I had never replaced the belt after about 4 years of moderate use. I thought the belt was bad because it was worn enough that it was sitting low in the pulleys and everything appeared lined up well. Replaced the belt with the correct sized green belt, for mowers and the like, but no improvement.
It was then I notice that the motor mount bracket *may* be bent. It is a stamped steel bracket that hangs on the bottom of a cast iron mount. Just past the mounting pin the steel bracket has a slight bend to it, about 5 degrees. I don't recall if this bracket is supposed to be bent or the weight of the motor has bent it.
Is the steel bracket that the motor bolts to supposed to be bent slightly or should it be straight? The bracket that I am talking about is #113 on page 18 of this manual:
Are the link style belts that much better than a standard belt? (the belt I just bought was $12)