WOW , That's a lot of noise! If your sure it's the motor, then I would think it's beyond repair, and a new motor is called for. You could take it to a local elec. shop and see what they say, but sounds like it is shot to me. :smile:
Have you run the motor without the belt attached? Sans pulley? Sounds like one of the pulleys may have lost its key and is slipping/rattling. If so, square and woodruff keys are available at most hardware stores. It may be sitting at the bottom of a pile of sawdust. Let us know what you find. (Replacement pulleys are easy to find also.) Luck to ya.
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