Bosch table saw 4000 reverse threaded blade nut?

SOURCE: How to change blade on 10" Craftsman table saw?

you need to grab the blade with something.maybe some pliers(if you are not going to refurbish blade) and loosen the nut in the center of the blade. i think it is a left hand thread(cw to loosen) because of the rotation of the blade. if the nut is on the left when looking from the front it is probably left handed. make sure it's unplugged and wear leather gloves so you don't get cut. install in reverse...

SOURCE: blade does not turn

Disconnect the electric from the saw. Remove the throat blade cover. Bring the blade all the way up. Look for wood  caught between the blade and anything else. Finding none,remove blade. Try motor w/o blade. If it runs now,w/o the blade then the motor is likely ok . Reinstall blade. Now if it stil stalls, Replace motor.

SOURCE: no book.how to square craftsman table saw mod 137 blade to table

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SOURCE: key switch on Craftsman table saw

Switch is filled with sawdust. Disassemble and clean out.

SOURCE: Have an older Sears Craftsman 10" Table Saw, model

you should be able to order one from sears. another place to look is ebay. the round plastic thing is to mark with pencil the cut of the blade. put in your sliding miter Gage set at 90 deg. put a piece of wood on it, push forward and cut the wood then slide back and mark the wood position on the plastic. that's the point where your blade cuts

Testimonial: "Thank you very much, I'll try Sears first and see if they can help. Since it's an older saw, they haven't been much help up to now."