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Arbor pully and motor pully kepts working loose no mater how much i tighten set screws

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You might want to check the inner bore on the pulleys and the arbor shafts for wear. The pulleys should be somewhat of a snug fit. Then if they are OK I would replace the set screws and when reinstalling use some looctite/thread sealer to keep them from loosening. (BLUE) should work well for this.

Posted on Apr 01, 2011

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1 Answer

Loose pulley arbor


I had a similar problem and after removing the suspect pulley I discovered that the threads for the set screw were not tapped all the way through. The set screw would tighten but not go far enough to lock on the key. With the pulley off the arbor I forced the set screw until it threaded well into the key way. I had to use quite a bit of force to get it to go but it finally pushed through the last portion that was unthreaded. Then I reinstalled it on the arbor with the key and tightened it. It has been months now of steady use without any movement.

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1 Answer

Motor runs but the blade spins slow with no torque (maybe something is loose)


Check your saw arbor nut, lift the plate that surrounds the blade, usually 2 philips head screws....put some WD 40 on first. You will see the arbor nut on the main spindle holding the blade. You should have a wrench that came with the saw to tighten the nut. Tighten it firmly, replace the plate. The blade should now cut. Needless to say your disconnect the power cord before you start.

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1 Answer

I have a powermatic 66 table saw. I removed the motor, to move the saw. when i reinstalled the motor, the blade has moved 5/16'' towards the fence.


Check to make sure the arbor set screw is not loose. The bearings may have shifted when you moved it. I recently rebuilt an old 66. Repositioning the bearings and tightening the set screw could be all it needs.

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1 Answer

I was recently given and older Craftsman 10" table sawa. It worked great for cuttin some 2x4 and now all of a sudden it will only cut part way7 and than stops, and it smokes--Help!!


The problem could be one of the following:
1) dull blade, in which case replace with a carbide-toothed blade
2) underpowered or old/faulty electric motor
3) faulty/worn belt, in which case replace with new belt
4) The pulley on either the motor or the saw arbor (where the pulley attaches underneath the saw near blade) could be loose. Tighten down set screw.
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1 Answer

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It could be a number of issues. These saws have a built in vari-torque clutch used to prevent kickbacks. Basically, when the blade binds while cutting, the arbor spins but the blade won't (prevents kick-back). It works by not over tightening the blade washer (this is the slip clutch), if you over tighten, the blade washer can't prevent kick-backs because it has no room to slip, if you under tighten, the arbor spins, but the blade won't. I'd try to tighten the blade washer 1/8 turn and see what that does. If your actual arbor shaft is not spinning, you could have a gear issue. If you hear the motor running and the arbor slips (not the slip clutch) sounds like there might be a gear issue,If the rotor is spinning (the part inside the stator-i.e. the electric motor section) but it is not transfering that movement to the arbor, it has to be a gear issue.

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2 Answers

I have table saw and the motor stop the work but make a noise like it want starter but is just the noise


check the output shaft to the blade side. the set screw on the arbor may have come loose

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sound like the rear bearing is stuck and the noise is the belt slipping on the idler pully and rear bearing needs replaced

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2 POSSIBLE THING'S ,1 THE BLADE IS BENT ,A CAUSE OBEING PINCHED IN MIDSTROKE OF CUTTING OR IF NOT THAT YOU CAN GET A FLAT WASHER TO USE AS A SPACER BETWEEN THE ARBOR BOLT AND THE BLADE TO MAKE UP THE DIFFERENCE.MAKE SURE YOU HAVE THE RIGHT ARBOR DIAMATOR BLADE IN THE SAW FIRST HOPE THIS HELPS.(PLEASE RATE THIS) THANK'S

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1 Answer

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The belt pully on the motor has a set screw that tends to get loose causing the pully to change position on the shaft. Position the pully on the shaft (move up or down) for better alignment with the pully on the rotating array pully and tighten the set screw..

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