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Saw motor runs but blade does not turn, nor is it loose. I realize it is direct drive (ie not belt driven) - any ideas as to problem and solution?

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  • craigb857 Apr 20, 2009

    Delta - solved, didnt realize this was belt driven, disassembled housing and found broken belt - thanks

  • efs_perpends
    efs_perpends May 11, 2010

    make and model of saw?



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I actually asked that question as a skeptic. I've never seen a direct drive table saw in 25+ years as a cabinetmaker... But I'm glad you got it solved!

Posted on Apr 20, 2009


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1 Answer

Rigid table saw blade frozen

Well with only this info it could be a lot of or many failures to lock it down . First is it belt driven or direct shaft drive.if it is belt driven ,
(possible more not likely ) then unplug power supply .locate belt and follow to bearing journal and pulley on the blade end . pull from this end in the direction the teeth are facing(forward or fryont )
. Shouldn't take much effort.the idea is to roll any foreign object
clear , or free of smaller areas that would bind or jam any part of the drive train . While your there check belt
TIP: usually,almost any type of motor that has a belt for the drive train, has built in thermal overloads .. Like a fuse when it gets hot ,
the solder pot melts thus opening the circuit . They reset themselves In a time vs. Temperatures. Depending on the melt point of pot ( some in mins , some in hours ) . For yours it takes 15
mins or so to allow solder to cool and the link has made continuity thus closing the circuit. If belt slips around pully but motor shaft turns , something or some object has gotten between frame and drive ,or the bearings are seized up on the blade end . That's why we roll the belt at the blade end istead of turning shaft at motor end . The only other thing is if it's a direct shaft drive , you still will be looking for a jam piece , however possibly a locked rotor in side motor ,, meaning the out put (Armature ) shaft extending from motor to blade has seized up internally .Again check bearings if direct shaft .,,also more and more power tools are coming with a brake on them . As soon as the user has taken the power of
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Best to Ya. A. Goodwin

Sep 15, 2016 | Saws

1 Answer

The motor runs but the blade does not turn

UNPLUG the saw! IF your saw is a direct drive; either the blade is loose or the center of the blade is broken, Or the motor shaft has broke off. IF your saw is BELT DRIVEN, check the belt tension, or belt condition.

Jan 20, 2014 | Delta Saws

1 Answer

Screeching noise

Not sure which saw you have, but you should first see where the noise is coming from. If this is a belt driven saw, then slip the belt off of the motor (you can leave it on the saw arbor) so that the motor can turn alone. Run the motor and you will quickly find if it's the motor or the saw awbor (that's the shaft that the blade mounts to). The motor might have oil caps. Post again your results if you still need help.
Good luck.

Nov 18, 2012 | Craftsman 10" Table Saw

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Why is my tile saw making different noises?

Sounds like you have bearings going/gone bad. If it's a direct drive model, check the bearings in the motor and on the arbor. If it's a belt driven model check the bearings on either end of the arbor shaft. As bearings go bad, someone using the saw regularly will notice a different tone in the tool. If you are getting vibrations that bad, the bearings are already loosing balls or the race is tore up and all the balls are on one side and can't doing their job correctly.

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1 Answer

I have an older Craftsman's Table Saw. I use it for a few minutes an then it looses its torque and can't saw no matter the thickness of the wood. Is it the motor?

Is it with belts connecting from motor to blade , or is it direct drive ( like in a circular saw) ? Belts do wear and need to be tightened or replaced. If it is direct drive, is could be the motor contact brushes on the armature that are burned or worn. They will allow the motor to run but not give the power when called for. Brushes are usuall y accessible from the outside of the motor from small plastic (bakelite) screw caps (2 of them). Finallt, it could be the blade lock nut and tension washer. This you will know because the blade will begin to snow and not cut the material, yet the motor sounds as if it is running standard speed.

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1 Answer

Motor runs but blade does not turn

It seen like the blade is loose or driven pin or key way is missing

Sep 09, 2010 | Delta TS200LS Shopmaster 10 Inch Portable...

1 Answer

I have an old craftsman table saw. i believe the "brake" or gears a shot. the saw runs very loud and shakes. now no matter how much i tighten the blade the nut loosens after one cut.

With the saw unplugged and the blade tightened, using your fingers try to wiggle the blade side to side and lift it up and down. Other than a little flexing of the blade, there should be no movement. If you have much movement you have a problem and the saw is dangerous. If this is a belt-driven saw, then you may be able to replace the bearings on the arbor (the shaft the saw mounts to) or you may have to replace the whole arbor. If this is a direct-drive saw (the saw mounts directly on the motor shaft) then the bearings that have failed are in the motor and you are less likely to be able find and install replacement bearings. If you find the model number of your saw, you might be able to find drawings and replacement parts on this site:
Thanks for using FixYa. Let me know if I can help more. Good luck. Al K

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1 Answer

The blade spins to fast and torque is very low. What do I replace

If this is a belt driven saw, maybe the pulleys on the motor and arbor are reversed? If both pulleys have the same size hole and the one on the motor is larger than the one on the saw arbor, then you should switch them. This will lower the RPM and increase torque.
If this is a direct drive saw (the motor shaft is the saw arbor) then the only recourse is to use a smaller blade.

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Motor turns...blade does not turn.

belt driven then belt
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Apr 01, 2009 | Saws

1 Answer

Two drive configurations

Direct-Drive Motors are linked directly to the blade and transfer all of the motor’s power to the blade. Belt-Drive Motors have a belt that transfers power from the motor to the blade. In belt drive systems, the motor can be offset away from sawdust generated during operation, causing the motor last longer. Belt drive systems require slightly more preventive maintenance than direct drive systems. So you'll need to check the belts for wear and proper tension periodically.

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