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1 hp electric motor for table saw quit running. took it to repair shop, after cleaning with compressor. he said it runs fine. reconnected to saw, it will not work now.

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Check the switch, the cord and the outlet

Posted on May 07, 2017


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My 3000 watt Duracell inverter will not start a 1 1/2 hp electric motor. The voltage drops to 45v and the electric motor struggles to reach full rpm. This is a table saw with no load. The generator revs...

have the saw motor checked for internal and wiring problems
check the start/run capacitor of the electric motor
running a 1 1/2 hp motor (1075 watts) on a generator that has a running wattage of around 2250 watts means that it should start and come to speed immediately if the motor is good
the problem indicates that there is a circuit problem in the saw motor that is exceeding the available wattage (3000 watts ) on start up

Oct 22, 2017 | Duracell DS30R1i 3000 Watt Continuous...

1 Answer

Craftsman 8'' direct drive table saw only hums

Safety note - make sure to disconnect the power from the wall before you start checking this stuff.

Odds are it's one of four problems. The first is easiest to fix and most likely. The other three are probably best dealt with by an electric motor repair shop.

1) Start capacitor failure. Capacitors age and eventually die. If you know a bit about electronics, you can disassemble your motor, remove the capacitor and test its capacitance (it will have a label identifying its capacitance in microfarads (mfd)). If the capacitance measures way lower than the label says, buy a replacement of the same capacitance (try Granger) and you'll be back up and running. Be careful though, capacitors are batteries and they can give you a pretty good shock.

2) Shaft locked up. If you can turn the pulley on the motor by hand, this isn't the problem.

3) Start switch failure. This switch is inside the motor. Since you're asking this question. you should probably get a repair shop motor shop to handle this.

4) Winding failure. Since it's been working fine, pretty much all that would happen here is a wire coming loose inside or it might have burned up. If a continuity check on them fails, the windings are probably at fault.

Jun 07, 2010 | Craftsman 10" Table Saw

1 Answer


Sounds like you may have overheated the motor. I'm surprised the overload on the motor didn't trip first. With this overheating, the windings in the motor have basically shorted out to ground. This is why your breaker is tripping. Rewinding the motor is no longer the option these days. You can try going online to

May 15, 2010 | Craftsman 10" Table Saw

1 Answer

What capacitor should be on a table saw motor

The part number you reference is a start capacitor. (details can be seen here: )

It appears that the component capacitors (there are 2) are not available as separate parts from Delta. They only reference the motor itself (part 220 in the diagrams listed below.)

At this point, I would try to locate another saw of the same model and read any numbers that may appear on the original capacitors on the motor. Please note the location and connections of each. There should be a run cap and a start cap on the motor.

The differences between a 47uFD and 20uFD caps are not an issue in this application.


Jan 20, 2010 | Delta Saws

1 Answer

Table Saw stops and won't restart

On some motors they are not sealed saw dust gets in the motor and can cause them to overheat they have a themal coupler built in the motor it is being tripped .On sears you can got to sears replacement parts and get a new coupler.If you are not familiar with electric motors.Please take the motor off unplugged!!! mark the ends and caps with a mark or line so you can line them back up on either end .Remove the covers on the ends clean out the motor if full of stuff blow out or use a can of electric motor cleaner available auto parts stores clean all parts find the coupler go to craftsman parts they have a parts diagram online so you can identify it replace it try again if it still does it replace the motor or the saw.

Nov 11, 2009 | Craftsman 10" Table Saw

1 Answer

Table saw capacitor heats up and explodes.

The wrong capacitor for one thing. There are starting caps and running caps. The starting cap is in the circuit for only long enough for the motor to get up to speed. If you have a Leeson motor that has a start and run cap then the run cap may not be the correct on. If you have a start cap blowing out I suggest you check the centriifugal switch in the end of the motor. It may have welded the contacts shut. In any case, I would take it to a motor shop .

Mar 11, 2009 | Powermatic 66 10" 3 HP 1 Phase 230V Table...

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