need help with my radial arm saw

[Telesis]

I bought a 113.197601 secondhand (10" Craftsman radial arm saw). I got it home and it would only work with one of my extension cords. It worked perfectly for about three days and today I went to finish the project I am working on and it work fine for a while and now it won't work with either extension cord. It just kind of hums until it blows the breaker either on the plug block that I have the cords plugged into or the breaker at the breaker box on the side of the house if I bypass the plug block. It only throws the breaker if I leave the saw on for about 5 seconds. If I turn the saw on and instantly turn it back off it does not throw the breaker, it just hums. Any idea what is going on here?

Thank you,

Ron Katz [e-mail]

[ks]

Try plugging directly into wall socket, or get heavier extension cord, it might not be getting enough juice. Or rotate blade by hand to different spot and then power up, you may have a burnt out winding.

[Joe Tylicki]

I have an extension cord as thick as my arm (well, close) for any tool I use that pulls double digits in amperage. The thinner the cord, the more voltage drop you have over the circuit, and the more amps the motor needs to pull to work. Plugging a 15 amp saw into a household grade extension cord is a recipe for disaster.

Joe

[Darin]

So... does that mean you have really thick extension cords, or just really skinny arms? :-)

[JAMES Mankin]

well this may sound stupid but make sure the blade is not touching the table. my great uncle offered great granddads craftsman ras to my brother we drove 41/2 hours one way to go pick it up ran fine had everything so we loaded up I droped my brother off with his new old toy than drive 11/2 hours home next day get home to find a mesage from him every time he trys it it blows the breaker so anouther 11/2 hour drive an about 15 trys of my own I realized the tip of the teeth were to deep in the grove so when we hit the power the blade could not start to spin so it would blow the breaker so simple such a pain

jim

A MAN WITH THE RIGHT TOOLS CAN SURE SCREW THINGS UP

[dteckie]

Jim makes a good point, I was thinking along same lines. Sounds like the blade/motor may be binding rather than a cord problem. Unless you are using one of those real skinny 22 awg wire (for lamps only) cords. If you are using 14 awg or thicker wire and under 10 ft long you should be fine.

[BIG JOE]

Short, stubby arms, so I was probably exaggerating just a wee bit.

Joe

[Chipper Wood]

'Locked Rotor' Something mechanical is preventing normal start up. Bad bearings, Rusted shaft, improper blade installation, just to point out a few causes. The thermal overload protector should have kept the windings safe. However Murphy's law is always applicable.

[Wilson]