59 of 62 people found the following review helpful
Poor quality control,
This review is from: JET 708663PK JTAS-10XL50-W1 10-Inch Left Tilt 3-Horsepower 10-Inch Cabinet Saw with 50-Inch Xacta II Fence, 2 Cast Iron Extension Wings, Table Board, and Legs, 230-Volt 1-Phase (Tools & Home Improvement)
I have a 3hp Jet table saw that went up in flames last week. Well at least the motor did.
Keep in mind that I have NEVER touched the motor on this saw.
I was working on the table saw and smelled something very nasty. It was not wood or even a hot wire. It turned out to be the run capacitor on the motor over heating and burning up
The next day I pulled the motor out (not an easy chore as the motor weights over 70 pounds). When I got the motor off its mounting plate and outside the table saw cabinet, I pulled the cover of the outer enclosure where the power wire from the magnetic switch connects to the motor. The inside was PACKED with dust. "Where's the gasket?" I asked myself. Not good.
So I put the motor on the bench and removed the metal covers from the capacitors. One is the run capacitor; the other is the start capacitor. Once again, both of these covers were packed with dust. There are 2 wires running from each cap to the inside of the motor through a hole and I could see dust inside the motor. Not good. A TEFC (totally enclosed fan cooled) motor - right? Well Jet should call theirs a BEFC (barely enclosed fan cooled) motor.
Anyway, the run cap was totally melted down so I took the motor to a local repair technician that spent 2 hours talking to me and diagnosing the motor. He hooked up a new run cap and bench tested it first. Everything sounded fine but a squeal started emitting from inside of the motor. So he pulled the motor apart only to find the inside full of wood dust. The wood entered through the holes in the case where the cap wires pass through. Then HE said "Not good". The windings were discolored. They began to overheat causing more resistance in the windings causing the run cap to overheat causing the cap to catch fire.
He told me run caps hardly ever go bad and that the dust entering the windings were the cause. But he went on to say that the lack of rubber gaskets on the covers was the root cause. Clearly Jet's fault. So I e-mail Jet with my explanation and their response was:
"THE WARRANTY IS OUT ON YOUR MACHINE"
This was their entire response. And in all CAPS to boot!
Now here's the kicker. I am forced to buy a replacement motor from Jet. I wanted to buy a Baldor or Leeson motor. Even a Dayton would be better AND cheaper. But no. Electric motors follow national specifications published by NEMA. NEMA specifies the dimensional characteristics of the mounting plate, shaft diameter, and distance from the mounting plate to the center of the shaft. All critical for a given application, but not with Jet. This motor has all NEMA 56 specs EXCEPT the shaft diameter.
If you are considering buying a Jet product, check for these gaskets.
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Initial post: Jul 8, 2012 4:48:21 PM PDT
S. Goodman says:
If only the shaft diamiter is differant than replace the pully. Problem solved.....
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