Urgent Assistance Needed - PM-727M

That rust does not look good at all. There should be no rust on anything inside the housing. Anything should have had oil wiped on before assembly.
So you will probably re-assemble it better than they did in China..

Hope it's not too much... I fear something came loose and ****fted.
 
tweinke said:
Stupid question does the motor turn? How about the head, can you change gears or rotate it? Another silly thought did the setscrew for the collets back out and wedge the spindle?
Click to expand...

Yes, motor turned fine & H/L and 1,23 seemed to work & engage.


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woochucker said:
That rust does not look good at all. There should be no rust on anything inside the housing. Anything should have had oil wiped on before assembly.
So you will probably re-assemble it better than they did in China..

Hope it's not too much... I fear something came loose and ****fted.
Click to expand...

Thankfully, the hole the motor shaft fits into is not opened to the inside of the gear box. Can't imagine why it was so rusted though. This lathe is only about a year old.


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Didn't find anything catastrophic in the gear box, so I'm kinda at a loss as to what happened. Only thing I can imagine now is the either the 1,2,3 or the H/L knob jumped out of position. On the edge of some of the gear teeth there is some wear, but I really don't think it's bad enough to warrant changing. I'm going to put it back together and see what the result is. It'll be 3 days before I can get back to the shop though, but I will follow up on the out come.
Photo Feb 27, 3 42 53 PM.jpg



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Something happened in my gear box today that didn't sound good at all.
The machine locked up tight and blew the fuse before I could get to the OFF switch.

HOW FAST WERE YOU RUNNING IT ?

I WAS RUNNING MINE WIDE OPEN MAKING WOOD BLOCKS FOR MY TOOLING
AND I HAD SOME STRANGE GOINGS ON WHERE IT WAS STRAINING THE MOTOR .

THE SPINDLE WAS GETTING HARD TO TURN LIKE THE BEARINGS WERE LOCKING UP .
I STOPPED RUNNING IT AS SOON AS I KNEW THERE WAS A PROBLEM AND LET
IT COOL OFF UNTIL THE NEXT DAY .

IT FREED UP BUT IT WAS CLEAR THERE WAS A PROBLEM RUNNING IT AT HIGH SPEED
FOR EXTENDED PERIODS .
 
Lee, when I replaced the motor bearings on my 727, the output shaft was rusted just like yours. I remember thinking it was odd that there would be rust just down in that hole. Thank goodness that hole is sealed of where that rust can't get into the gear box. I cleaned it off with scotch brite and then actually coated it with grease before I reinstalled the motor. My guess is that there is a bearing somewhere that is starting to fail and it is seizing after it heats up. This may be a good time to remove the spindle and re-pack the bearings. I know Matt has told me that he recommends the Kluber spindle grease. It isn't cheap, but it is supposed to be really good.
 
3dshooter80 said:
Lee, when I replaced the motor bearings on my 727, the output shaft was rusted just like yours. I remember thinking it was odd that there would be rust just down in that hole. Thank goodness that hole is sealed of where that rust can't get into the gear box. I cleaned it off with scotch brite and then actually coated it with grease before I reinstalled the motor. My guess is that there is a bearing somewhere that is starting to fail and it is seizing after it heats up. This may be a good time to remove the spindle and re-pack the bearings. I know Matt has told me that he recommends the Kluber spindle grease. It isn't cheap, but it is supposed to be really good.
Click to expand...

Thanks for the feedback Chad, but all the bearings appear to be sealed. Was Matt recommending that the rubber seal be removed?


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The spindle bearings are supposed to be high precision tapered roller bearings. They will be located inside of the quill. I do remember Matt saying that the ball bearings inside the head were supposed to be open and splash lubricated by the oil in the head.
 
Per page 16 of the manual the spindle bearings are sealed and require no attention ( the PDF manual from the QMT webpage)
 
That's odd. The parts schematic shows a 30205 and 30207 tapered roller bearing in the quill. Those are not made as a sealed bearing to my knowledge.
 
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