maury
Junior Member
Posts: 58
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Post by maury on Feb 10, 2019 18:14:36 GMT
I've got an M3 with the 400w spindle motor. I've balanced the fan blade on top so I feel no difference in vibration of the motor itself with or without the fan blade installed. I normally run the spindle at full speed.
I get a vibration on the Z axis what seems to be the top 8mm bearing blocks on the shaft. Comes and goes as the Z axis goes up and down. Sometimes a lot and somestimes not. The vibration can be felt on the spindle motor and mount.
I have replaced the top 8mm bearing blocks (ebay Chinese) and also the shafts which appear to be .0005" larger in diameter than the original.
Any thoughts on reducing this bearing noise? I thought of trying non ebay Chinese bearings inside the blocks such as McMaster Carr (the $20 a piece ones, ouch!).
Perusing the internet for this issue tells me to live with it. Since I can't measure the vibration, I don't know the run out. It's probably more of a nuisance than detrimental. Or should I just use earplugs.
Help me Obi-Wan Kenobe, you're my only hope. :-)
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maury
Junior Member
Posts: 58
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Post by maury on Feb 11, 2019 13:45:53 GMT
I might have got the bearing problem issue resolved. I found a little play in the bearing housing where the bearing slides in. More than a clearance fit. I drilled and tapped the bearing housing on the side for a 5mm screw, reassembled and bumped the screw up tight against outside of the internal bearing. I reinstalled in the machine and seems to do the trick Buzzing and vibration are gone. Going to have to get some thread locker stuff though. The vibration wasn't that much but it bothered me. The machine runs nice and quiet now.
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Post by Derek the Admin on Feb 11, 2019 16:04:01 GMT
Glad that worked out. Thanks for the update.
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