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8th February 2024, 03:25 PM #1Senior Member
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Strange noise in 2HP dust extractor motor
Hi everyone, haven't been on for a few years as woodworking hasn't been part of my life recently but I'm working my way back in to it.
I have a Toolex 2Hp dust extractor that ran quite well for a few years (as well as these units run anyway) but I recently started it up to test it and the motor is making a horrible sceeching noise. I have taken the front plate off and had a look, the rotor was covered in what looked like either surface rust or dried lubricant of some sort so I have cleaned all that off (the stator is nice and clean) but the rotor spins on the shaft and can move up and down between the front and read bearings. The shaft seems to be splined but the rotor still spins over the splines and it looks like there may be space for a small key in the rotor housing but not on the shaft.
Any ideas on what the issue might be? It seems the noise is coming from the rotor spinning on the shaft and when I turn the motor off, the shaft stops immediately but I can hear the rotor spinning in the housing. The fan used to take a while to slow down after turning off but now it seems to just stop dead while the rotor slows down.
Cheers
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11th February 2024, 11:08 AM #2
Hard to say without seeing it but there should be a grub screw on the rotor (impeller) that holds the key in place. I had one come loose on a bandsaw pulley. Both grub screw and key never seen again. I would take the rotor off as you will have to check inside the bore is not chewed out then hopefully you find the key and grub screw in the blower housing or in the dust bag. While it's off run the motor and listen for unusual noise to rule out the motor bearings.
Regards
John
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