Hey, ørnuløv; welcome!
Smoke sounds electrical not mechanical. Brushes OK?
Smoke sounds electrical not mechanical. Brushes OK?
collateral damage...Why would the wrong voltage cause a scratching sound on startup?
That was my saying for helpers when I was teaching them HVAC repair. I see it gets used for other learning experiences as well.Usually, when you let the magic smoke out, the tool is history. I hope you have better luck.
Charley
I have checked most of your points, and cannot find any of the specific symptoms, except the brushes are quite worn, though the springs seem ok.Does the smoke start in the first couple of seconds, or after it runs for a minute or two? Are the brushes worn or the springs that push them in damaged? Could you have gotten some lubricant or cleaner in the motor windings when you replaced the bearing? Are all the housing parts, bolts, screws, wire nuts, etc. tight and in place? Is any small part rubbing against a moving part? Any damage, scratches, debris in the motor's windings? Wiring smoke has a distinctive smell, is that what you smell? If you run it this way, does the fuse blow on that house circuit? Is there a short in the on/off switch? Does the speed control work? Any sign of a short on the speed control circuit, burned spots for example? If you take it apart and sniff the different parts, does one have a stronger aroma of smoke than the others? Are there any burned or melted spots where the power cord attaches to the router? Sometimes a stray strand or two of braided wire will short out Is there any lateral movement or play in the motor shaft, particularly at the end where the old bearing is located? All these things are where I'd start trouble shooting.