I have a homebuilt RPC. It is a 10HP Baldor motor running 1760 RPM, using a start capacitor and run capacitors. It runs my mill, lathe, surface grinder just fine.
However it is noisy. Compared to a commercial unit, very noisy. I have been messing with insulation and isolation. And on a hairbrained whim I set the motor on its butt so the spindle was vertical and it was *significantly* quieter.
Two questions:
1) Is this indicative of bad bearings?
2) Assuming sufficient clearance for airflow, is there any reason I can't just run it in the vertical orientation permanently?
I haven't cracked the case on the motor. The heritage of the motor is unknown but it is rust free and appears in good shape. No real runout and spins up like a champ. $50 on Craigslist from a guy who said he was saving it for a project that never happened, pulled from working service.
thanks
philip
However it is noisy. Compared to a commercial unit, very noisy. I have been messing with insulation and isolation. And on a hairbrained whim I set the motor on its butt so the spindle was vertical and it was *significantly* quieter.
Two questions:
1) Is this indicative of bad bearings?
2) Assuming sufficient clearance for airflow, is there any reason I can't just run it in the vertical orientation permanently?
I haven't cracked the case on the motor. The heritage of the motor is unknown but it is rust free and appears in good shape. No real runout and spins up like a champ. $50 on Craigslist from a guy who said he was saving it for a project that never happened, pulled from working service.
thanks
philip