I just purchased a 1966 Bridgeport Mill that has a 3/4 HP, single phase motor (110/220 VAC) that appears to be original. I have two questions about this motor:
1. I can't find anything that says Bridgeports were made with 3/4HP motors. Everything I find says their smallest motor was 1 HP - is this the original motor? It looks original.
2. I've only run it up one-time to drill 30 1/2" holes through .125 thick material. I did stack the material so I was actually drilling through a thickness of .625. After drilling four holes I noticed the motor was extremely HOT and the drill slowed to almost a complete stop with almost not effort. I immediately stopped what I was doing. I didn't notice any smoke coming from the motor, but it was way too hot to touch. I will admit I miscalculated my speed for the material I was drilling. I was running it at 1115 instead of the 660 I should of set it for, but I was using lubricant and I wasn't applying excessive force. I mean, my grizzly drill press with 1/2HP motor hogs through mild steel with a 1/2" drill bit, so I fear this motor must be shot.
- Is my motor shot, or are the 3/4 HP BPs that weak?
- It's wired for 115VAC - will wiring it for 220VAC correct this? I know it will the lower the amperage.
Any tips or ideas for me to check out wiould be greatly appreciated.
Thank you!
1. I can't find anything that says Bridgeports were made with 3/4HP motors. Everything I find says their smallest motor was 1 HP - is this the original motor? It looks original.
2. I've only run it up one-time to drill 30 1/2" holes through .125 thick material. I did stack the material so I was actually drilling through a thickness of .625. After drilling four holes I noticed the motor was extremely HOT and the drill slowed to almost a complete stop with almost not effort. I immediately stopped what I was doing. I didn't notice any smoke coming from the motor, but it was way too hot to touch. I will admit I miscalculated my speed for the material I was drilling. I was running it at 1115 instead of the 660 I should of set it for, but I was using lubricant and I wasn't applying excessive force. I mean, my grizzly drill press with 1/2HP motor hogs through mild steel with a 1/2" drill bit, so I fear this motor must be shot.
- Is my motor shot, or are the 3/4 HP BPs that weak?
- It's wired for 115VAC - will wiring it for 220VAC correct this? I know it will the lower the amperage.
Any tips or ideas for me to check out wiould be greatly appreciated.
Thank you!