12” Pedestal Grinder Restoration

[lmorris9935]

I picked this beast up the other day. Not sure on brand or motor specs or anything because ifs all gone or worn off. From googling it looks like Standard Electric Conpany 12” pedestal grinder maybe? It’s wired 110v right now and takes a little bit to get up to speed. The wiring underneath it is a mess and seems to be a couple wires not connected to anything. My question is how would one go about rewiring this thing and I’m figuring it should be 220v? Is that why it’s taking so long to come up to speed? I watched some videos online and they all seems to get to speed much quicker than mine. None of the wires seem to be labeled with anything I can make sense of but I’m hesitant to take it all apart if I’m not sure I can wire it back.

 

[lmorris9935]

I picked this beast up the other day. Not sure on brand or motor specs or anything because ifs all gone or worn off. From googling it looks like Standard Electric Conpany 12” pedestal grinder maybe? It’s wired 110v right now and takes a little bit to get up to speed. The wiring underneath it is a mess and seems to be a couple wires not connected to anything. My question is how would one go about rewiring this thing and I’m figuring it should be 220v? Is that why it’s taking so long to come up to speed? I watched some videos online and they all seems to get to speed much quicker than mine. None of the wires seem to be labeled with anything I can make sense of but I’m hesitant to take it all apart if I’m not sure I can wire it back.

 

[blazemaster83]

Thats a cool one. How many wires come out of the motor? I would wire that for 220v if you have it available. It should come up to speed a lot faster.

 

[Packard V8]

Difficult to imagine a 12" grinder being able to operate on 115-volt power.

Without the wiring diagram which came with the motor, it's going to be a challenge to convert to 230-volt. Do a search, ask for help here and over on the OWWM site.

jack vines

 

[kbuhagiar]

Thats a cool one. How many wires come out of the motor? I would wire that for 220v if you have it available. It should come up to speed a lot faster.

???
My understanding has always been that, whenever possible, it's beneficial to run at 240V due to more efficiency and slightly lower energy consumption. However, I've had compressors and other bench/power tools (but no grinders) which were dual (120/240) voltage, and have used them at both voltages, and have never observed ANY differences in either performance or run speed. Are grinders the exception to that rule?

 

[250]

Standard Electrical Tool Co. - Publication Reprints | VintageMachinery.org

See if you can find your model here. I think there its likely its 220/440 3ph, but they did make grinders in 1ph, 2ph, and 3ph, in 110-550v.

 

[lmorris9935]

So I have found the model actually it’s B-line. Which was Brown-brockmyer and turned into Dyna Electric Motor Company. I have 8 wires coming out the back of it. 2 of them are not connected to anything I’m assuming these two will make it 220? I have no clue though. I need a way to figure out how to make these 8 wires identify themselves and then obviously wire it correctly. HELP!!

 

[Nortonscustom]

So I have found the model actually it’s B-line. Which was Brown-brockmyer and turned into Dyna Electric Motor Company. I have 8 wires coming out the back of it. 2 of them are not connected to anything I’m assuming these two will make it 220? I have no clue though. I need a way to figure out how to make these 8 wires identify themselves and then obviously wire it correctly. HELP!!

Take it to a motor repair shop. I had an old lathe motor that all the wires were unmarked and a mess. Dropped it off at the local motor repair shop. Next day got it back with all the leads properly tagged. Cost $20.

 

[2oolhound]

Most of those beasts are 3 phase.

 

[The Cobbler]

???
My understanding has always been that, whenever possible, it's beneficial to run at 240V due to more efficiency and slightly lower energy consumption. However, I've had compressors and other bench/power tools (but no grinders) which were dual (120/240) voltage, and have used them at both voltages, and have never observed ANY differences in either performance or run speed. Are grinders the exception to that rule?

there's no cost savings or efficiency over 120 volts . 240 just allows a smaller wire gauge to be run.