Electric motor question

[grizz02]

I looking to buy a floor or bench mounted belt sander is it better to get a 1 hp 220 volt vs a 1 hp 110 volt given everything else is equal, I can only assume the 220 would pull harder when a load is put against it

 

[MarkB_MI]

Well, one horsepower is one horsepower. But I wouldn't assume either motor actually puts out one horsepower under working conditions.

The 240 volt motor will draw half as much current as the 120 volt motor, which means less voltage drop and possibly better performance. But if you don't already have a 240 volt circuit in your shop, you'll need to add one. If you're going to use this tool a lot, I'd go 240. But for occasional use the 120 will be fine.

 

[kcm.MN]

It shouldn't matter either way. There isn't a lot of load put on a belt sander, and I don't know of any belt sander that starts under load. So if it were me, I would base my purchase on price, brand, etc. Not on 220V vs. 110V.

 

[Russ from MN]

I agree with Mark, 1 hp is 1 hp, but 220 is better! It may not be worth the cost difference if you have to update your wiring. One thing I noticed when we switched from a 110 to 220v water pump, the lights don't dim when it starts!

 

[Stephen Newell]

If you aren't running the sander all day it wouldn't matter which voltage you use. The 220 might run a little cooler if you are working it hard all day.

 

[wore out]

If you have adequate/''heavier'' wiring for 120 Volts it won't matter.

At all!

 

[Geo-TH,In]

In theory, 1 hp motor uses 746 watts.
120v , 6.2 amps.

Don't over think it, KISS.
Keep it simple, 120 volts.

 

[Loosehandle]

My opinion is that horsepower ratings are worthless on everything these days, look at watts.

 

[John T]

EITHER will work fine iffff ?? alls well HOWEVER iffffffffff you have 240 readily available ?? my advice is to run it at 240 versus 120. With only half the current (240 v 120) factors such as wire size, line voltage drop and relay switching requirements can make a difference. I was made well aware of such when I was an engineer at The Century Electric Motor Company but that was longgggggg ago ........

John T

 

[teddy52food]

Go with the higher voltage. I bought a planer that was on 120. When planing a wide board it would bog down. Changed to 220 & good to go full width.

 

[Geo-TH,In]

BTW.
A 12000 BTU window AC has a 1 hp compressor.
I've never seen a 12000 btu window AC run on 220v.
Again don't over think it! 120v will be just fine.
How many times will you have a big load on a sander?

 

[Janicholson]

On the bench it starts and runs 10 seconds and trips the breaker. If the start contacts are not opening at a % of full speed, it will do that, but the contacts will be fine looking. Look at the Start governor. Jim

 

[MarkB_MI]

> Go with the higher voltage. I bought a planer that was on 120. When planing a wide board it would bog down. Changed to 220 & good to go full width.

Teddy, I put one of Joe Newman's motors on my Craftsman joiner. It worked OK, except every time I'd run a board through the joiner it would get thicker.

 

[cleddy]

Thanks that gives me a direction to go om my Power washer motor. My motors have been in storage in a un heated barn and mud dobers and rust has been a big problem. Not like getting a new one from store for sure?? cleddy

 

[Steve@Advance]

Either voltage will deliver the same output power.

If you have limited 120v circuits, and there are other loads on the circuit, it will tend to trip the beaker because the motor alone draws something like 16 amps, near the limit of a 20 amp circuit.

If you want to keep it portable and have circuits to spare with a light load on them, then it will run fine on 120v.

If you have the 220v capacity and want to run it on a dedicated circuit, that will be a more efficient choice, especially if it gets loaded to the full capacity, which it probably won't.

 

[teddy52food]

You have it running backwards. It is putting the shavings back on.

 

[cleddy]

Checked that-oiled it up -cleaned contact switch and still no change? After a few bench test 10 second starts took motor apart and windings were all cool but comutator-(rotating) part was warm to hot. Nothing to try now but a larger breaker or 220 volts and see if it runs or SMOKES???

 

[MarkB_MI]

> You have it running backwards. It is putting the shavings back on.

Ah, that makes sense. I should have expected a device that generates negative entropy to behave that way. Thanks, Teddy!