Which motor is better?

jondann · Post by **jondann** » Wed Aug 24, 2011 2:49 pm

I'm rebuilding a mid-70s headstock. It came with an AOSmith 1 1/8Hp motor. I have a mid-80s Emerson 1 1/8Hp motor from my recent PowerPro upgrade. Is the Emerson better than the AOSmith, or are they the same? Which should I use?

JPG · Post by **JPG** » Wed Aug 24, 2011 3:08 pm

jondann wrote:I'm rebuilding a mid-70s headstock. It came with an AOSmith 1 1/8Hp motor. I have a mid-80s Emerson 1 1/8Hp motor from my recent PowerPro upgrade. Is the Emerson better than the AOSmith, or are they the same? Which should I use?

Whichever one has the better bearings. If you cannot tell any difference, it doesn't matter. They are both excellent motors.

wiredone · Post by **wiredone** » Wed Aug 24, 2011 4:44 pm

JPG40504 wrote:Whichever one has the better bearings. If you cannot tell any difference, it doesn't matter. They are both excellent motors.

I'm told that the emerson has a bushing on one end instead of a bearing.
If that's true, my vote would be for the AO Smith

beeg · Post by **beeg** » Wed Aug 24, 2011 5:27 pm

Id' leave the AO Smith in. One less thing to do.

jayp413 · Post by **jayp413** » Wed Aug 24, 2011 6:02 pm

JPG40504 wrote:Whichever one has the better bearings. If you cannot tell any difference, it doesn't matter. They are both excellent motors.

Is it a difficult task to replace the bearings?

Shop_Smith_Poppi · Post by **Shop_Smith_Poppi** » Wed Aug 24, 2011 8:51 pm

No its very easy actually. Use a side hammer with a 90 degree (anyone know how to get a degree symbol?) flat hook that will fit through the bearing. Hook it on the back side of the bearing and hit the hammer on the side. it should pop out in a few hits.

of course you will have to to take the ends of the motor housing off first.

jayp413 · Post by **jayp413** » Wed Aug 24, 2011 9:40 pm

Shop_Smith_Poppi wrote:No its very easy actually. Use a side hammer with a 90 degree (anyone know how to get a degree symbol?) flat hook that will fit through the bearing. Hook it on the back side of the bearing and hit the hammer on the side. it should pop out in a few hits.

of course you will have to to take the ends of the motor housing off first.

Thank you for the tip! I have a grinding bearing and I believe it is coming from the motor.

robinson46176 · Post by **robinson46176** » Wed Aug 24, 2011 9:51 pm

90°

.

beeg · Post by **beeg** » Wed Aug 24, 2011 10:16 pm

Shop_Smith_Poppi wrote:(anyone know how to get a degree symbol?)

Hold down the "ALT" type 0176. That will give ya a ° . You HAVE to use the calculator key pad on the right hand of the keyboard.

JPG · Post by **JPG** » Wed Aug 24, 2011 10:37 pm

wiredone wrote:I'm told that the emerson has a bushing on one end instead of a bearing.
If that's true, my vote would be for the AO Smith

The 1 1/8hp Emerson has a 5/8" bearing on the back end. The Emerson power station motor has bushings(both ends).

All 1 1/8hp motors have 40mm od x 12mm depth bearings. The shaft end bearings have an id of 17mm. All but the Emerson also have a 17mm id back end bearing.

i.e. Emerson ......Others ......(1 1/8hp)

......17x40x12 ....17x40x12 ... shaft end bearing
....5/8"x40x12 ....17x40x12 ... back end bearing