Dayton Grinder info

[jd5000]

Picked up an old Dayton bench grinder for $30. Looks like it is 1/2 HP, 3650 rmp and has 5/8" arbors. Can anyone tell me any info about it? I.e. what year was this made? Model number? Did Dayton make it or was it made by another manufacturer?

I turned it on and after shutting it off, it spun for 2 min and 6 seconds before coming to a complete stop. Is this good?

I would like to take it apart and repaint it. Is that an easy task for this grinder?

Thanks

 

[1982fxr]

Made by Doerr for Dayton. Great score.

 

[The Cobbler]

it spun for 2 min and 6 seconds

I would say that's indicating good bearings .
should be a simple tear down to repaint it , just remember how it goes back together! LOL

 

[B_Bimmer]

Beautiful.

 

[Doozer75]

I would say that's indicating good bearings .
should be a simple tear down to repaint it , just remember how it goes back together! LOL

I would say that's indicating there is zero grease in the bearings.

-Doozer

 

[jayemm]

I would say that's indicating there is zero grease in the bearings.

-Doozer

hopefully the bearings aren't noisy or running hot.

 

[Doozer75]

hopefully the bearings aren't noisy or running hot.

Replacing the bearings is a 15 minute job.
Nothing to be concerned about.

-Doozer

 

[kbuhagiar]

Picked up an old Dayton bench grinder for $30. Looks like it is 1/2 HP, 3650 rmp and has 5/8" arbors. Can anyone tell me any info about it? I.e. what year was this made? Model number? Did Dayton make it or was it made by another manufacturer?

I turned it on and after shutting it off, it spun for 2 min and 6 seconds before coming to a complete stop. Is this good?

I would like to take it apart and repaint it. Is that an easy task for this grinder?

Thanks

I would say you did very well!

 

[jd5000]

Thanks everyone!

Doerr. Was that a good manufacturer? I'm assuming the model number is 2Z341G (the cat no? Is there any way to tell what year this was made? Does the LR-15562 number in upper right mean that it was made in 1962 or does the "C78" in the Motor Ref mean that it was made in 1978?

Concerning the bearings and spin down time. How long would bearings in good condition take to spin down?

 

[Doozer75]

Grease them and you tell us.

-D

 

[1982fxr]

Thanks everyone!

Doerr. Was that a good manufacturer? I'm assuming the model number is 2Z341G (the cat no? Is there any way to tell what year this was made? Does the LR-15562 number in upper right mean that it was made in 1962 or does the "C78" in the Motor Ref mean that it was made in 1978?

Concerning the bearings and spin down time. How long would bearings in good condition take to spin down?

I've never seen much for dates on those. Not sure if it's hidden in numbers or not. The switch platform was removed in later models.

Doerr was the son of Baldor, or something real close to that. It's a good USA grinder. Prone to mounting corners breaking. Keep it bolted down evenly.

 

[1982fxr]

I don't have a dog in this fight...for YEARS on here, the longer the rundown time, the better.

Then about a year ago posts started showing up saying it was a problem.

Replacing bearings ain't no 15 minute job though. Takes me that long just to clear a space on the bench.

 

[Doozer75]

I have the exact same 7" Dayton branded grinder.
I know exactly how long it takes to change the bearings.
If your method or process is different, hey great.
Long coast down times mean no grease or hard grease.
Years of ignorance is just what it sounds like.
I have no dog in this fight here either.
It is a disappointment to see the lack of individual thinking
and total allegiance to the crowd collective here.
Society has been the same for thousands of years.
I would be a fool to expect any kind of intellectual
epiphany on a grand scale, so I don't. Most of the money
is possessed by the few and so is most of the intelligence.
And generally, these are not the same people.

-Doozer

 

[1982fxr]

Lighten up, Francis.

 

[The Cobbler]

the longer the rundown time, the better.

I'm in this camp , but I won't try to defend my thoughts any farther

 

[seber]

I have a Wissota that takes almost five minutes to coast down. It has been that way for over twenty years. It may be dry but that doesn't seem to be a problem. It is quiet.

 

[RTM]

Dayton is the Craftsman of the industrial world. They are the house brand of ¿Grainger?, and put their name on lots of power tools, motors, and tool boxes of various flavors. All good quality from what I’ve heard. The model number is probably a Grainger number, put it into their website, a similar spec grinder may still come up.

 

[micromind]

Doerr was one of the best if not the best motor manufacturer.

This is from memory so it may very well be less than completely accurate.

In 1920 or so, Ed Ballman and Emil Doerr worked at a machine shop that, among other thing, modified electric motors. They formed a partnership and opened their own shop....the Baldoerr electric company and began manufacturing electric motors, I believe 1/6 to 7 1/2HP.

A few things to remember here; back then, a 7 1/2HP motor was huge. Also, the AC capacitor wasn't invented and winding insulation was hygroscopic (it would absorb water).

I believe they were the first ones to make totally enclosed fan cooled motors and they first to use ball bearings as standard.

They later changed the name to Baldor, as it still is today.

Eventually, the split up and Emil and his son, Lee, started the Doerr electric company.

I believe they sold out to Emerson Electric but part of their contract allowed them to continue to sell Doerr branded motors. For a number of years, Dayton motors were manufactured by Doerr. There was a time when every part (except for the nameplate) of a Dayton, Emerson and Doerr motor was interchangeable.

Lees sons, I believe their names were Chris and Daniel, started manufacturing electric motors in 1974 under the name 'Leeson'. They were bought out by Regal-Beloit at some point but still make motors under the Leeson brand. I haven't hooked up very many of them since the buyout but they seemed to be about the same as before.

Baldor was bought out by ABB in 2018, since then I've hooked up over 100 of their motors all the way from 1/4 to 300HP. I haven't noticed much difference from the older ones. Maybe ABB was smart and left them alone........rare but it happens!

Both Leeson and Baldor are my top recommended brands.

Again, this is from my memory and might not be completely accurate.

 

[whateg01]

...

Baldor was bought out by ABB in 2018, since then I've hooked up over 100 of their motors all the way from 1/4 to 300HP. I haven't noticed much difference from the older ones. Maybe ABB was smart and left them alone........rare but it happens!

I bought some machinery from the old baldor plant in Clarksville, but I don't know what happened to that capacity. Did they just add it to another baldor/abb factory?

Back to dayton grinders, I have a 6" model and it takes about 2 minutes to wind down. The 8" grinder on Dad's bench has always taken forever to wind down. I'm 50 and remember that from when I was a kid. Doesn't seem to be any harm done, as long as it's still smooth and quiet.

 

[American Locomotive]

Any bench grinder with larger wheels (like 7") are going to spin for a very long time, even with well greased bearings. I wouldn't call 1-2 minutes unusual at all. Some of the "big" bench grinders have been known to take 10-15 minutes to come to a complete stop.

If it runs quietly and you don't hear the stereotypical "dry bearing whirring", I wouldn't worry about it.

 

[micromind]

I bought some machinery from the old baldor plant in Clarksville, but I don't know what happened to that capacity. Did they just add it to another baldor/abb factory?

Back to dayton grinders, I have a 6" model and it takes about 2 minutes to wind down. The 8" grinder on Dad's bench has always taken forever to wind down. I'm 50 and remember that from when I was a kid. Doesn't seem to be any harm done, as long as it's still smooth and quiet.

Quite some time ago, Baldor moved their manufacturing plant to Fort Smith, Arkansas and has since added several other locations and after being bought out by ABB, they have closed some of them.

 

[jd5000]

Thanks everyone for all the responses.

1) SPIN-DOWN: There is a debate about spin-down after the grinder is shut off. Many feel that long spin downs indicate that the bearings are in good condition and the grinder is well balanced. Others feel that the bearings are dry and need to be replaced or regreased. This is quite a difference!

2) YEAR-MADE: It appears that there is no date code anywhere on the grinder's label. Is there a way to come up with a date range that the grinder could have been manufactured based on the type of label (the one on this grinder is oval) and/or the features of the grinder?

 

[1982fxr]

At some point that switch changed from having a platform to not having one. Early 1990s? Total guess.

It's possible that that is when COO switched to Taiwan. Maybe call Grainger.