Dayton Grinder 1Z707S

[ex_nihilo]

Hi All,

I'm in the process of resurrecting this US made Dayton 3/4 HP grinder from the dead. I was completely unsuccessful in finding anything about when it was made. Nothing on the web that I saw and the folks at Grainger had no info either. Does anyone know when this might have been manufactured?

I forgot to take pics when I started. I had already removed the wheel guards, tool rests, and eye guards. I'll include a picture of them when I was stripping the paint just in case seeing the wheel covers may help.


Any insight?

Cheers!
Martin

 

[454ragtop]

Can't help but think that box on the top right is a date code - 1962 (?), though looking at the grinder I'd have guessed a little newer than that.

 

[ex_nihilo]

Can't help but think that box on the top right is a date code - 1962 (?), though looking at the grinder I'd have guessed a little newer than that.

Interesting observation 454. I would have also figured it later than '62 but it could be. The plastic rocker switch sure makes it seem newer. I was also surprised to see Nachi bearings in it. Made me wonder if someone had already been there, done that or maybe Nachi is older than I think.
The capacitor cutoff is a centrifugal switch on the rotor. I assumed that was an older method but that's just based on the Craftsman pre-block vs block difference. I've never replaced bearings with a switch on the rotor before so it was a little more of a pain.
One of the culprits was a wire to the centrifugal switch got chewed up presumably by the rotor. A short in the plug was the other.



Sent from my SM-G973U using Tapatalk

 

[1982fxr]

I've never seen an actual answer on when those went from USA Doerr to imports.

My theory (I have no proof), is that the older Doerr units had a platform where the on off switch was. And that was removed when they became imports. Which would make that a more modern import.

Just a theory. No proof.

 

[1982fxr]

This is Doerr badged but they also made Dayton and others

 

[ex_nihilo]

I've never seen an actual answer on when those went from USA Doerr to imports.

My theory (I have no proof), is that the older Doerr units had a platform where the on off switch was. And that was removed when they became imports. Which would make that a more modern import.

Just a theory. No proof.

Seems plausible. Maybe this could explain the Nachi bearings.

 

[ex_nihilo]

This is Doerr badged but they also made Dayton and others

That's a nice looking grinder. I do see a lot of similarities but that one definitely has features of an older model.

Too bad no one seems to know the dates.

 

[exmaxima1]

I've never seen an actual answer on when those went from USA Doerr to imports.

My theory (I have no proof), is that the older Doerr units had a platform where the on off switch was. And that was removed when they became imports. Which would make that a more modern import.

Just a theory. No proof.

I tend to agree with you. That base with the power switch safety wings sure looks like an import model. Very similar to my Taiwanese-made Dayton 10-inch grinder.

 

[1982fxr]

Here's a little info. Grainger bought Doerr in 1969 and sold it in the mid 1980's.

http://vintagemachinery.org/mfgindex/detail.aspx?id=3005

Based on nothing, I'd guess they became imports around the very early 1980's.

What's the earliest Taiwanese grinders anyone has seen? Didn't Craftsman switch around 1982?

 

[1982fxr]

Just started this thread about the first Asian bench grinders...

https://www.garagejournal.com/forum/showthread.php?p=7832447#post7832447