Date of manufacture of Craftsman motor?

[Radio Ron w4ron]

I've got an old Sears Roebuck Craftsman double shaft AC motor,
I wonder if anyone can give me some idea when it was made.
Here's the info that's on the data plate;

Sears Roebuck
CR260K20
115726
L4 51

I don't have a photo of it right now.
I did a google search using this data and found nothing.
I kinda think it's from the early 50s, it was in his workshop
all my life. It's a hoss, heavy as heck, rated at 3/4hp.
I've mounted it on my bench and have a 8" grinding wheel
and a 8" wire brush wheel.
It's amazing that the chinese grinder I replaced with this one
was also rated at 3/4hp, but it had no power at all, all I had to
do was touch anything to either wheel and it would just stop,
I think I could have stopped it with my bare hand.
The old Craftsman is a beast, I tried to stop it by digging an old
file into the wire brush wheel, I don't think it even slowed
down at all.
That piece of chinese **** is going to the dump the next time I go


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[jakemac]

L4 51

That should be a 1951 date.
I'm still not sure what the L4 stands for. It could be the factory, the production line, a batch number, additional date coding ?


There should be one more number in the serial number - 115.726(?)

 

[Radio Ron w4ron]

That should be a 1951 date.
I'm still not sure what the L4 stands for. It could be the factory, the production line, a batch number, additional date coding ?

There should be one more number in the serial number - 115.726(?)

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The 1951 date fits perfectly with what I thought.

You're right about there being a forth number, I had to rub on the
name plate some more and I found a 7, so the correct number
is 115.7267.


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[Outlawmws]

Pics of the emblem can also help confirm the date code, but I'd agree with 51 sight unseen.

 

[Fifelaker]

115.XXXX was made by Packard electric. http://vintagemachinery.org/Craftsman/manufacturers.aspx?sort=1