Author Topic: Vintage Craftsman "Block Motor" bench grinder info -  (Read 56416 times)

Offline mtkst19

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #30 on: May 02, 2012, 11:57:47 PM »
here are my two grinders.  one was new in box for $50, other was used for $20


Offline Frederick Flintstone

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #31 on: May 03, 2012, 01:19:04 AM »
the second one belongs at my house.
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Offline mtkst19

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #32 on: May 03, 2012, 12:14:14 PM »
its funny that i paid the same as or less than the clarke import 8 inch grinder that i bought when i 1st got my garage up and going.  you can just tell when you flick the switch on that these old grinders are better unit.  come up to speed instantly and don't bog down like the import models do.  Makes you wonder how they can rate it the same when realistically they are no where near similar. 

Offline torqueman2002

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #33 on: May 03, 2012, 03:01:18 PM »
the second one belongs at my house.
??!! Now I gotta look for 1/2 HP AND 3/4 HP block grinders for you, FF?!   Will the madness never end!??   fishslap

I hope not.   thumbsup2
« Last Edit: August 11, 2012, 12:31:06 PM by torqueman2002 »
I am a Blockhead, Man! http://tinyurl.com/CM-Block-Grinders-Why-the-Fuss

"I got to show the young boys how not to do it. I haven't showed them everything not to do, yet. It's a big job!" - Otto Kilcher

"Well, I don't wanna be a superman, I just wanna go somewhere, use my hands, and keep it simple. Oh real simple" - Keb' Mo'

Offline torqueman2002

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #34 on: May 03, 2012, 03:03:03 PM »
Anyone know the difference in a "Commercial" labeled block grinder and non-Commercial ones?
I am a Blockhead, Man! http://tinyurl.com/CM-Block-Grinders-Why-the-Fuss

"I got to show the young boys how not to do it. I haven't showed them everything not to do, yet. It's a big job!" - Otto Kilcher

"Well, I don't wanna be a superman, I just wanna go somewhere, use my hands, and keep it simple. Oh real simple" - Keb' Mo'

Offline toolguybak

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #35 on: August 11, 2012, 10:51:25 AM »
For clarification:

Source code 115 is Packard Electric (Division of General Motors), which included Sunlight Electric Motors (and grinders) back in the 1930s.
Source code 397 is Delco (Division of General Motors).
Source code 257 covers Allegretti & Co and Paramount, who continued the Delco models for Sears.

Offline torqueman2002

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #36 on: August 11, 2012, 12:33:39 PM »
For clarification:

Source code 115 is Packard Electric (Division of General Motors), which included Sunlight Electric Motors (and grinders) back in the 1930s.
Source code 397 is Delco (Division of General Motors).
Source code 257 covers Allegretti & Co and Paramount, who continued the Delco models for Sears.

Welcome to GG!

Good to know.

BTW - what's your source?

OWWM.org? by any chance?
I am a Blockhead, Man! http://tinyurl.com/CM-Block-Grinders-Why-the-Fuss

"I got to show the young boys how not to do it. I haven't showed them everything not to do, yet. It's a big job!" - Otto Kilcher

"Well, I don't wanna be a superman, I just wanna go somewhere, use my hands, and keep it simple. Oh real simple" - Keb' Mo'

Offline torqueman2002

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #37 on: August 13, 2012, 01:45:17 PM »
I found a site for motor capacitors while searching OWWM and recalled the recent discussion of Start Capacitors here.

http://tinyurl.com/Motor-Start-Capacitors
I am a Blockhead, Man! http://tinyurl.com/CM-Block-Grinders-Why-the-Fuss

"I got to show the young boys how not to do it. I haven't showed them everything not to do, yet. It's a big job!" - Otto Kilcher

"Well, I don't wanna be a superman, I just wanna go somewhere, use my hands, and keep it simple. Oh real simple" - Keb' Mo'

Offline toolguybak

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #38 on: August 14, 2012, 07:15:50 AM »
For clarification:

Source code 115 is Packard Electric (Division of General Motors), which included Sunlight Electric Motors (and grinders) back in the 1930s.
Source code 397 is Delco (Division of General Motors).
Source code 257 covers Allegretti & Co and Paramount, who continued the Delco models for Sears.

Welcome to GG!

Good to know.

BTW - what's your source?

OWWM.org? by any chance?

Thanks!
My research.
Yes, you know me on OWWM as Brian Kachadurian.

Anyone know the difference in a "Commercial" labeled block grinder and non-Commercial ones?
General speaking, the commercial grinders are rated for industrial use and dual voltage.
The non-commercial grinders are usually single voltage 6" and some 7" for homeowner use.

Offline torqueman2002

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #39 on: August 14, 2012, 05:24:36 PM »
I found a thread on OWWM on how to check the windings of a Split Phase grinder.

See the last post:
http://www.owwm.org/viewtopic.php?f=1&t=81679
I am a Blockhead, Man! http://tinyurl.com/CM-Block-Grinders-Why-the-Fuss

"I got to show the young boys how not to do it. I haven't showed them everything not to do, yet. It's a big job!" - Otto Kilcher

"Well, I don't wanna be a superman, I just wanna go somewhere, use my hands, and keep it simple. Oh real simple" - Keb' Mo'

Offline toolguybak

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #40 on: August 15, 2012, 05:14:56 PM »
The Packard Electric grinders (115) have the centrifugal starting switch on the rotor, like their regular motors.
The centrifugal switch is a pair of weights connected by springs, that slide an actuating sleeve.
The actuating sleeve engages or disengages a contact ring mounted on the end bell for the start windings, based on rpm.

The Delco grinders (397) and subsequent 257s have a starting relay instead.

I believe all of the 6" grinders were split-phase.
Some of the 7"x¾" grinders were split-phase.
Almost everything else was capacitor start.

Offline torqueman2002

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #41 on: August 16, 2012, 12:35:34 PM »
Here are OWWM threads on motor capacitors, Pulleys and Belts.

Motor capacitor help needed
http://owwm.org/viewtopic.php?f=1&t=64032&p=511674&hilit=+capacitor#p511674

Poached a grinder across state lines
http://owwm.org/viewtopic.php?f=1&t=77190&start=15

Pulleys and Belts
http://www.gizmology.net/pulleysbelts.htm

Aug 17, 2012 - Added link to Single phase motor diagnostic 101 and schematics - 1Ø Split Phase Motors
http://owwm.org/viewtopic.php?f=1&t=69608
http://www.electrical-contractor.net/forums/ubbthreads.php/forums/15/3/Technical_Reference_Area.html

Aug 18, 2012 - Added links to Fluke site that can be helpful with diagnosing motors & capacitors.
Trouble shooting single-phase motors & capacitors
http://support.fluke.com/find-sales/Download/Asset/2105247_A_w.pdf

Trouble shooting 3Ø motors
http://support.fluke.com/find-sales/download/asset/2105201_a_w.pdf

Aug 20, 2012 - Added link to buffing supply site:
http://owwm.org/viewtopic.php?f=1&t=59108&start=15
« Last Edit: August 21, 2012, 12:29:06 PM by torqueman2002 »
I am a Blockhead, Man! http://tinyurl.com/CM-Block-Grinders-Why-the-Fuss

"I got to show the young boys how not to do it. I haven't showed them everything not to do, yet. It's a big job!" - Otto Kilcher

"Well, I don't wanna be a superman, I just wanna go somewhere, use my hands, and keep it simple. Oh real simple" - Keb' Mo'

Online goodfellow

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #42 on: August 20, 2012, 10:50:16 PM »
GREAT detective work Tourqueman2002!! some good info there

Offline torqueman2002

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #43 on: August 21, 2012, 12:31:44 PM »
GREAT detective work Tourqueman2002!! some good info there
Thank you.

Keeping busy reading about what can help with restoring OWWM & OMWM.

I thought others may find these resources useful.   coffeex
I am a Blockhead, Man! http://tinyurl.com/CM-Block-Grinders-Why-the-Fuss

"I got to show the young boys how not to do it. I haven't showed them everything not to do, yet. It's a big job!" - Otto Kilcher

"Well, I don't wanna be a superman, I just wanna go somewhere, use my hands, and keep it simple. Oh real simple" - Keb' Mo'

Offline badgcoupe

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Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #44 on: September 27, 2012, 02:19:02 PM »
Hey everyone, new guy here. Found this amazing post after google searching about a Craftsman grinder I just won at auction.

Here are a few pics, it looks pretty beat up but I'm definitely excited to restore it, going to be a fun garage project!

Can anyone tell me a little bit more about it? More specifically how old it is?

http://www.westauction.com/auction/808/item/48688





And what the heck is this thing:


Thanks all! Look forward to contributing to the community.

The Garage Gazette

Re: Vintage Craftsman "Block Motor" bench grinder info -
« Reply #44 on: September 27, 2012, 02:19:02 PM »

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