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-   -   Inexpensive occasional use bench grinder? (http://forums.pelicanparts.com/off-topic-discussions/1177363-inexpensive-occasional-use-bench-grinder.html)

A930Rocket 05-05-2025 06:56 PM

My Craftsman bench grinder is at least 40 years old. I keep the stone on the right side all the time, but interchange a wire wheel or buffing wheel on the left side.

Which reminds me, lately when I turn it on, there’s a humming noise. Then the breaker trips. I have to turn it on for a few seconds and let the RPMs build up. Then turn it off. Turn on. Turn off. Repeat until the max RPMs are running and it’s all good.

Would that be some kind of solenoid or ???

908/930 05-06-2025 08:18 AM

Quote:

Originally Posted by A930Rocket (Post 12459653)
My Craftsman bench grinder is at least 40 years old. I keep the stone on the right side all the time, but interchange a wire wheel or buffing wheel on the left side.

Which reminds me, lately when I turn it on, there’s a humming noise. Then the breaker trips. I have to turn it on for a few seconds and let the RPMs build up. Then turn it off. Turn on. Turn off. Repeat until the max RPMs are running and it’s all good.

Would that be some kind of solenoid or ???

Is there a capacitor sitting somewhere on that motor, possibly under the base? Try changing that. When removing them keep in mind capacitors can hold charge for a while.

wdfifteen 05-06-2025 08:20 AM

Be patient and find an old Craftsman on Craig's list or FB marketing. Save money, get a better machine. The old Craftsman square grinders have quite a cult following. People restore them like they were old cars.

Tim Hancock 05-06-2025 08:40 AM

Quote:

Originally Posted by Rot 911 (Post 12459497)
Since I got a Bauer harbor freight cordless angle grinder and 4 inch flap discs I don’t remember the last time I’ve used my grinder. It’s a lot easier to sharpen mower blades, chisels, etc. by putting them in my vice and using the flap discs. And those discs are cheap and seem to last forever.

I do the same for my mower blades. I have (2) 60" three bladed ganged finish mowers, one 60" zero turn and one 72" three bladed PTO finish mower.... Much quicker using a coarse grit flap disk to quickly hog off a bunch of dull edge from hitting dirt clogs on the edge of the runway and the occasional rock protruding from the edge of our pond. ;):)

I have one old bench grinder that with a fine green stone on one side for sharpening carbide lathe bits and a fine regular wheel on the other side. I have one 15 or so year old cheap Harbor Freight bench grinder with a coarse wheel on one side and a wire brush on the other. The Harbor Freight unit has very little power if one pushes hard, but it works good enough for me. I also have a Harbor Freight bench unit with extended shafts made for buffing. It works great on the rare occasion I use it.

wdfifteen 05-06-2025 08:50 AM

Quote:

Originally Posted by Rot 911 (Post 12459497)
Since I got a Bauer harbor freight cordless angle grinder and 4 inch flap discs I don’t remember the last time I’ve used my grinder. It’s a lot easier to sharpen mower blades, chisels, etc. by putting them in my vice and using the flap discs. And those discs are cheap and seem to last forever.

I've thought of doing that. The only thing holding me back is that neither of my bench vises are in a place where I can throw a lot of sparks.

You sharpen chisels this way??

Tim Hancock 05-06-2025 08:58 AM

Quote:

Originally Posted by wdfifteen (Post 12459896)
I've thought of doing that. The only thing holding me back is that neither of my bench vises are in a place where I can throw a lot of sparks.

You sharpen chisels this way??

Just c -clamp it to a saw horse or something and do it outside. I do stuff like that all the time when I need to cut or grind metal to avoid stinking up the shop or having to clean up the metal dust.

masraum 05-06-2025 10:30 AM

Lots of good info, folks. Thanks

911 Rod 05-06-2025 10:38 AM

1 of 2 of my Craftsman block grinders. Paid $75.00 for it.

http://forums.pelicanparts.com/uploa...1746556657.jpg

aschen 05-06-2025 10:43 AM

I was thinking about trying to use my angle grinder or a manual file to sharpen my lawnmower blade a few weeks ago, since I don't have a bench grinder.

However 24$ delivered the next day for a new blade from amazon was my chosen approach. I have the disposable world we live in but here I am. Last blade went about 3 years.

masraum 05-06-2025 10:55 AM

Quote:

Originally Posted by aschen (Post 12459957)
I was thinking about trying to use my angle grinder or a manual file to sharpen my lawnmower blade a few weeks ago, since I don't have a bench grinder.

However 24$ delivered the next day for a new blade from amazon was my chosen approach. I have the disposable world we live in but here I am. Last blade went about 3 years.

I need to sharpen the blades at least every 2-3 mowings.

herr_oberst 05-06-2025 10:58 AM

Quote:

Originally Posted by 911 Rod (Post 12459953)
1 of 2 of my Craftsman block grinders. Paid $75.00 for it.

I like the beefy tool rests on that one. Mine has the chintzy stamped rests. The data plate is completely faded out, too. I can't remember what I gave for it.



http://forums.pelicanparts.com/uploa...1746557842.jpg

911 Rod 05-06-2025 11:00 AM

Quote:

Originally Posted by herr_oberst (Post 12459969)
I like the beefy tool rests on that one. Mine has the chintzy stamped rests. The data plate is completely faded out, too. I can't remember what I gave for it.
]

I made the tool rests.

herr_oberst 05-06-2025 11:04 AM

Quote:

Originally Posted by 911 Rod (Post 12459971)
I made the tool rests.

Nice! I have a new project!!

masraum 05-06-2025 11:04 AM

Quote:

Originally Posted by 911 Rod (Post 12459971)
I made the tool rests.

I'll even bet you did some grinding on them! :D

911 Rod 05-06-2025 11:12 AM

Quote:

Originally Posted by masraum (Post 12459975)
I'll even bet you did some grinding on them! :D

I did! And the first time I used the rests I put scratches in them. Oh well.

masraum 05-06-2025 11:21 AM

Quote:

Originally Posted by 911 Rod (Post 12459980)
I did! And the first time I used the rests I put scratches in them. Oh well.


You could get a buffing pad for one side and polish them to a mirror finish!

cabmandone 05-06-2025 12:04 PM

Quote:

Originally Posted by masraum (Post 12459966)
I need to sharpen the blades at least every 2-3 mowings.

What in the samhell are you mowing?? You know you're not supposed to mow rocks right? I sharpen mine in the spring and then swap them out for my other pair about mid summer. Come spring, I sharpen both sets. I also have a "beater" set that I use if I'm going to mow a lane along a ditch or something like that.

masraum 05-06-2025 04:13 PM

Quote:

Originally Posted by cabmandone (Post 12460019)
What in the samhell are you mowing?? You know you're not supposed to mow rocks right? I sharpen mine in the spring and then swap them out for my other pair about mid summer. Come spring, I sharpen both sets. I also have a "beater" set that I use if I'm going to mow a lane along a ditch or something like that.

The wife does it, and she does it like she's driving a tank. Our property is not flat and has lots of rocks, sticks, etc... Only about 1 acre is "yard" while the rest is pretty wild. I try to keep the "WTF are you doing?!?" speeches to a minimum. It's better for me if she does something and has to come to me to fix it later.

LWJ 05-06-2025 04:22 PM

A note. My generic POS looks just like the Craftsman above. I paid $10 or so at a garage sale.

Deals are there. Patience.

A930Rocket 05-06-2025 06:00 PM

Quote:

Originally Posted by 908/930 (Post 12459871)
Is there a capacitor sitting somewhere on that motor, possibly under the base? Try changing that. When removing them keep in mind capacitors can hold charge for a while.

Nothing under the base, so I’ll have to open it up to take a look. It all started, after it fell off my folding work platform.

Mine looks like this and I’m thinking it’s from late 80s or early 90s. I bought it new.

http://forums.pelicanparts.com/uploa...1746584411.jpg


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