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Sears Craftsman Bench Grinder - any worth?

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RoninB4

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Think I’m going to pick these up tomorrow - should do the trick for the rubber feet?
-Maybe but not a guarantee. The perceived vibration is a relative description, there's going to be some with a bench grinder that's not mounted. The mass of the grinder has a lot to do with absorbing vibration, yours doesn't look like it has much mass. Have you put an indicator on the shafts to determine if they run true? IF the bearings are good then how well the wheels are balanced has a lot to do with the vibration. Many types of grinders (surface grinders, pedestal type tool grinders, tool/cutter grinders, etc,) have very little perceived vibration. Bench grinders all have some vibration present because of the lack of mass. If your grinder is bouncing on the bench then that's excessive. The less mass the greater the need to use anti-vibration measures.

-For rough grinding more vibration is acceptable, for fine grinding (cutting edges) then it becomes more important. Vibration and improved surface finish can be accomplished. How important is this to you for what you're doing? Try the rubber feet and report back.
 
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larry4406

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The original rubber feet look like this
1787306002445.png

Lowes has ones that are near identical. I can't find the part number at the moment.

This style is what you want for a craftsman block grinder.
The clone rubber grommets at Lowe’s are made by Hillman. Pictures of package and grommet from my stash.

These are in the hardware section in the various drawer bins.

Exact as far as I can tell. Learned about it on this site.


IMG_1691.jpegIMG_1692.jpeg
 
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freebo86

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Well I picked up the $2.99$ stuff and cut the head as a slot and surprisingly they fit well, lol.

Here is a video of the machine running. The wheels look out of round, I do see a wobble. I did the ring test on the wheels and they’re good.

Thoughts? Is this excessive?
Garage floor test

Bench test


IMG_1676.jpeg
 

1982fxr

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The right side looks to have an issue.

But, overall, the machine is not walking, which is good. I'd check for runout on the shaft.

You could also swap sides and see if the problem follows it.
 

RoninB4

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Thoughts?
-It does "walk" when it's slowing down, that does suggest an problem that could be attended to.

-Did you put an indicator on both shafts to check for runout (power off and unplugged).
Is this excessive?
-For some it's tasks it's ok, for grinding woodworking tools with a sharp edge.....no. You can attempt to balance the wheels (off the grinder spindle), then dress them accordingly. There are also better elastomers and mounting the grinder that should help but it's really about what the task is and how much effort returns the result you want/need. It doesn't look horrible but it could probably be better. This is a bench grinder and, like everything else, there's a point of diminishing returns that only you can decide. Test and post results.
 
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