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8" Grinder & Wobble

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Forum topic by lighthearted posted 04-25-2010 03:21 AM 959 views 0 times favorited 4 replies Add to Favorites Watch
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lighthearted

142 posts in 2775 days


04-25-2010 03:21 AM

Topic tags/keywords: grinder sharpening turning

Hi All-
I just bought a 8” Porter Cable Grinder:
http://www.lowes.com/pd_80500-46069-PCB575BG_0_?productId=3162497&Ntt=grinder&Ntk=i_products&pl=1&currentURL=/pl__0__s?newSearch=true$Ntt=grinder$y=0$x=0
I am looking to sharpen my chisels and we are just starting to get into turning. I read a lot of posts in the forums that recommended the 8” over the 6” but now that I have one I am not so sure that was the right choice—thoughts?

Also—the wheel seems to wobble! mostly when it is off and winding down, but that doesn’t seem right. Should I be taking this back to lowes?

Thanks!

-- Chris http://thelightheartedwoodworker.com/


4 replies so far

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Michael Murphy

452 posts in 2466 days


#1 posted 04-25-2010 03:40 AM

Check for tightness and/or uneven surfaces, like labels on the wheels folded over, stuff like that.

It should not wobble at all, starting, stopping, running. Might be a bent shaft? Take it back and get another, if it behaves the same, return it and try something else.

I have the PC slow speed whetstone and high speed grinder combo. It works fine, just don’t leave the whetstone immersed in water, drain the tray and fill it when you need it. I rigged up a little pump circulating system, but overall I like the way it works.

-- Michael Murphy, Woodland, CA.

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dbhost

5604 posts in 2693 days


#2 posted 04-25-2010 04:04 AM

How exactly do you mean wobble? Side to side or in / out like an out of round wheel?

I have a Ryobi 8” that was dead on with the stock wheels, but the Nortons were somewhat out of round. A wheel dresser fixed the problem right off.

If it is side to side, that can get scary. Check for tightness. Check the stone to see that the hole is straight through. Check the shaft for straightness. If the shaft is bent, take it back to Lowes, if the wheel is messed up, well you ought to grab some White Aluminum Oxide wheels anyway for sharpening, so no huge loss…

Michael Murphy hit it on the head though, it shouldn’t wobble, starting, stopping or running. It should be smooth as butter.

-- My workshop blog can be found at http://daves-workshop.blogspot.com

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lighthearted

142 posts in 2775 days


#3 posted 04-25-2010 04:13 AM

Wobble as in the axis is not centered on the wheels.
When I turn it off—and it slows down it shakes, the table shakes, the attached lamp shakes.

What are your thoughts on 6” vs 8”?

-- Chris http://thelightheartedwoodworker.com/

View Michael Murphy's profile

Michael Murphy

452 posts in 2466 days


#4 posted 04-25-2010 06:45 AM

Return it. You should not have vibrations like that in a machine of any kind.

-- Michael Murphy, Woodland, CA.

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