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Shelf Grinding


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#1 Biglou13

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Posted 20 July 2014 - 06:25 PM

What tools do you use ?

Links would be great.

Pics and or,video would be great also.

Was thinking about diamond pads from toolcity.?
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#2 Marcia Selsor

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Posted 20 July 2014 - 08:25 PM

For small things I use a dremel with a grinding wheel. For larger I use a Makita 4" angle grinner with a grinding wheel.

Put the shelves on a bag of clay to absorb shock. I use a chisel with knuckle protector for small drips.

 

 

Marcia



#3 Benzine

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Posted 20 July 2014 - 08:25 PM

If you are referring to cleaning, as in getting rid of old kiln wash and glaze, this is what I use:

 

https://www.continen...b_categoryID=61

 

For the really large drips, they usually just come right off by hand, due to my excellent kiln washing..., and if not, I use a flat heat screw driver to pop them off.


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#4 bciskepottery

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Posted 20 July 2014 - 08:46 PM

Would you like eggs and toast with your links?

Would not recommend the diamond pads . . . you'll eat through a ton of them. We just cleaned 21 shelves from a salt firing . . . used carbide grinding stones, stiff putty knives, chisel with hand protector; so serious glaze runs so the angle grinder stayed at the workbench. For small glaze drops, a flat-headed screwdriver and hammer work. You just need to learn how to angle the knife/screwdriver/chisel so that you catch under the lip of the glaze bead. For bad glaze runs, grinder.

And, in all situations . . . wear your respirator, eye protection, and work gloves (no cheap cloth gloves); slivers of glaze can cause serious cuts. And never run your bare hand over the kiln shelf to see if there are any glaze spots that need removal.

#5 Biglou13

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Posted 20 July 2014 - 09:10 PM

Which grinding wheel?
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#6 JBaymore

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Posted 20 July 2014 - 10:13 PM

I use diamond on an angle grinder on silicon carbide and Advancers.

 

When they need a big going over.... take them to the sandblaster and say "me em' black again.  Simple.  No hazard.

 

best,

 

..................john


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#7 Mark C.

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Posted 20 July 2014 - 10:42 PM

I wrote a whole thread with photos on this  subject and covered my tools and grinders  and everyone chined it on thier ways-Just look it up

I did not do any videos sorry

I would like my toast firm and eggs cooked well.

Mark


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#8 Biglou13

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Posted 21 July 2014 - 05:33 AM

Well the group studio I'm at has some, poorly old kiln was shelves

For the ones old crusty flaking kiln wash, Is it necessary to grind it all off , to the shelf. Or just smooth?

Some shelves are chipped, is there a need to try and fill these chips?

Yes mark saw that post. No bacon with breakfast?

For,non diamond grinding is this what you all are using?

http://t.harborfreig...www.google.com/

There is this one shelf out back that has a whole cup,still attached, it looks like it's been there for years. I really want to get that off without killing the shelf.
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#9 Marcia Selsor

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Posted 21 July 2014 - 07:03 AM

I got a pack of three diamond grinding wheels  off ebay a few years ago. Still on the first one. It was a great price.

 

Marcia



#10 drmyrtle

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Posted 21 July 2014 - 08:51 AM

I use diamond on an angle grinder on silicon carbide and Advancers.
 
When they need a big going over.... take them to the sandblaster and say "me em' black again.  Simple.  No hazard.
 
best,
 
..................john


Waaaait a minute. I thought advancer and silica carbide didn't gunk up with glaze. Are you grinding from ash firing?

#11 Benzine

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Posted 21 July 2014 - 09:49 AM

There is this one shelf out back that has a whole cup,still attached, it looks like it's been there for years. I really want to get that off without killing the shelf.

 

Hahahahaha!....  You should take a picture of that, and post it in the studio with the caption, "Don't Forget to Claim Your Work".

 

I approach applying kiln wash, the same way I approach painting the exterior woodwork on my house; scrap any of the loose bits off, anything that doesn't come off with a thorough scrapping, won't cause any issues.

You don't need to fill in the chips, just coat them, as you do with the rest of the shelves.


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#12 JBaymore

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Posted 21 July 2014 - 09:55 AM

 

I use diamond on an angle grinder on silicon carbide and Advancers.

When they need a big going over.... take them to the sandblaster and say "me em' black again. Simple. No hazard.

best,

..................john


Waaaait a minute. I thought advancer and silica carbide didn't gunk up with glaze. Are you grinding from ash firing?

 

Yes....... I fire a noborigama. Regular silicon carbide does "gunk up".

 

And for the Advancers....... most of the time I just use a putty knife to flick off stuff.....not much stuicks (but for about $250 a shelf... they should even stack themselves). My point was that I am not using diamond on clay ar alumina shelves.... hard to not eat a hole in thiose instantly. But sometimes the kiln wash builds up and gets uneven more than I like. And I DON'T like getting exposed to repeatedly fired stuff that contains microcrystalline silica in the cristobalite form (fired kiln wash)... hence the sandblaster comment.

 

repeatedly fired kiln was dust.... BAD stuff.

 

best,

 

.......................john


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Professor of Ceramics; New Hampshire Insitute of Art

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#13 Mark C.

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Posted 21 July 2014 - 10:10 AM

I use two tools

From graiger a silicon grinding CUP it large and does heavy duty work on a 9 or 7 inch milwakee grinder threaded shaft

this is for silicon and dry pressed high alumina shelves

98% of the time I use a makita 4 inch grinder with masonary wheels from harbor frieght sold in 10 packs-I also us a diamond wheel like the one you show but it will eat shelve fast so I am very carfull; with it

This  small 4 inch grinder tool is easy to hold

I have one hanging next to car kiln

My advancer shelves rarely need any grinding

I mostly grins my salt shelves but even those need little as dry pressed high alumina does not attract salt.

Mark


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#14 Benzine

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Posted 21 July 2014 - 11:22 AM

 

 

best,

 

.......................john

 

 

They don't?!!!

 

I figured it was like something out of Harry Potter; flick your wrist, and the shelves float into the kiln to load, and once done firing, another flick of the wrist and they put themselves away.  Pffff, so much for the "Advance" portion of the name...


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#15 schmism

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Posted 21 July 2014 - 12:22 PM

4" diamond cup wheel  (suitable for standard 4.5" hand held grinder)

 

http://www.homedepot...AWD40/202884364

 

or just the standard 4" diamond cuttoff wheel for the grinder.  This one will leave u shaped divots if you are to aggressive with it

http://www.homedepot...4003Q/100140124

 

they also make small 1" versions for your dremel if you need to blend drips off the bottom of your glazed pots/bowls etc.



#16 Mark C.

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Posted 21 July 2014 - 02:52 PM

Lou I do have some video of grizzley bears eating salmon from our Alaska trip last week if this helps.

Its a bit off topic but heck most threads drift far from the nest anyway.

Mark


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#17 Biglou13

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Posted 21 July 2014 - 07:54 PM

I'd love to see that.
Not to mention that some here uses fish in his designs.
And the outdoors are great for creative inspiration
And some fresh salmon would be amazing right now, smoked salmon!, gravlax, salmon sushi, sashimi, ........lucky bears!!!
There is prolly some granite content in rocks, which means there prolly is some feldspar in video also. not to mention silica,

It's video source of glaze material.
Caution big brother is watching.
The beige is blinding!!!!!!
The middle of the road is boring

The true sign of intelligence is not knowledge but imagination.
-Albert Einstein

#18 Biglou13

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Posted 30 July 2014 - 01:35 PM

1st grinding session done!

Bought this.

http://t.harborfreig...nder-91222.html

And this

http://www.toolocity...?productId=2003

The old wash and drips big and small came off like butter

Less than 2 minutes per shelf,

I did eat through 100 grit pad, maybe a bit overkill I may try a different pad next time, or maybe lower grit. And or the stone that came with grinder.

It took longer for me to set up and break down than grinding 5 22" shelves

It wasn't the chore everyone groans about.
Caution big brother is watching.
The beige is blinding!!!!!!
The middle of the road is boring

The true sign of intelligence is not knowledge but imagination.
-Albert Einstein

#19 JBaymore

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Posted 30 July 2014 - 01:39 PM

It wasn't the chore everyone groans about.

 

Try 60-80 shelves at a time between woodfirings.  ;)

 

best,

 

...............john


John Baymore
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Professor of Ceramics; New Hampshire Insitute of Art

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#20 Biglou13

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Posted 30 July 2014 - 01:50 PM

Do you grind between every firing?
Do you kiln wash for woodfiring?

60-80
(Isn't that why you have students)
I'd invest in a sandblaster

Maybe I'll just continue to pay to have my work fired.

Nah I still want my own....
Caution big brother is watching.
The beige is blinding!!!!!!
The middle of the road is boring

The true sign of intelligence is not knowledge but imagination.
-Albert Einstein




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