Jump to content


Photo

Tiles tear off please help

  • Please log in to reply
9 replies to this topic

#1 Rockâ„¢

Rockâ„¢

    Sputnik

  • -----
  • Posts: 27
  • Joined: 18 Mar 2012

Posted 08 January 2013 - 06:04 AM

Hi 2 hours ago i was grinding my 8" F6 mirror, process was going fine then suddenly my son show me that 4 tiles are wearing off and red color brick like material is coming out behind the smooth face of tiles. It looks to me that smooth face of tiles is wearing n tearing off.
This is very looking like bricks. I am using ceramics tiles.

Coach me friend, what should i do now and my camera is also damaged otherwise i shows u all the image.

#2 planet earth

planet earth

    Surveyor 1

  • ****-
  • Posts: 1627
  • Joined: 07 Sep 2010
  • Loc: Ontario Canada

Posted 08 January 2013 - 06:15 AM

I believe you are using the wrong type of tiles.
Porcelain tiles are ther ones that you want or unglazed ceramic.
Willman Bell sells a sq ft for $9.00
Sam

#3 dave brock

dave brock

    Viking 1

  • -----
  • Posts: 609
  • Joined: 06 Jun 2008
  • Loc: Hamilton, New Zealand

Posted 08 January 2013 - 07:09 AM

I don't think you need to worry if the surface is just grinding off, that's normal. I've used tiles like that many times without problems.

Dave

#4 planet earth

planet earth

    Surveyor 1

  • ****-
  • Posts: 1627
  • Joined: 07 Sep 2010
  • Loc: Ontario Canada

Posted 08 January 2013 - 11:33 AM

I don't think you need to worry if the surface is just grinding off, that's normal. I've used tiles like that many times without problems.
Dave


I found that some cheaper glazed tiles use a soft ceramic, but yes if you wear off the glaze and ceramic is good quality they are fine.I like the Willman Bell unglazed tiles at $9.00 a sq ft.

Sam

#5 mark cowan

mark cowan

    Vendor (Veritas Optics)

  • *****
  • Vendors
  • Posts: 3987
  • Joined: 03 Jun 2005
  • Loc: salem, OR

Posted 08 January 2013 - 03:10 PM

You have glazed clay tiles and once the glazing wears off they don't really work, sadly, as the brick-like stuff isn't hard enough. :( You want ceramic tiles which are essentially glazed all the way through.

Best,
Mark

#6 dave brock

dave brock

    Viking 1

  • -----
  • Posts: 609
  • Joined: 06 Jun 2008
  • Loc: Hamilton, New Zealand

Posted 08 January 2013 - 03:19 PM

Hi Sam and Mark.
Rock says he is using ceramic tiles so I've taken him at his word. The ones I use have a glazing on the surface which wears off but under that is still very hard and I've had no problem with chipping, scratching etc.

Dave

#7 mark cowan

mark cowan

    Vendor (Veritas Optics)

  • *****
  • Vendors
  • Posts: 3987
  • Joined: 03 Jun 2005
  • Loc: salem, OR

Posted 09 January 2013 - 12:04 AM

I only said he has glazed tiles because I tried some many years ago and had exactly that experience - once the glaze wore through they were useless.

Best,
Mark

#8 MKV

MKV

    Vanguard

  • *****
  • Posts: 2486
  • Joined: 20 Jan 2011

Posted 09 January 2013 - 02:35 AM

Rock, try using glass tiles like these. It's best to use clear ones. They also come preattached so they handle like one a sheet, and can be cut to size and epoxied at once. You can buy then in home improvement stores.

Or, as someone already mentioned, buy Willmann-Bell's solid ceramic hex tile. They are very affordable.

Mladen

#9 Rockâ„¢

Rockâ„¢

    Sputnik

  • -----
  • Posts: 27
  • Joined: 18 Mar 2012

Posted 09 January 2013 - 03:58 AM

Thanks will try this one out

#10 Pinbout

Pinbout

    Cosmos

  • *****
  • Posts: 7545
  • Joined: 22 Feb 2010
  • Loc: nj

Posted 09 January 2013 - 09:10 AM

but pennies are the cheapest and work really well, and I get less severe zones with them, but I'm spin grinding...

Posted Image






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics