Welcome To Signs101.com: Largest Forum for Signmaking Professionals

Signs101.com: Largest Forum for Signmaking Professionals is the LARGEST online community & discussion forum for professional sign-makers and graphic designers.

 


  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Mounting Gemini letters on granite

Discussion in 'General Signmaking Topics' started by michsanford, Jan 24, 2014.

  1. michsanford

    michsanford Member

    332
    1
    18
    Oct 18, 2009
    Gastonia, NC
    Any suggestions on drilling into a granite wall to mount Gemini letters? We need a 3/16 hole, but about 200 of them.

    Thanks!
     
    Tags:
  2. Billct2

    Billct2 Major Contributor

    7,459
    640
    113
    Mar 12, 2005
    New England
    What kind of granite wall, interior , exterior, smooth, rough...what material letters, how big?
     
  3. michsanford

    michsanford Member

    332
    1
    18
    Oct 18, 2009
    Gastonia, NC
    It's an exterior wall, rough surface.

    they are plastic formed letters, varying in size around 18"
     
  4. J Hill Designs

    J Hill Designs Major Contributor

    15,549
    16
    0
    Sep 24, 2004
    SDS+ hammer drill
     
  5. Billct2

    Billct2 Major Contributor

    7,459
    640
    113
    Mar 12, 2005
    New England
    Yep, I agree. Careful not to crack it.....
     
  6. Moze

    Moze Precision Sign Services

    2,032
    156
    63
    Feb 27, 2012
    Dallas, TX
    I third that. SDS rotary hammer. NOT a hammer drill. If you don't have an SDS, now's the time to invest in one.
     
  7. BobCap

    BobCap Member

    186
    0
    16
    Jan 12, 2009
    Gilobert, MN
    Drill 200 holes...it'll take you a month. I hope you are charging enough...

    I would use 3M VHB tape. If it's good enough to hold trim on your car...

    Or some other kind of adhesive.

    Bob Cap
    AAI
    Gilbert N
     
  8. Mosh

    Mosh Major Contributor

    5,809
    41
    48
    Oct 19, 2009
    Nerbaska
    VHB or Silicone. No way I would drill into that, too much risk of cracking it.
     
  9. Jester1167

    Jester1167 Very Active Member

    Sometimes it is more accurate to start with a smaller bit on textured walls. The larger bits tend to walk more when starting the holes. Also bring a larger" bit for the few misaligned holes that won't allow the letter to sit flush.

    If you have a leaf blower, bring it. They work good for blowing off the wall and the holes out before installing the letters.
     
  10. TammieH

    TammieH Very Active Member

    1,084
    67
    48
    Nov 28, 2011
    Pacific NW

    or rent one for around $20 a day, more or less depending where you live
     
  11. letterman7

    letterman7 Very Active Member

    1,258
    83
    48
    Nov 10, 2008
    Pennsylvania
    Ok, I'll ask: what's the difference between the DeWalt SDS and the "regular" DeWalt "hammer drill"? They look nearly identical to me except for the switch on the side of the SDS (of course, I have an ancient hammer drill here).
     
  12. Moze

    Moze Precision Sign Services

    2,032
    156
    63
    Feb 27, 2012
    Dallas, TX
    It'll take about 2 hours.

    How exactly would you go about mounting a (edit: an 18") formed plastic letter with VHB and silicone?
     
  13. Moze

    Moze Precision Sign Services

    2,032
    156
    63
    Feb 27, 2012
    Dallas, TX

    An SDS rotary hammer delivers a lot more impact energy than a hammer drill.
     
  14. Jester1167

    Jester1167 Very Active Member

    I wouldn't think he would need to worry about chips, the wall is textured and the strokes on the 18" letters will cover up any small chips.
     
  15. Billct2

    Billct2 Major Contributor

    7,459
    640
    113
    Mar 12, 2005
    New England
    That's why I asked for deatils, if it was aion interior wall, flat & polished I'd do VHB & silicone. Exterior flat, maybe a short stud with pad/silicone. Exterior roughgranite you gotta drill baby drill. And I agree it's a good idea start with a pilot hole.
     
  16. letterman7

    letterman7 Very Active Member

    1,258
    83
    48
    Nov 10, 2008
    Pennsylvania
    Ah, ok, thanks for that. I would think that an SDS would have more chance of cracking the granite than a standard hammer drill, no?
     
  17. J Hill Designs

    J Hill Designs Major Contributor

    15,549
    16
    0
    Sep 24, 2004
    Id say no. SDS+ will eat through granite like butter
     
  18. Moze

    Moze Precision Sign Services

    2,032
    156
    63
    Feb 27, 2012
    Dallas, TX
    Granite doesn't tend to crack. It WILL break out on the back when the bit punches through if the granite isn't adhered to a backer, but since this is an outside wall, that shouldn't be an issue.

    42 holes, no cracks, just break-out. Skip to 4:50 to see what it does to the back.

    [video=youtube;HhBdm3WeUC4]https://www.youtube.com/watch?v=HhBdm3WeUC4[/video]
     
Loading...

Share This Page

 


Loading...