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Setting bolt receiver into tarmac?

Hi...just had new gate put in. I need to set the bolt tubes into the ground to take drop bolts. The drive is tarmac....what is best way to get 20mm dia. holes 2-3 inches deep? Gate lads did 2 for closed gate..look neat. Do I get bi wide drill...or one of those circular cake cutter type things? thanks.

Comments

  • flashg67
    flashg67 Posts: 4,158 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    Personally I'd use what ever drill bits I had and 'ream' it out to size. You could buy a core cutter but they're quite expensive unless you'll use them again & you'll still have to remove the inner core that this leaves manually by chipping it out etc
  • phil24_7
    phil24_7 Posts: 1,535 Forumite
    Eighth Anniversary 1,000 Posts Combo Breaker
    I'd use a 20mm masonry bit in a hammer drill.
  • Norman_Castle
    Norman_Castle Posts: 11,871 Forumite
    Part of the Furniture 10,000 Posts Photogenic Name Dropper
    In tarmac can you just hammer them in?. If you've got a metal rod which is slightly under size hammering that in first might help.
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