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Tool to enlarge drill hole?

Discussion in 'Tools and Materials' started by BathDIY, 11 Nov 2018.

  1. BathDIY

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    Is there a tool to enlarge a drill hole in masonry?

    The holes are not level and I need to get them level to insert an oak beam (with metal brackets already fitted by a third party).

    I am guessing that forcing it with a drill bit is not ideal and potentially dangerous.
     
  2. pete50

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    I think a picture would be helpful. I'm envisaging a series of holes drilled in a wonky line that you want to put an oak beam into. Now I know that cannot be possible but that is the mental picture that your post conjures up.
     
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  3. Burnerman

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    You can enlarge the existing hole by using a larger size masonry bit- it may get you somewhere but it really depends on how far the bracket is out.
    A pic would help us further to advise you!
    John :)
     
  4. footprints

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    Depends how far out you can put a plug and screw in the hole and then drill right alongside of it.
    Otherwise drill a wooden template and fix one screw and drill through the one you want to enlarge.
     
  5. BathDIY

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    The holes are drilled at an angle into the wall so the beam doesn't sit flush (see attached). The gap you can see at the bottom is 10 mm out from the wall.

    The metal pins (2 of them) are set in the oak beam.
     

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  6. big-all

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    why not get a stepped cutter
    or work a drill to enlarge the hole in the back off the beam avoiding the front say 20mm to allow the bolts to pull the beam flat
     
  7. SammyInnit

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    Use the same drill bit as you would a reamer bit. Back in the hole and pull the drill down until the material is worn away enough to result in a square hole. When you remount do it with some filler, epoxy probably the best.
     
  8. foxhole

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    Are you sure surface is vertical?
     
  9. BathDIY

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    Yes it's vertical.
     
  10. catlad

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    You could pack it to your desired angle and then squirt
    expanding foam in the gap at the bottom.
     
  11. SammyInnit

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    [​IMG]
     
  12. catlad

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    Come on then tell me why not? its what expanding
    polyurethane was invented for!
     
  13. SammyInnit

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    Sooner use expoy resin fix. Neater, stronger bond, sets quicker, little chance of a can exploding, easy to control.

    Expanding foam is just messy and in a finished/second fix setting I wouldn't dream of bringing it into someones house unless there was absolutely no other alternative.
     
  14. EddieM

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    I have to agree, that would be a terrible bodge. :(
     
  15. catlad

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    I can only assume you are not aware of what
    polyurethane is capable of then, and I don't mean pulling the trigger until there is a
    big mess!
     
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