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Articles

How To Effectively Dry Drill In Reinforced Concrete

Successful Dry Drilling Of Reinforced Concrete

Wet or Dry? Before you begin, you must consider and choose.

Wet: more economical. The bits cost less and last longer.
Less vibration = less chance of bit damage.
Check out our Wet Drilling Motor Products

Dry: should be reserved for situations when water is absolutely not allowed, or situations where water would be exceedingly inconvenient, such as overhead drilling, sub zero temperatures, etc.
Check out our Dry Drilling Motor Products

Dry Drilling May Not Be Possible In Some Situations

  1. Heavily reinforced concrete with rebar larger than 20mm
  2. Heavily reinforced concrete with steel plates, etc.
  3. Diameters larger than 162mm

The Essential Elements Of Successful Dry Drilling Of Reinforced Concrete:

  1. The correct type of bit which is sharp
  2. A skilled operator
  3. A good quality, stable drill stand
  4. The right drilling motor and vacuum cleaner

If any one of the above 4 elements is not 100%, then the drilling operation is likely to fail.

Drilling Advice

  1. Don’t let the segments overheat. Drill in stages of about 60 seconds then ease up to allow the dust to escape and the segments to cool.
  2. Don’t use overly heavy down force. Allow the tool to do the work at its own pace
  3. But, if progress slows, this is a sign that the bit is going dull: STOP and sharpen the bit
  4. If the LED load indicator is glowing red, that is a sign that the bit is going dull: STOP and sharpen the bit.
  5. If there is extreme vibration: STOP and find the cause. You may need to tighten the drill stand.
  6. Don’t use overly heavy down force. Allow the tool to do the work at its own pace
  7. But, if progress slows, this is a sign that the bit is going dull: STOP and sharpen the bit
  8. If the LED load indicator is glowing red, that is a sign that the bit is going dull: STOP and sharpen the bit.
  9. If there is extreme vibration: STOP and find the cause. You may need to tighten the drill stand.

Note:

We do not recommend dry drilling of reinforced concrete hand-held. It will be more dangerous, vibration exposure must be limited to 10 minutes, it will take longer, and the bit will wear more. If you must drill handheld, the diameter must not exceed 82mm and the time must be limited to 10 minutes due to hand arm vibration exposure limits.

You can find more details about AGP DM62 drilling motor specially made for drilling in reinforced concrete here: DM62


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