Spiral Flush Design

  1. Flushing channels are crosswise to the drilling direction.

  2. Back flush creates vacuum to the pilot bit face area.

  3. Air channels are above the ring bit cutting edge.

Sprial Flush design results in no pressure to the ground, no air leakages, and no over drilling so no threat to surrounding structures!

Conventional DTH Drilling

Conventional DTH Drilling has two problem areas:

  1. Pressurised air over drills material. Over drilling removes more material than anticipated changing the ground’s original characteristics threatening nearby structures.

  2. Air that is blown forward travels long distances in loose ground or soft clay. This can cause severe damages to nearby buildings & structures.


As a result, the use of conventional DTH drilling is limited already in several city centers, shorelines and other sensitive areas around the world.

Your Drilling Equipment


Opening Hours


 Monday - Friday:

8:00am - 4:00pm

Saturday: Closed

Sunday: Closed

      For urgent inquiries outside

of normal working hours

please contact:

Lance: 021 998 762 or

Glenn: 021 855 963 or

Christina: 021 619 366


Drill Connex Ltd -

Auckland Office & Warehouse

69 Creek Street



New Zealand 

Phone: 021 998 762 - Lance

Email: lance@drillconnex.co.nz 

Phone: 021 619 366 - Christina (Chris)

Email:  chris@drillconnex.co.nz 


Drill Connex Ltd - Katikati

Level 2, Building 2

Talisman Centre

15 Talisman Drive


New Zealand 

Phone: 021 855 963 - Glenn



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