Down The Hole Drill Rods

Our high strength DTH Drill Pipe go the distance. API, BECO, Cubex, DIBH and other threads available.

Down The Hole (DTH) Drill Pipe

Select from our broad range of DTH drill rods and subs engineered for rough surface drilling applications. Harlsan Down the Hole rods are optimised for production efficiency. The drill rods incorporate design features to maximise durability and wear resistance; and the ease of make and break operations.

The engineering focus on extending drill rod life helps to lower the cost of production focused drill and blast programs. Drill rod life is further boosted with precision thread manufacturing and high quality high tensile steel construction.

Australia’s Toughest DTH Drill Rods


The Harlsan focus on product design and material quality makes for very tough and robust DTH rods. Drill rods highly matched for a broad range of mining and drilling assignments.

Our DTH products are assigned a unique product ID, allowing you to track your cost per metre drilled.

At Harlsan, it is our mission to continuously improve our products to continuously improve your ROI.

RC Drill Rods & Inner Tubes Specifications

Tool Joint Spanner Flats

Rods available with or without spanner flats. 2 or 4 flats as required.

Tool Joint Material

All Rods feature hardened European 4140 alloy steel tool joints.

DTH Rod Thread Types

The most common thread types we support:

  1. API Regular
  2. API Internal Flush (IF)
  3. API Full Hole
  4. DIBH
  5. Beco
  6. Cubex

Other thread types available upon request.

Robot Welding Technology

Independently tested & certified to exceed welding standard AS3992

Length & Size

Standard lengths from 1 to 6m, in diameters up to 127mm (5″).

Other sizes may be available upon request.

Australian Made Toughness

We use only the best quality materials to keep you drilling.

Down The Hole (DTH) Drill Pipe Ordering Information


From Africa through to Asia, Eastern Europe through to the UK, and Canada through to South America. We can supply you with robust and productive DTH drill rods.

For pricing, immediate supply or customised orders call us on +61 8 9021 1288.

Get your engineered drilling components and consumable items on time, on budget and on track with Harlsan’s manufacturing services. Call us now or request a quote.

Expert Assist


Nick Sattin

Location: Perth
Business Development Manager

Call Nick: +61 437 341 111
Email Nick:

Matt Bevan

Location: Kalgoorlie
Operations Manager

Call Matt: +61 409 089 040
Email Matt: