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Top Hammer
Drilling Consumables

Rotary percussion drilling

Rotary percussion drilling can be divided into two categories. A top hammer and down the hole hammer.


Top Hammers Bits and Consumables

Top hammers are primarily used for drilling holes into formation for hole diameters usually up to 6” (152 mm). Top hammers use percussion, rotation, and feed force to drill a hole into the rock. A top hammer gets its name because it remains out of the hole on top of the drill string. The top hammer creates impacts by causing the to-and-fro movement of a piston contained within it. This high-impact energy created is transmitted from the top hammer to the rock via the shank adaptor, drill steel, and drill bit.


Scan Rock Traders (SRT) can source high-quality top hammer consumables i.e. drill rods, couplings, and drill bits. Our products have been tested in the harshest conditions and formations. They have given good results with long service life. The construction material and the manufacturing techniques for these consumables have been selected based on rigorous research, technical know-how, and field trials. Our consumables are manufactured using the latest machining techniques and heat treatment processes.


Please click on the link to view the list of consumables available with SRT


  1. Drill Rods

  2. Couplings and Bit Adaptors

  3. Top Hammer Threaded Bits

  4. Taper Bits

  5. Taper Rods


SRT sources high-quality consumables manufactured under stringent quality control procedures. Our products have been tried and tested in differing formations. They have performed well and are recognized for their long service life.


Sleeve Couplings

The basic function of the sleeve coupling in a rotary percussion drill string is to enable the joining of drill rods together thereby enabling the drilling of deeper or longer holes. Sleeve couplings are also required to transmit rotary motion and shockwave emerging from the top hammer from one rod to the other. SRT offers sleeve coupling, the simplest and most inexpensive type of coupling.


Bit Adaptor Couplings

Bit adaptor couplings ensure the possibility of connecting a percussion drill bit with one thread form and a drill rod with a different thread form.


Reduction Sleeve Coupling

Reduction coupling sleeves are very common in the drilling industry. It is like a standard sleeve coupling, but the connection enables joining rods having two different threads. The coupling itself has two different female threads.


Please click on the link below to view the different types of available couplings.


Extension Rod and MF Rods

SRT offers heavy-duty extension rods and MF rods made up of high-quality alloy steel. The rods are subjected to heat treatment to help them achieve the required fatigue resistance. The rods are also subjected to surface treatment to prevent corrosion. Please view our catalog by clicking on the link below.

Extension Rod & MF Rod


Top Hammer Bits

Threaded Bits

SRT offers threaded bits that enable the driller to drill holes of different diameters and formation characteristics. The threaded bits can be selected based on bit diameter, thread type, bit face configuration, bit body skirt built, and carbide button shape. Characteristics like bit face configuration, flushing holes quantity, quantity and size of carbides, and carbide button shape influence the desired penetration rate. These factors also need to be weighed against the bit cost for the selection of the optimum bit. Please click on the bit selection guide to view the factors which influence the top hammer bit selection.

Bit Selection Guide


Please click on the link to view the list of threaded bits available with SRT

Threaded Bits


Taper Bits and Rods

SRT also offers taper bits and taper rods generally used for tunnelling operations. Water is used as the flushing medium for these bits. Please click on the link below to view the taper bits and rods available with SRT.

Taper Bits


Taper Rods

Our Products


U 10/ 35 Durham Street,
St. Lucia-4067, Queensland, Australia.


07 3705 9644



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