SD Shank DTH Drill Bit

The “DTH” is the abbreviation of “Down The Hole” and sometimes it is also called “RAB” in some markets, and the “RAB” is short for “Rotary Air Blasting”.
SD Shank DTH Drill Bit is widely used in underground mining, quarries, hydraulic and Hydro-Power Engineering, water well drilling. Mineral exploration, anchoring hole drilling, geothermal engineering, Subway excavation, another civil engineering....

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GMD could supply the DHD series DTH Bit with cemented carbide buttons have very good wear-resistant. Buttons are strong in the mining process and could meet requirements of various rocks , and the service lifetime is very long.

Shank Type:  SD4, SD5, SD6, SD8

Bit Diameter: 105mm-305mm

Bit Face Design: Flat Face, Convex Face, Concave Face, Drop Center, Double Gauge.


SD6 DTH Bit-1

Details, kindly check below:

SD6 DTH Bit-3  

SD Shank DTH Drill Bit with Foot Valve



Northern Europe: foundation, piling

Western Europe: water well and geothermal drilling

Russia: Oil, infrastructure and mining.

South east Asia: mining and geothermal

South Africa: mining and water well drilling

Middle east: water well drilling

Oceania: mining, exploration and water well drilling

South America: water well drilling and mining

How to Select DTH Bits Face Shape

 Bit and Carbide Design


1. Flat Face Bit

This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash

2. Convex Face

For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce the load and wear on the gauge buttons, but poor hole deviation control.

3. Concave Face

The all-round application bit face specifically for medium hard and homogenerous rock formations. Good hole deviation control and good flushing capacity.

4. Drop Center Bit

For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.

5. Double Gauge Face

This kind of face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressures and good resistance to steel wash step gauge bit.



The information you may like to know before order:


1. Q:Methods of Payment:

   A: T/T (Telegraphic Transfer) or Western Union or L/C at sight

2. Q: Handling time for an order

   A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Q: Shipping way

   A: Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air

      Bulk order: we suggest by air or by sea.

4. Q: Quality Control

   A: We have our own experienced QC.

  There will be strict inspection and testing for every order before shipping out.

5. Q: After Services:

   A: (1). Our sales team will response for your question within 24 hours (Holidays Excluded)

      (2). Technical Support will be available in any time

      (3). Free replacement will provide once the failure confirmed caused by our product quality


Rock Bit Care


The total life or distance that a rock bit will drill depends on many factors. Of these,

rock bit reconditioning can be the major factor both in the cost and performance of

any rock bit, button or rooftop insert.


Button bits should be reconditioned if the buttons polish or show signs of surface fracturing in non-abrasive rock. This will prevent the surface fractures from propagating which could result in fracturing the buttons.


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SD Series DTH Bits

DTH Bits for Hard Rock Drilling

High Air Pressure COP Series DTH Bits for Hard Rock Drilling

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DTH Button Bits

High Air Pressure DTH Button Bit

Large Diameter Button Bits

Down The Hole Drilling Tools


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