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Down-The-Hole DTH Drilling Tools

Drilling Supply



DTH Hammers

"Down The Hole" (DTH) hammers provide the most versatile and cost effective rock drilling method available to date. 

Drilling Supply offers an extensive range of DTH hammers suitable for a wide variety of drilling techniques and environments.

Our existing customers, having operated a variety of drills using other major hammer brands, know that our products strike a perfect balance of the best performance for the price for any drilling situation.

2 inch Hammer Range

DTH hammer D100

- Designed for small diameter drilling operations
- Superior drilling performance makes it at least 50% faster than its nearest competitor
- Suitable for operation at air pressures of 7-17 Bar (100-250psi)
- Drilling diameters from 55mm - 66mm
- The valveless design provides high performance at both low and high pressures
- Robust design withstands heavy duty applications
- A non-return valve is fitted improving its performance where ground water is present.

D100 specification sheet

DTH hammer M 20

- Suitable for operation at air pressures of 7-17 Bar (100-250psi)
- The valved design of the Mach 20 provides high performance at low pressures
- Strong design withstands heavy duty applications
- Drilling diameters from 70mm to 80mm
- All steel valve provides reliable operation and avoids the possibility of heat distortion
- Three levels of air volume with a variety of chokes available

M20 specification sheet

3 inch Hammer Range

DTH hammer M303

General purpose hammer for small hole drilling in applications such as seismic and geological survey, micro-pilling, floor, wall and roof bolting or for blast holes where environmental considerations limit hole size and blasting procedure. Suitable for drilling a wide range of air pressures in both soft and hard rock conditions.

M303 specification sheet

 

DTH hammer DT 350

Particularly suitable for low pressure operations although capable of working between 7-24 bar (100-350 psi). Drilling diameters on 90mm to 104mm (3 1/2" - 4 3/32").

DT350 specification sheet

 

DTH hammer D350

A high performance hammer for medium to hard rock conditions. Operates at an optimum air pressure between 14-24 bar (300-350 psi)

D350 specification sheet

4 inch Hammer Range

DTH hammer NT4

The NT4 has been specifically designed for high production drilling in blast hole applications. The hammer is simple, robust and has few parts, making it user friendly and reliable. The NT4 utilizes the 12 spline shank which has simplistic robust geometry combined with increased drive contact area.

NT4 specification sheet

DTH hammer M44

The Mach 44 is a general purpose hammer used at pressures up to and including 350 psi (24 bar). It is suitable for all rock conditions at a wide range of air pressures. The Mach 44 has a proven track record of performance and reliability.

M44 specification sheet

DTH hammer SD400

The SD400 is designed for maximum performance at higher pressures, up to and including 350 psi (24 bar). It is a heavy duty hammer with thicker 98mm diameter outer components to provide an extended service life in abrasive conditions and is also suitable for water well drilling.


DTH hammer Groutmaster 400

The Groutmaster 400 is designed specifically for use with grouting systems. The hammer is designed to take a drill bit fitted with a high pressure non-return valve to prevent grout entering the hammer.

SD400 and Groutmaster400 specification sheet

5 inch Hammer Range

DTH hammer NT5

The NT5 is designed to give maximum performance in blast hole applications. The NT5 has been tuned to efficiently utilize the air supply to give optimum penetration rates. This hammer is suitable for drilling a wide range of air pressures, excelling at higher pressures. Also available in a heavy duty version for increased life in abrasive conditions and an extra version for deep hole drilling.

NT5 specification sheet

DTH hammer M50

The M50 is a general purpose hammer suitable for all rock conditions at a wide range of air pressures - 100-350 psi (7-24 bar). The hammer is fitted with a reversible cylinder to prolong the service life. This hammer is versatile and reliable, requiring only a few simple tools for servicing and maintenance.

M50 specification sheet

DTH hammer D500

The D500 is a high performance hammer for medium to hard rock conditions at a wide range of air pressures - 100-350 psi (7-24 bar). This hammer's high performance is achieved through the use of a wide bodied piston which delivers a greater blow energy.

D500 specification sheet

DTH hammer SD500

The SD500 a class leader in performance, is suitable for drilling a wide range of air pressures, excelling at higher working pressures. For water well and shallow gas and oil applications with a top supported piston and a recommended minimum bit size of 135mm.

SD500 specification sheet

DTH hammer SD550 HD

The SD550 HD combines the raw power of the SD500 with extended hammer life in abrasive conditions due to its larger outside diameter.

SD550 HD specification sheet

6 inch Hammer Range

DTH hammer NT6

The NT6 has been specifically designed for high production drilling in blast hole applications with  increased hammer's air pressure making it easy to hammer through even the hardest of rock structures. The NT6 hammer is available in a heavy duty version for increased life in abrasive conditions and an extra version specifically for deep hole drilling.

NT6 specification sheet

DTH hammer SD600

The SD600 is one of the fastest 6 inch hammers specifically designed for high production drilling in blast hole applications. The SD600 is a reduced weight hammer with water well drilling capabilities.

SD600 specification sheet

DTH hammer SD650

The SD650 combines the raw power of the SD600 with extended hammer life in abrasive conditions due to its heavy duty outside diameter and reversible cylinder with a recommended minimum bit size of 6 3/4".

SD650 specification sheet

DTH hammer M60

The M60 is a versatile and reliable hammer. It is economical to operate due to its relatively low air consumption. A reversible cylinder further reduces running costs by extending life.

M60 specification sheet

DTH hammer D600

The D600 is a class leader in performance and is suitable for drilling a wide range of air pressures, excelling at higher working pressures. With water well drilling capabilities and a recommended minimum bit size of 6".

D600 specification sheet

7 inch Hammer Range

DTH hammer D750

The D750 is suitable for a wide range of air pressures, 100-350psi (7-24 bar). Drilling hole diameters of 192mm to 254mm (7 5/8" to 10"). The mining, quarrying and waterwell drilling industries will all benefit from the high reliability offered by a one piece top adaptor / air distributor. A reversible cylinder is also fitted to the D750 to prolong hammer life and reduce costs.

D750 specification sheet

8 inch Hammer Range

DTH hammer D800

The D800 is a general purpose hammer suitable for a wide range of air pressures, 100-350psi (7-24 bar). The D800 is a well drilling hammer with a mid-range air volume.

D800 specification sheet

DTH hammer D880

The D880 is a well drilling hammer with a mid range air volume. A choice of blank, 4mm, 6mm or 8mm chokes can be fitted to provide varied air flow making the D880 a versatile hammer. The wide body diameter allows for an increased piston weight and therefore an improved performance.

D880 specification sheet

DTH hammer D880 DW

The D880 DeepWell hammer has been specifically designed for drilling deep holes where ground water is present.

D880 DW specification sheet

DTH hammer D850

The D850 has been designed for high performance drilling in hard to medium rock formations, particularly mining applications. Its class leading performance has been achieved with a larger / heavier piston and a valveless air cycle providing a 50% increase in stroke. As well as a reversible cylinder for prolonged hammer life the D850 benefits from a QL80 shank design.

D850 specification sheet

10 inch Hammer Range

DTH hammer D1000

The D1000 incorporates a unique piston design for high performance and reliability especially in water well applications. Its optimum performance is reached at air pressures of 200psi (14 bar) and above. The D1000 has a body diameter of 230mm and a piston weight of 87.6kg, one of the heaviest in its class providing excellent performance. A reversible cylinder is fitted to the hammer to prolong its life and reduce costs. "Captive" bit retaining rings and an improved 2 start thread design ensures that the D1000 is simple to service with only a few tools.

D1000 specification sheet

12 inch Hammer Range

DTH hammer M120

The M120 accepts A100-15 (SD12) shank bits and has a working pressure range of 170-350psi (12-24bar) while its optimum performance is reached at air pressures of 200psi (14bar) and above.

DTH hammer M122

The M122 accepts A100-15 (SD12) shank bits and drills most efficiently at air pressures between 100psi (7bar) and 170psi (12bar). Due to its higher air pressure this hammer provides increased uphole velocity particularly when using oversized diameter bits.

M120 and M122 specification sheet

DTH hammer M132

The M132 hammer accepts IR DHD112 shank bits. This hammer, although capable of high pressure drilling, is particularly suitable at pressures between 100-200psi (7-14bar). This hammer has a pin drive arrangement to prevent spline to spline contact thereby minimizing spline wear and damage which can result in bit shank failure.

M132 specification sheet

DTH hammer M142

The M142 hammer accepts IR DHD112S shank bits and is equipped with an oversized chuck to drill larger diameters at air pressures between  100-350psi (7-24bar). This oversize chuck protects the cylinder and prolongs life. This hammer has a pin drive arrangement to prevent spline to spline contact thereby minimizing spline wear and damage which can result in bit shank failure.

DTH hammer SD1200

The SD1200 accepts QL120 shank bit and drills most efficiently at air pressures between 100psi (7bar) and 170psi (14bar). Due to its higher air consumption this hammer provides increased uphole velocity, particularly when using oversized diameter drill bits.

SD1200 specification sheet


 

DTH Bits

The drill bit is the cutting element of any DTH drilling system and a hammer is only as good as the bit it uses.

The down-the-hole bit (DTH) is subject to severe stress from the striking piston as well as from the abrasive cuttings passing around the bit at high velocity. When selecting the right bit for optimum performance you have to strike a fine balance between penetration capability and bit life. On occasion, you can successfully sacrifice the bit life expectancy for the penetration speed. In such cases remember a rule of thumb that states that a 10% increase in penetration forgoes at least a 20% of bit life expectancy.

The drill bits offered by Drilling Supply are manufactured to the most stringent standards, using high quality materials to provide you with a reliable, high performance cutting edge for your drilling equipment.

We offer a comprehensive range of standard and made to order drill bits on an extensive selection of shanks with a wide variety of head designs to suit every applications.

2 Inch Bit Range

D100 shank bits
For use in D100 hammers

M20 shank bits
For use in M20 hammers

3 Inch Bit Range

M303 shank bits
For use in M303 hammers

DHD 3.5 shank bits
For use in D350 hammers & D350 hammers

4 Inch Bit Range

NT4 shank bits
For use in NT4 hammers

M44 shank bits
For use in M44 & SD400 hammers

DHD340 shank bits
For use in SD400 hammers

(SD4 shank bits
For use in SD400 hammers

5 Inch Bit Range

QL50 shank bits
For use in NT5 hammers

M50 shank bits
For use in M50 & D500 hammers

DHD350R shank bits
For use in SD500 & SD550HD hammers

A43-15 (SD5) shank bits
For use in D500 hammers

6 Inch Bit Range

QL60 shank bits
For use in NT6 hammers

Mach 60 shank bits
For use in M60 & D600 hammers

DHD360 shank bits
For use in SD600, & D600 hammers

A53-15 (SD6) shank bits
For use in SD650 & D600 hammers

8 Inch Bit Range

Mach 80 shank bits
For use in D800 hammers

DHD380 shank bits
For use in D800, D880 & D880 deep well hammers

SD8 shank bits
For use in D750, D800 & D880 hammers

QL80 shank bits
For use in D850 hammers

10 Inch Bit Range

SD10 shank bits
For use in D1000 hammers

12 Inch Bit Range

SD12 shank bits
For use in M120 & M122 hammers

DHD112 shank bits
For use in M132 hammers

DHD112S shank bits
For use in M142 hammers

QL120 shank bits       
For use in SD1200 hammers

Specs upon request


Sub Adapters

Drilling Supply offers various types of sub adaptors for all common configurations, as well as specialty adaptors listed bellow.

Some examples of common threads of our sub adaptors (From / To):

6 5/8 API REG PIN; 6 5/8 API REG BOX ; 4 1/2 API REG PIN ; 4 1/2 API REG BOX ; 3 1/2 API REG PIN ; 3 1/2 API REG BOX ; 2 7/8 API REG PIN ; 2 7/8 API REG BOX ; 2 3/8 API REG PIN ; 2 3/8 API REG BOX ; 4 1/2 API IF PIN ; 4 1/2 API IF BOX ; 3 1/2 API IF PIN ; 3 1/2 API IF BOX ; 2 7/8 API IF PIN ; 2 7/8 API IF BOX ; 2 3/8 API IF PIN ; 2 3/8 API IF BOX ; 3" BECO PIN ; 3" BECO BOX ; 70mm DIN 6TPI PIN ; 70mm DIN 6TPI BOX ; 70mm DIN 4TPI PIN ; 70mm DIN 4TPI BOX ; 50mm DIN 6TPI PIN ; 50mm DIN 6TPI BOX ; 40mm DIN 6TPI PIN ; 40mm DIN 6TPI BOX ; NWY PIN ; NWY BOX ; HOLMAN 3TPI PIN ; HOLMAN 3TPI BOX ; 4N BOX ; 3N BOX ; N ROD BOX ; NW ROD BOX ; B ROD BOX ; BW ROD BOX ; A ROD BOX ; AW ROD BOX ; E ROD BOX ; EW ROD BOX ; M4 PIN / BOX; Mietzke PIN / BOX all sizes  ETC..

Specialty adaptors:

"Retro" Sub Adaptors- "Retro" Sub Adaptors 
Retro sub adaptors assist pulling out down the hole hammers in difficult drilling conditions, where collaring occurs.


BOTTOM THREAD    SKIRT DIA.       TOP THREAD.
3.1/2" Api Reg box     124mm             3.1/2" Api Reg Pin
3.1/2" Api Reg Box     152mm             3.1/2" Api Reg Pin
3.1/2" Api Reg Box     182mm             3.1/2" Api Reg Pin
2.3/8" Api Reg Box     93mm               2.3/8" Api Reg Pin

- "Retrac" Sub Adaptors
This type of sub which includes 4 TC buttons is designed specifically for 5" hammers using 76mm and 90mm tubes to prevent collaring when withdrawing from the hole.

BOTTOM THREAD        SKIRT DIA.       TOP THREAD
3.1/2" Api Reg box        124mm            3.1/2" Api Reg Pin
3.1/2" Api Reg Box        152mm            3.1/2" Api Reg Pin
3.1/2" Api Reg Box        182mm            3.1/2" Api Reg Pin
2.3/8" Api Reg Box        93mm              2.3/8" Api Reg Pin

Air By-Pass Sub AdaptorAir By-Pass Sub Adaptor

Fitted immediately above a DTH hammer, the sub allows extra air to be sent direct to exhaust to assist up-hole velocity at low air pressures or when drilling with oversize e bit diameters.

OUTSIDE DIA.          BOTTOM THREAD              TOP THREAD
135mm                     3.1/2" Api Reg Box          3.1/2" Api Reg Box

Each adaptor is supplied with an air bleed kit including bored BSP plugs. The chart below lists the extra air volume which can be passed. The air volumes quoted are for one bored plug only.



Please contact us If you have any questions and we will be happy to provide you additional information on our range of DTH drilling tools upon request.

Ask for a quotation today and see why drillers around the world trust us.