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Reverse Circulation RC DTH hammer Drilling Tools RC4.5-E542 Drill Bit

Reverse Circulation RC DTH hammer Drilling Tools RC4.5-E542 Drill Bit. Introduction of R.C. Drilling and R.C. DTH Hammers
R.C. Drilling,referred to as "Center Sample Recovery" or "Dual Wall Drilling", employs a Dual Wall Pipe where the drilling medium, normally high pressure air,is passed between the outer and inner tubes down to the face of the drilling bit where it is returned up the centre tube along with the sample cut by the drill bit.

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  • Reverse Circulation RC DTH hammer Drilling Tools RC4.5-E542 Drill Bit
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Well Drilling Reverse Circulation DTH Hammer Drill Bits for Mine Exploration



Introduction of R.C. Drilling and R.C. DTH Hammers

It has the following characteristics:
    R.C. Drilling,referred to as "Center Sample Recovery" or "Dual Wall Drilling", employs a Dual Wall Pipe where the drilling medium, normally high pressure air,is passed between the outer and inner tubes down to the face of the drilling bit where it is returned up the centre tube along with the sample cut by the drill bit.

1 DTH Reverse circulation Hammers for product photos
The use and the advantages of the R.C. DTH Hammers:
    No contamination
The R.C. System collects sample through the recovery holes in the face of the drill bit immediately as the cuttings or sample is formed.The drilled sample does not have to travel the length of the hammer where contamination and loss of sample takes place. 

Sandvik-5-5-1-2-Inch-Re052-Re547-Reverse-Circulation-RC-Hammer



    Higher Production
In broken and fractured ground conditions, the R.C. will often out perform the conventional hammer in terms of penetration rates.

    Dry Sample
Even in certain water bearing stratas it is still possible to collect a dry sample because the cuttings(sample) are collected as they formed through the face of the drill bit.

    Higher Sample Recovery
Because the sample is collected through the face of the drill bit there is no loss of sample when drilling through broken or fractured ground. And since the bit matched to the chuck size,there is very little bypass of sample and recovery rates of up to 98% are generally achievable.

3" R.C.Hammers Item Description Weight(Kg) Part Number
1 Top Sub 3.76 RC3-E531-01
2 "O"Ring 0.01 RC3-E531-02
3 Adaptor Screen 1.85 RC3-E531-03
4 "O"Ring 0.01 RC3-E531-04
5 Sample Tube 1.97 RC3-E531-05
6 Circlip 0.04 RC3-E531-06
7 "O"Ring 0.01 RC3-E531-07
8 "O"Ring 0.01 RC3-E531-08
9 Distributor 0.37 RC3-E531-09
10 Plunger 0.08 RC3-E531-10
11 "O"Ring 0.01 RC3-E531-11
12 Spring 0.10 RC3-E531-12
13 Mount Sample Tube 0.49 RC3-E531-13
14 Lnner Cylinder 3.40 RC3-E531-14
15 Piston 4.69 RC3-E531-15
16 Piston case 9.20 RC3-E531-16
17 Seal cover 0.02 RC3-E531-17
18 Bush Drive Sub 1.03 RC3-E531-18
19 Bit Retaining Ring 0.08 RC3-E531-19
20 "O"Ring 0.01 RC3-E531-20
21 Shroud 0.45 RC3-E531-21
22 Drive Sube 1.60 RC3-E531-22
23 Drill Bit 4.20 RC3-E531-23


Length(exclusive bit) Weight(exclusive bit) External Diameter Bit Shank Hole Range Connection Thread
1069mm 29.0kg 81mm RE531 84-100 3"remet
Working Pressure Impact rate at 2.4Mpa Recommended rotation speed Air Consumption
1.7Mpa 2.4Mpa 3.0Mpa
1.0-3.0Mpa 30Hz 25-40r/min 7m³/min 10m³/min 14m³/min

03 packing site for reverse circulation drill bits


02 dth drill bits for production site



Bestlink Factory

Xiamen Bestlink Factory Co., Ltd  is  committed  to  provide  the  best  drilling  and  cutting machine,  tools and accessories products in marble and granite stone quarrying,  as well as in civil engineering application, especial demolition project. it is now a leading manufacturer of cutting and drilling equipment for the extraction of marble, granite  and ornamental stones in china.  

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