RC Hammers Bits DTH Hammer Bit Reverse Circulation Rock Drill Tools 139mm RC DTH Hammers Bits

• After-sales Service: Online Support
• Warranty: 6 Months
• Color: as You Request
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: 4 Inch Down The Hole DTH Hammers
• Model No.: HRC/RC
• Usage: for DTH Driller
• Material: High Manganese Steel
• Type: Drilling Machine
• Mining Object: Coal Machinery
• Transport Package: Pallet
• Specification: CE
• Trademark: Bestlink
• Origin: China
• HS Code: 82071990
• Production Capacity: 5000000PCS Per Year
• Package Size: 70.00cm * 70.00cm * 70.00cm
• Package Gross Weight: 120.000kg

Product Description

Rc Hammers Bits Dth Hammer Bit Reverse Circulation Rock Drill Tools 139mm RC DTH Hammers Bits

 

RC series reverse circulation DTH hammer is the latest developed product of our company. It is mainly used for deep exploration drilling and core sampling.

Reverse Circulation RC DTH Drill Bit
RCseries reverse circulation DTH Hammer is the latest developed product of our company. It is mainly used for deep exploration drilling and ore grade control.

 

It has the following characteristics:

1.Based on previous experience of ordinary hammers, combined with the features of reverse circulation hammer, optimized internal structure and ideal energy transfer, thus ensuring the series of hammers drilling with fast, smooth and continuous sampling.

2. The internal structure is very simple with components of high rigidity, thus ensuring long life and easy maintenance of the hammer.

3.The collection tube adopts an integrative design and can be replaced without disassembling the hammer. With carburizing treatment, it has good abrasive resistance.

4.Equipped with bits designed with patent. Simply by replacing the drill bit, the same hammer can drill holes of different sizes ensuring that the sample is not contaminated.

5. In difficult conditions such as loose soil, hard rock and plenty of water exists, sampling can be done well.

Reverse Circulation Hammers Specification:

Reverse Circulation Hammers
Description	Weight(kg)
	RC45	RC55	RC65	RC52
1. Internal Circlip	0.03	0.04	0.05	0.04
2. Air Screen	0.35	0.44	0.65	0.44
3. Top Sub	6.50	9.65	20.00	9.65
4. "O" Ring	0.01	0.02	0.02	0.02
5. Sample Tube	5.10	6.72	12.50	6.75
6. Check Valve	0.25	0.68	0.85	0.68
7. Spring	0.04	0.12	0.10	0.12
8. "O" Ring	0.01	0.02	0.02	0.02
9. Air Distributor	0.85	1.48	3.50	1.48
10. "O" Ring	0.02	0.01	0.02	0.01
11. Internal Cylinder	2.20	4.12	4.20	4.12
12. Piston	8.50	16.90	24.00	16.90
13. External Cylinder	14.50	19.50	32.00	21.50
14. Guided Sleeve	1.20	0.90	5.50	1.90
15. "O" Ring	-	-	-	0.02
16. Stop "O" Ring	-	-	-	0.01
17. Stop Ring	-	-	-	0.32
18. Shrout	-	-	-	1.86
19. Drive Chuck	3.20	5.65	6.50	4.17
20. Bit Retaining Pin	0.01	0.15	0.30	-
21. Drill Bit	10.50	15.80	31.00	11.05
Technical Data
Model	RC45	RC55	RC65	RC52
Length (Without Bit)	1020mm	1111mm	1250mm	1208mm
Weight (Without Bit)	94.00kg	66.50kg	110.00kg	70.00kg
External Diameter	φ99mm	φ126mm	φ146mm	φ126mm
Bit Shank	NRC45	NRC55	NRC65	PR52
Hole Range	φ114 - φ127mm	φ133- φ152mm	φ155- φ190mm	φ133- φ146mm
Connection Thread	As required	As required	As required	As required
Working Pressure	1.0 - 3.0 Mpa	1.5 - 3.5 Mpa	1.5 - 3.5 Mpa	1.5 - 3.5 Mpa
Impact Rate at 17 Bar	30HZ	35HZ	28HZ	35HZ
Recommended Rotation Speed	25 - 40 r/min	25 - 40 r/min	25 - 40 r/min	25 - 40 r/min
Air Consumption	1.0Mpa: 8 m³/ min	1.7Mpa: 16 m³/ min	1.7Mpa: 20 m³/ min	1.7Mpa: 16 m³/ min
	1.8Mpa: 12 m³/ min	2.4Mpa: 22 m³/ min	2.0Mpa: 26 m³/ min	2.4Mpa: 22 m³/ min
	2.4Mpa: 16 m³/ min	3.0Mpa: 28 m³/ min	3.0Mpa: 35 m³/ min	3.0Mpa: 28 m³/ min

 

Basics of Reverse Circulation Drilling:
(1) RC drilling uses rods with inner and outer tubes, the drill cuttings are returned to surface inside the rods. The drilling mechanism is a pneumatic reciprocating piston known as a hammer driving a tungsten-steel drill bit.
(2) RC drilling utilizes much larger rigs and machinery and depths of up to 500 meters are routinely achieved. RC drilling ideally produces dry rock chips, as large air compressors dry the rock out ahead of the advancing drill bit.
(3) RC drilling is slower and costlier but achieves better penetration than RAB or air core drilling; it is cheaper than diamond coring and is thus preferred for most mineral exploration work.
(4) Reverse circulation is achieved by blowing air down the annulus of the rod, the differential pressure creating air lift of the water and cuttings up the inner tube which is inside each rod. It reaches the deflector box at the top of the drill string then moves through a sample hose which is attached to the top of the cyclone.
The drill cuttings travel around the inside of the cyclone until they fall through an opening at the bottom and are collected in a sample bag. For any drill hole there will be a large number of sample bags, each one marked to record the location and drilling depth that the sample was obtained.
The collected series of sample bag cuttings are later taken for analysis to determine the mineral composition of the drill hole. The analysis results of each individual bag represents the mineral composition at a particular sample point in the drill hole. Geologists can then survey the drilled ground analysis and make decisions about the value of the overall mineral deposit.



Applications
1. Mine and quarry
2. Road construction for the drilling and blasting work
3. Water well drilling
4. Slope protection