professional Down The Hole Air Pressure Hammer 4'' for Hard Rock Drilling

4'' Down The Hole Air Pressure Hammer for Hard Rock Drilling with COP44 / DHD 340 / QL 40 shank

Application                                                                                                                                          

With professional manufacturing experience in DTH hammer production, our factory can supply you with high pressure and medium to low pressure DTH hammers. It strictly matches with API standard and other Chinese industry standards.It is durable for being produced with advanced craftwork and good material.

1. Deliver maximum energy to drilling bit, fast drilling speed and low air consumption due to the special inner structure of HD series DTH hammer designed according to newest rock drilling theory.

2. Smooth performance and long service life of HD series DTH hammer due to high quality alloy steel materials and advanced processing technology adapted.

3. Low problem rate and easy to maintenance due to simple, reliable and easy assemble and disassemble inner structure of hammer.

4. Easy to depart bit from hammer due to multi—head thread connecting chuck and cylinder of hammer.

5. Interchangeable with DTH bit and drill pipe

Characteristics                                                                                                                               

Hammer shank available:

1. BR shank series: BR1, BR2, BR3;
2. Cop shank series: Cop32, Cop34, Cop44, Cop54, Cop64, Cop84;
3. DHD shank series: DHD3.5, DHD340,DHD350, DHD360, DHD380;
4. SD shank series: SD4, SD5, SD6, SD8, SD10, SD12, SD15, SD18;
5. Mission shank series: Mission40, Mission50, Mission 60, Mission 80;
6. QL shank series: QL30, QL40, QL50, QL60, QL80;
7. NUMA shank series: NUMA120, NUMA125, NUMA180, NUMA240;
Other hammer shanks can be available according to customer's drawing or samples.

Specification                                                                                                                                    

		Item Description		Weight	Parts No.
		1.Top Sub		6.5	HD4501
		2.O-Ring of Top Sub		0.01	HD4502
		3.Check Valve		0.42	HD4503
		4.Spring		0.04	HD4504
		5.Compression Buffer		0.04	HD4505
		6.Air Distributor		2.2	HD4506
		7.Internal Cylinder		2.3	HD4507
		8.Piston		9	HD4508
		9.External Cylinder		15	HD4509
		10.O-Ring of stop ring		0.01	HD4510
		11.Stop Ring		0.2	HD4511
		12.Drive Chuck		3.5	HD4512
		13.Drill Bit		9	HD4513
According to customer's requirement,the top sub can be made into two spanners,and put protection buttons,An air controllinghole can be drilled on the check valve to provide more efficient cuttings discharge.

Packing& Delivery                                                                                                                             ​

Service                                                                                                                                              

In our after sales service system, We establish perfect control system strictly according to ISO-9000 series, in this system, technology date and problem solve solution and preventive measures will be provided in any maintain project, all the spare parts will be used in new OEM products with installation instructions, packing list, manufacturer's instruction, qualification and Warranty certificate.

We provide "one equipment & one case, endless service, namely the after sales service begin from the order confirmation, last for the working life of the equipment.

Purchase Process