8 inch Carbide High Air Pressure DTH hammer for Big Diameter Hole Drilling

8 inch Carbide High Air Pressure DTH hammer for Big Diameter Hole Drilling

8inch Fast drilling DTH hammer with DHD380 , COP84,SD8,Mission 80,QL80 Shank for big diameter hole drilling

Introduction

It is a kind of valveless high air pressure DTH hammer with foot valve.

The rock hammer has the fellow advantages

1: Valveless air distribution. more reliable.

2. The rock impacter are simple design of the piston, long life.

3. More efficient energy transfter,faster drilling speed, lower air consumption and lower oil consumption.

4. Fewer internal parts, simple structure, long life, less failure and easier to maintain because all the parts are heat treated.

5. Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected multi-step thread.

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.

Technical Parameters of High air pressure DTH hammer with foot valve

Specification

		Item Description		Weight	Parts No.
		1.Top Sub		41	HD8501
		2.O-Ring of Top Sub		0.02	HD8502
		3.Breakout Ring		0.2	HD8503
		4.Check Valve		1.5	HD8504
		5.Spring		0.1	HD8505
		6.Compression Buffer		0.42	HD8506
		7.Air Distributor		0.13	HD8507
		8.Internal Cylinder		8.6	HD8508
		9.Piston		41	HD8509
		10.External Cylinder		62	HD8510
		11.O-Ring of stop ring		0.02	HD8511
		12.Stop Ring		1.2	HD8512