Delivery Time:In stock or as order quantity
Certification:ISO,CE

Big Diameter Hole Dilling High pressure DTH Hammer for 90 - 455 mm Hole Range

8\'\' DHD380 , COP84,SD8,Mission 80,QL80 Shank fast drilling DTH hammer 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
13.Breakout Ring	0.2	HD8513
14.Drive Chuck	17.5	HD8514
15.Drill Bit	40	HD8515
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.

Technical Data
Length (Less bit)	Weight (Less bit)	External Diameter	Bit Shank	Hole Range	Connection Thread
1492mm	188kg	180mm	COP84  DHD380	203-305mm	API 4-1/2\'\'REG
Working Pressure	Impact rate at 0.5 Mpa	Recommended Rotation Speed	Air Consumption
1.0-2.5Mpa	20HZ	20-30r/min	1.0Mpa	1.8Mpa	2.4Mpa
15m3/min	26m3/min	34m3/min

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