Name: Quarry Middle Air Pressure Down The Hole Hammer for Sales
Brand: BESTLINK
Availability: InStock

Product Details

Product Description

DTH Hammer are one of our main products. It is durable for being produced with advanced craftwork and good material.After many years search, we have rich experience in development and manufacturing high quality products, which adopted high-quality raw materials, advanced technology and passed through strictly inspection.

It has many Advantages as below:

1. Deliver maximum energy to drilling bit, fast drilling speed and low air consumption

2. Smooth performance and long service life

3. Low problem rate and easy to maintenance

4. Easy to depart bit from hammer

5. Interchangeable with dth bit and drill pipe

Middle-low air pressure DTH hammer

HBR1A,HBR2A and HBR3A series DTH hammers are designed to operate efficiently at low air pressures and medium air pressures, using BR series bits.

The main features are as follows:

1.The operation air pressures are between 0.7Mpa to 1.75Mpa;

2.Valveless hammers;

3.Simple structure, easy to assemble and to disassemble, long life;

4.Higher impact frequency and faster drilling speed;

5.Lower air consumption and lower oil consumption. A hole can be drilled on the check valve to provide more efficient cuttings discharge.

6.Especially suitable for quarrying.

Technical Data:

DTH hammer type		HBR1A	HBR2A	HBR3A
Length(less bit) mm		760	880	889
Weight(less bit) kg		10	14.5	26
External diameter mm		Φ54	Φ62	Φ82
Bit shank		BR1	BR2	BR3
Hole range(mm)		Φ64-76	Φ70-90	Φ90-110
Connection thread		RD40 Box	RD50 Box	API 2 3/8"Reg
Working pressure		0.7-1.75Mpa	0.7-1.75Mpa	0.7-1.75Mpa
Impact rate at 1.4Mpa		27Hz	25Hz	25Hz
Recommended Rotation speed		25-40r/min	25-40r/min	25-40r/min
Air consumption	0.7Mpa	1.5m³/min	2.5m³/min	4.0m³/min
	1.0Mpa	2.5m3/min	4.0m3/min	6.0m³/min
	1.4Mpa	3.0m³/min	5.0m³/min	8.0m³/min

Breakdown Design and Spare Parts List

SN.	Item description	weight(kg)
	Hammer	HBR1A	HBR2A	HBR3A
1	Top sub	1.7	2.6	5.2
2	"O" ring of top sub	/	/	0.01
3	Check Valve	0.1	0.1	0.2
4	Spring	0.05	0.05	0.02
5	Air distributor	0.8	0.6	0.8
6	Internal cylinder	0.8	0.8	1.3
7	Piston	1.2	3.8	5.5
8	External cylinder	4	4.5	9.5
9	Guide sleeve	0.15	0.6	1
10	"O" ring of stop ring	0.05	0.005	0.05
11	Stop ring	0.1	0.1	0.15
12	Drive chuck	0.8	1.2	2
13	Drill bits	1.7	2.5	4