Products Description

Engineered for medium-diameter borehole drilling, they strike a perfect balance between maneuverability and drilling productivity. Boasting a sturdy structure, dependable operation, and strong adaptability to complicated stratum conditions, these hammers are compatible with most medium-sized drilling rigs. They act as essential tools in foundation construction, water well drilling, mining activities, and geotechnical surveys. This specification is highly favored due to its broad applicability and cost-effectiveness in medium-scale drilling tasks.

Parameters

Mainstream global models of 4 inch DTH hammers with mature technology and wide market acceptance:

DHD340	Known for reliable performance, it is widely used in mining and large-scale water well drilling projects.
COP44	Offers high drilling efficiency, making it ideal for hard rock and deep hole construction.
SD4	Cost-effective with reliable quality, it is popular in civil foundation and geotechnical engineering projects.
MISSION40	Possesses strong adaptability, suitable for complex strata and harsh construction environments.

DTH bit shanks for 4inch DTH Hammer	Bit Dia.		Air Hole Nos.	Gauge	Front	Weight
DTH bit shanks for 4inch DTH Hammer	mm	inch	Air Hole Nos.	Buttons	Buttons	(Kg)
DHD340A	105	4 1/8"	2	6×φ14	5×φ13	9
	110	4 1/4"	2	7×φ13	6×φ13	9.3
	115	4 1/2"	2	7×φ14	6×φ13	10
	120	4 3/4"	2	8×φ14	6×φ14	11
	127	5	2	8×φ14	7×φ14	12
SD4	105	4 1/8"	2	6×φ14	5×φ13	9
	110	4 1/4"	2	7×φ13	6×φ13	9.5
	115	4 1/2"	2	7×φ14	6×φ13	9.8
	120	4 3/4"	2	8×φ14	6×φ14	11.5
	127	5	2	8×φ14	7×φ14	12.3
QL40	105	4 1/8"	2	6×φ14	5×φ13	9
	110	4 1/4"	2	7×φ13	6×φ13	9.2
	115	4 1/2"	2	7×φ14	6×φ13	9.5
	120	4 3/4"	2	8×φ14	6×φ14	10.3
	127	5	2	8×φ14	7×φ14	11.5
Mission40	105	4 1/8"	2	6×φ14	5×φ13	6
	110	4 1/4"	2	7×φ13	6×φ13	6.2
	115	4 1/2"	2	7×φ14	6×φ13	6.6
	120	4 3/4"	2	8×φ14	6×φ14	7
	127	5	2	8×φ14	7×φ14	7.4

DHD 340-DTH Hammer

Ref.	Parts	Weight	Ref.	Parts	Weight
1	Top Sub	8.8 Kg	9	External Cylinder	15.9 Kg
2	"O"Ring	0.01 Kg	10	Stop Ring	0.2 Kg
3	Check Valve	0.46 Kg	11	"O"Ring	0.01 Kg
4	Spring	0.04 Kg	12	Drive Chuck	3.7 Kg
5	Compression Buﬀer	0.2 Kg	13	Drill Bit
6	Air Distribution	2.1 Kg
7	Internal Cylinder	2.45 Kg
8	Piston	9 Kg

DHD 340 Technical parameters
Length(Without Bit)	Weight	External diameter	Connection Thread	Bit Shank	Hole Range
1032mm	43Kg	Φ99mm	API2 3/8"REG	DHD340	Φ110-Φ135mm
Working pressure		Recommended rotation speed		Air Consumption
Working pressure		Recommended rotation speed		1.0Mpa	1.5Mpa
1.0-2.2Mpa		30-60 r/min		5.53m³/min	10m³/min

QL40-DTH Hammer

Ref.	Parts	Weight	Ref.	Parts	Weight
1	Top Sub	8.8 Kg	9	Piston Case	16.5 Kg
2	"O"Ring	0.01 Kg	10	Guided Sleeve	0.9 Kg
3	Check Valve	0.46 Kg	11	Retainer Ring	0.2 Kg
4	Spring	0.04 Kg	12	"O"Ring	0.01 Kg
5	rubber Buﬀer	0.2 Kg	13	Drive Chuc	3.3 Kg
6	Valve Sea	2.1 Kg	14	Drill Bit
7	Inner Cylinder	2.45 Kg
8	Piston	8.8 Kg

Technical parameters
Length(Without Bit)	Weight	External diameter	Connection Thread	Bit Shank	Hole Range
1102mm	43.7Kg	Φ99mm	API2 3/8"REG	QL40	Φ110-Φ135mm
Working pressure		Recommended rotation speed		Air Consumption
Working pressure		Recommended rotation speed		1.0Mpa	1.8Mpa
1.0-2.2Mpa		30-60 r/min		5.5m³/min	10m³/min

M40 Hammer

M40-DTH Hammer

Ref.	Parts	Weight	Ref.	Parts	Weight
1	Top Sub	8.1 Kg	9	Guided Sleeve	1.84 Kg
2	"O"Ring	0.01 Kg	10	Retainer Ring	0.3 Kg
3	Check Valve	0.3 Kg	11	"O"Ring	0.01 Kg
4	Spring	0.04 Kg	12	Drive Chuck	3.9 Kg
5	Valve Seat	1.5 Kg	13	Drill Bit
6	Inner Cylinder	2.1 Kg
7	Piston	8.4 Kg
8	Piston Case	15 Kg

M40 Technical parameters
Length(Without Bit)	Weight	External diameter	Connection Thread	Bit Shank	Hole Range
1004mmmm	40.5Kg	Φ99mm	API2 3/8"REG	M40	Φ110-Φ135mm
Working pressure		Recommended rotation speed		Air Consumption
Working pressure		Recommended rotation speed		1.0Mpa	1.5Mpa
1.0-2.2Mpa		30-60 r/min		5m³/min	9m³/min

Core Performance Features

Balanced design: With moderate size and weight, it is easy to install and transport, making it suitable for both indoor and outdoor construction sites.
Effective rock breaking: Equipped with strong impact energy and stable frequency, it ensures a high penetration rate when drilling in medium-hard to hard rock formations.
Long-lasting structure: Internal components are crafted from high-strength alloy steel, featuring excellent wear and impact resistance to extend the service life.
Smooth slag removal: The optimized air channel and exhaust structure effectively flush cuttings and reduce the risk of hole blocking.
Wide compatibility: It can be matched with various 4 inch DTH bits (button bits, cross bits) and adapt to different strata such as sand, gravel, and hard rock.

Application Scenarios

Water well drilling: Used for shallow to medium-deep water well construction in rural and urban areas, adapting to sand, gravel, and medium-hard rock strata.
Mining operations: Applied in drilling medium-diameter blasting holes in open-pit mines, quarries, and underground mines.
Geotechnical exploration: Utilized for core drilling and stratum sampling in geological surveys and engineering investigation projects.
Foundation engineering: Used for drilling medium-diameter pile holes, slope reinforcement holes, and drainage holes for buildings and roads.