ND640 DTH Hammer (High pressure)

Brand Name: D miningwell
Minimum Order Quantity: 1 set
Packaging Details: Plastic/Wooden Case
Delivery Time: 7-10 days
Payment Terms: L/C, T/T, Western Union
Usage: Quarry, Mining, Water well drilling, Foundation piling, Tunneling ...

A rotation drill rig, air compressor and the “DTH drill string” are the essential unit for DTH drilling while the “DTH drill string” is always made up of DTH drill rods, DTH hammer and DTH bits.
As one of key component, the DTH hammer acts as a role of converting the air pressure to the impact energy, simultaneously transferring impact energy and rotation force to DTH bits.

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Product Introduction

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Technical data

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Product Introduction

A rotation drill rig, air compressor and the “DTH drill string” are the essential unit for DTH drilling while the “DTH drill string” is always made up of DTH drill rods, DTH hammer and DTH bits.
As one of key component, the DTH hammer acts as a role of converting the air pressure to the impact energy, simultaneously transferring impact energy and rotation force to DTH bits.

Show details

Technical data

Technical Parameters
Length(Less bit)	Weight	Outer Diameter	Connection Thread	Bit Shank	Hole Range
2390mm	3795.5Kg	Φ640mm	320 Hexagonal	ND640	Φ720-Φ1000mm
Work Pressure		Recommanded Rotation Speed		Air Consumption
Work Pressure		Recommanded Rotation Speed		1.8Mpa	2.4Mpa
1.5-3.5Mpa		15-30 r/min		92 m³/min	122 m³/min

Ref.	Parts	Weight
1	“O”Ring	0.05 Kg
2	“O”Ring	0.05 Kg
3	Top Sub	705.5 Kg
4	Adjuster Shim	15.4 Kg
5	“O”Ring	0.2 Kg
6	Check Valve	7.5 Kg
7	Spring	0.4 Kg
8	Rubber Buffer	3 Kg
9	Valve Seat	203.6 Kg
10	“O”Ring	0.2 Kg
11	Innre Cylinder	137.6 Kg
12	Piston	626.3 Kg
13	Piston Case	1797 Kg
14	Piston Retaining Ring	0.4 Kg
15	Retainer Ring	42.3 Kg
16	“O”Ring	0.2 Kg
17	Adjuster Shim	15.4 Kg
18	Drive Chunk	240.4 Kg