Rock Drilling DTH Hammer

 

 

A Rock Drilling DTH Hammer is a specialized tool used in the mining, construction, and drilling industries to facilitate rock drilling. It's designed to create a hole in the ground or solid rock by using high-frequency, high-impact blows to the drill bit. Rock Drilling DTH Hammers are commonly used in various applications, including drilling blast holes, water wells, geothermal wells, and exploration drilling.

 

Here's how a Rock Drilling DTH Hammer works and some key features:

 

Working Principle: The Rock Drilling DTH Hammer is attached to the end of a drill string and is powered by compressed air. As the compressed air is forced down the drill string, it enters the Rock Drilling DTH Hammer at high pressure. This air pressure drives a piston inside the hammer, which strikes the back end of the drill bit. The impact energy is transferred to the bit's cutting edge, breaking the rock or ground material. The cuttings are then flushed out of the hole by the air, allowing the drilling process to continue.

 

Components: A typical Rock Drilling DTH Hammer consists of several key components:

 

• Outer Casing: Houses the internal components and helps direct the air and cuttings out of the hole.
• Piston: Driven by compressed air, strikes the back of the bit.
• Valve System: Controls the airflow and impact mechanism within the hammer.
• Bit: The cutting element that directly interacts with the rock.
• Chuck: Holds the bit in place and allows for quick bit changes.

 

Advantages:

 

• High Penetration Rate: Rock Drilling DTH Hammers are known for their fast drilling speeds, making them efficient for many applications.
• Suitable for Hard Rock: Rock Drilling DTH Hammers are particularly effective in drilling through hard and abrasive rock formations.
• Minimal Deviation: The direct impact method of drilling reduces the risk of deviation from the desired drilling path.
• Versatility: Rock Drilling DTH Hammer can be used in various drilling applications and can accommodate different bit sizes and types.
• Disadvantages:
• Air Supply: Rock Drilling DTH Hammers require a consistent supply of high-pressure compressed air, which can be challenging in some environments.
• Depth Limitations: In very deep drilling, the weight of the drill string can limit the efficiency of DTH hammers.

 

Applications:

 

• Mining: Used for creating blast holes, extracting minerals, and exploration drilling.
• Construction: Drilling holes for foundations, piers, and other structural elements.
• Water Wells: Used to create boreholes for accessing underground water sources.
• Geothermal Wells: Drilling for harnessing geothermal energy.
• Exploration: Used in oil and gas exploration, as well as in geological surveys.

 

 

 

 

Technical Parameters Of NUMA100 DTH Hammers

 

Bit Shank	NUMA100
Hole Range	Φ254-305mm
Connection Thread	API 4 1/2" Reg API 5 1/2" Reg
Working Pressure	10-25Bar / 1-2.5Mpa
Speed Recommend	15-35rpm
Pull Force Recommend	19KN
Length	1441mm
Weight	308kg

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Technical Parameters Of NUMA100 DTH Bits

Diameter		Gauge Buttons	Front Buttons				Weight(KG)	Part Number
mm	Inch		Flat Face	Convex Face	Concave Face	Face Type
254	10	Φ19*12	Φ16*12	Φ18*8	Φ16*6	Concave Face	88.4	LN-NUMA100-254CC
275	10 5/6	Φ19*12	Φ16*12	Φ18*8	Φ16*8	Concave Face	92.5	LN-NUMA100-275CC
305	12	Φ19*15	Φ18*15	Φ18*12	Φ16*9	Concave Face	105.0	LN-NUMA100-305CC