Although the drill rod of a large-aperture dth boring machine has a large diameter and good rigidity, due to the gravity of the drill rod and the drill bit, as the drilling depth increases, the drill bit will inevitably sag. When the wire saw machine cuts and separates the detached body with three free surfaces, in order to pass the wire rope, it is usually necessary to drill two horizontal holes and one vertical hole to meet the three holes. If the depths of the two horizontal boreholes are the same, the drill bit sag of the two boreholes is equal, regardless of the influence of other factors, the intersection of the three holes is possible. If the depths of the two horizontal holes are not equal, the deep hole drill will sag more than the shallow horizontal hole. If it is not corrected, the two horizontal holes cannot meet, or the three holes cannot meet at the same point. When using standard drill rod hand-held rock drills to drill horizontal holes, the droop correction amount of the drill bit must also be considered. The empirical coefficient correction method can be used to correct the droop deviation of the horizontal drilling bit.
Product details
Original: Quanzhou, China
Certification: ISO9001,CE, SGS and etc.
Price: Negotiable
Voltage: 380V 50Hz, the voltage can be as local demand
Payment term: TT, LC
Delivery date: Negotiable
Packing: export standard
Market: Southeast Asia/Middle East/ Africa/South America/Europe/North America
Warranty: 1 year
MOQ: 1 set
DTH Boring Machine – Down-the-Hole Quarry Drilling Rig
A DTH boring machine (Down-the-Hole drilling machine) is a specialized quarry drilling rig designed to create precise holes in hard rock for stone quarrying, blasting, wire saw entry, and anchor applications. Unlike traditional top-hammer drills, DTH technology delivers impact energy directly at the drill bit, making it highly efficient for hard rock and deep drilling tasks.
What Is a DTH Boring Machine?
The DTH boring machine is a heavy-duty drilling rig used to drill vertical, horizontal, or inclined holes in rock strata. It typically uses a DTH hammer and button bit that crush rock through percussion from within the borehole. This approach ensures a strong, direct impact force, enabling high penetration rates even in the toughest rock formations such as granite, basalt, and limestone.
Key Features & Benefits
⚙️ Efficient Down-the-Hole Impact Drilling
The hammer is positioned directly behind the drill bit, transmitting energy with minimal loss. This design delivers high drilling speed, low energy consumption, and superior penetration performance in abrasive and hard rock conditions.
📏 Multiple Drilling Orientations
DTH boring machines can drill:
Vertical holes
Horizontal holes
Inclined bores
This versatility makes them ideal for wire saw entry holes, blast hole placement, anchor drilling, and complex quarry layouts.
💪 Durable Structure for Demanding Sites
Built with high-strength steel, reinforced frames, and wear-resistant components, these machines withstand harsh quarry environments while minimizing downtime and maintenance costs.
🛠️ Stable, Straight, Accurate Drilling
With a robust frame and alignment system, DTH rigs ensure precise, straight boreholes, which are critical for efficient blasting, clean block extraction, and accurate anchoring operations.
⚡ High Penetration and Productivity
Because the hammer delivers impact at the bottom of the hole, DTH machines typically outperform rotary or top-hammer drills, especially in medium- to high-hardness rock types.
Typical Applications
DTH boring machines are widely used in:
🪨 Stone Quarrying
Drilling holes for diamond wire saw entry
Pre-splitting and blast hole drilling
Bench and face drilling for block extraction
👷♂️ Mining & Construction
Open-pit mining boreholes
Anchor hole drilling for slope or tunnel stabilization
Foundation and piling operations
🪛 Specialized Engineering Tasks
Horizontal directional drilling for utilities
Deep hole drilling for water wells or geothermal systems (depending on configuration)
Why Choose a ToolWits DTH Boring Machine?
ToolWits DTH boring machines are engineered for industrial-grade drilling efficiency and consistent performance across challenging rock conditions. With strict quality control and durable construction, these machines provide:
✅ Faster drilling speeds and higher productivity
✅ Longer drill bit and rod service life
✅ Lower operating costs per drilled meter
✅ Multi-angle hole capability for diverse quarry layouts
✅ Enhanced accuracy for blasting and block extraction planning
Whether you're drilling holes for diamond wire saw cutting or preparing blast patterns in a granite quarry, ToolWits DTH drilling rigs deliver reliability and performance you can count on.
FAQ – DTH Boring Machine
Q1: What rock types can DTH boring machines handle?
DTH rigs are suitable for hard rock species like granite, basalt, marble, limestone, sandstone, and other high-strength formations.
Q2: How does DTH drilling compare to traditional rotary drilling?
DTH drilling places the hammer at the bottom of the hole, delivering direct impact energy with minimal energy loss-resulting in faster penetration and straighter holes compared to surface-driven rotary systems.
Q3: Can these machines drill deep underground holes?
Yes. Depending on model and configuration, DTH boring machines can drill deep vertical or inclined holes suitable for mining, water wells, and other industrial applications.
Details of dth boring machine
Application
Packing, Storage, Handling and Transportation
DTH Drilling Machine is packed in polywood case before delivery. It is electronic product, should be stored in a suitable clean and dry place. Storage conditions should preferably be a sheltered environment with limited temperature -15-43 and low humidity levels.
After sales service team
Technical Team
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