DTH Hammer Threaded Connection Tightening Issues and Solutions
During drilling operations, the threaded connections between the driver chuck and top sub may become excessively tightened due to high tension. While operators can initially attempt to disengage hammer threads directly on the rig, persistent thread locking or seizure requires the use of a dedicated **breakout bench** for controlled disassembly.
Modular Breakout Bench Features
This compact yet high-power breakout bench is designed for portability and can be deployed in workshop or containerized environments. It supports disassembly of DTH hammers within a 3″–10″ diameter range Key considerations for equipment selection include:
1. Voltage compatibility
2. Power source type (electric/hydraulic)
Specification parameters
How to use DTH Hammer breakout bench equipment?
1.Put hammer on the bench.
2. Fix K-shaped base with nut.
Note: Please make sure red point on the K-shaped base and red point on the bolt are at the same side.
3.Adjust the position of hammer and wrench;
Use wrench to block the wrench flat of hammer;
Let wrench and jack in the same face.
4.Fix wrench.
5. Shake handle of Jack slowly till top sub away from hammer
6.After top sub dismantled, release pressure of Jack and put hammer on the bench like above photo to dismantle drive chuck of hammer.
7. Fix K-shaped base with nut.
Note: Please make sure red point on the K-shaped base and red point on the bolt are at the same side
8. Fix hammer
9. Adjust the position of hammer and wrench;
Use wrench to block the wrench flat of hammer;
Let wrench and jack in the same face.
10. Shake handle of Jack slowly till dive chuck away from hammer.
As a reaming drilling tools, domed button bits are used when a large diameter is needed to be reamed out after a pilot holes is drilled to a depth.
SHANDIKE Domed Button Bits
Domed button bits as one of the reaming drilling tools are used when a large diameter is needed to be reamed out after a pilot hole is drilled to a depth.
Parameters
• Thread size: R28, SSR28, R32, SSR32, R35, SSR35, R38, T38, T45, and T51.
• Diameter: 76mm to 152mm.
Features
• Alloy buttons are hot mounted into the drill bit, ensuring the bit good accuracy and durability;
• Reliability ensured by premium drill bit materials and premium alloy button;
• Different types designed for different drilling scenarios and rock conditions;
• High speed and drilling efficiency;
• Cost-effective, good performance with reasonable price.
Applications
Drilling works for blasting duties in tunneling, construction, mining, quarrying, etc.
 |  |
| Thread Domed Button Bit | |
R32 Thread Domed Button Bits
Diameter | T.C(Tungsten Carbide) Buttons | Flushing Hole | Angle | |||
mm | inch | Gauge x mm | Front x mm | Side | Front | Gauge |
76 | 3 | 9 x 13 | 1 x 13 | 1 | 3 | 35° |
89 | 3 1/2 | 14 x 13 | 1 x 13 | 2 | 2 | 35° |
102 | 4 | 16 x 13 | 1 x 13 | 2 | 2 | 35° |
127 | 5 | 18 x 13 | 1 x 13 | 1 | 3 | 35° |
The ZWY-80L crawler-type mucking loader is a high-efficiency loading machine specially designed for small and medium-sized mining sites, suitable for tunnel working spaces with a slope of 0–30 degrees. It features reasonable structural design, stable performance, flexible operation, and convenient maintenance, which significantly reduces labor demand and improves mining efficiency.
The machine adopts crawler-type propulsion and is equipped with an imported hydraulic pilot operating system, supporting multiple functions such as excavation, gathering, loading, and bottom cleaning. The main power source is a three-phase AC power supply, offering low noise and easy operation.
Suitable for small and medium-sized mining sites with working space slopes of 0–30 degrees, especially in mining environments with narrow tunnel cross-sections and limited operating conditions.
| No. | Project | Unit | Main Parameter |
|---|---|---|---|
| 1 | Complete machine quality | kg | 7800 ± 100 |
| 2 | Minimum turning radius | m | ≤ 8 |
| 3 | Excavation width | mm | ≥ 2900 |
| 4 | Excavation height | mm | ≥ 1900 |
| 5 | Digging depth | mm | ≥ 700 |
| 6 | Digging distance (from shovel mouth) | mm | ≥ 1900 |
| 7 | Discharge height | mm | 1700-2300 (extendable) |
| 8 | Unloading distance | mm | 1700 |
| 9 | Climbing ability | (°) | ≤ 0-30 |
| 10 | Scraper conveyor speed | m/min | 0.63 |
| 11 | Traveling speed | km/h | 1.1 ± 5% |
| 12 | Ground clearance | mm | ≥ 230 |
| 13 | Rated working pressure | MPa | 30 |
| 14 | Boom swing angle | (°) | ± 73 |
| 15 | Total motor power | kW | 15 + 15 |
| 16 | Max. material passing size (W × H) | mm | 650 × 750 |
| 17 | Min. tunnel section (W × H) | m | 2.3 × 2.5 |
| 18 | Overall dimensions (L × W × H) | mm | 7300 × 2000 × 2100 |
| 19 | Loading capacity | m³ | 120 |
