85178379
STARTING EXTENSION
The 851 783 79 STRAIGHT EXTENSION, LONG is a crucial drill string component designed to extend the reach of your underground drilling operations. It connects the drifter to the drill bit, ensuring efficient transfer of impact and rotation energy for productive rock excavation.
Description
851 783 79 STRAIGHT EXTENSION, LONG An extension rod plays a vital role in the drill string, serving as the link between the drifter and the drill bit. It allows the rig to reach deeper into the rock face, enabling longer holes with fewer rod…
Full Technical Description
851 783 79 STRAIGHT EXTENSION, LONG An extension rod plays a vital role in the drill string, serving as the link between the drifter and the drill bit. It allows the rig to reach deeper into the rock face, enabling longer holes with fewer rod changes. These rods are engineered to withstand the intense forces of percussion and rotation, transmitting energy efficiently from the drifter's piston to the rock-breaking bit. Proper energy transfer is essential for maintaining high penetration rates and overall drilling productivity.
The integrity of a drill extension directly impacts safety and operational reliability. A worn or damaged extension can lead to significant energy loss, reducing drilling speed and increasing fuel consumption. More critically, a compromised rod can break during operation, potentially causing costly downtime, leaving tools in the hole, or even creating a safety hazard for personnel. Choosing high-quality extensions helps maintain straight holes and reduces vibration, contributing to longer service life for other drill string components and the drifter itself.
Common signs of a failing extension include a noticeable drop in penetration rate, excessive vibration during drilling, or difficulty in coupling and uncoupling rods. Visually inspect rods regularly for bending, cracks, or severe thread wear. When threads become worn or the rod shows signs of fatigue, it's time for replacement. Timely replacement prevents premature failure of other drill string components and ensures consistent drilling performance.
Applications
- Underground drilling jumbos
- Mining and tunneling
- Hydraulic control systems
- Rock drilling spare parts
Specifications
| Brand | Sandvik |
|---|---|
| Machine Type | DX700 |
| Assembly | (3-550 763 49) LUBRICATION DIA |
Used on machines
Brand
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