Drilling tools used in mining, quarries, construction, and geotechnical engineering must ensure high performance and resistance to extremely harsh operating conditions. Depending on the type of work being performed, drilling technologies using either a top-hammer or bottom-hammer system are employed. Each of these methods requires appropriately selected equipment, which affects drilling efficiency, tool durability, and the pace of work.

What types of attachments are used with top-hammer tools?

The top-hammer method is one of the most commonly used drilling technologies in open-pit mines, underground mines, and quarries. In this system, the impact energy is transmitted from a hammer located on the surface through the entire drill string to the drill bit. This technology involves, among other things:

• drill rods,
• threaded crowns,
• sleeves,
• connectors,
• fasteners,
• tapered tools,
• monolithic drill bits.

Properly selected drill pipes and connection systems are of great importance, as they must effectively transfer impact energy when operating under extremely demanding conditions. Gonar offers solutions compatible with the leading models of drilling rigs used in the mining industry.

Tools with tapered shanks are also frequently used in quarry operations. These types of tools are particularly useful for drilling granite blocks. Our product line includes drill rods with 22x108 and 25x108 shanks, as well as tapered shanks with various specifications.

Drill bits are also an essential component of the equipment, as they are responsible for effectively crushing rock. The selection of the appropriate drill bit depends, among other things, on the type of substrate, the borehole diameter, and the operating conditions.

What accessories are used in bottom-hammer drilling?

Down-the-hole(DTH) technology is used primarily for drilling in hard and dense rock. In this case, the percussion mechanism is located directly above the drill bit, allowing energy to be transferred much more efficiently. Down-the-hole systems are primarily used for:

• recessed hammers,
• DTH laces,
• tubular poles,
• connectors,
• adapters,
• drilling string accessories.

Gonar offers down-the-hole hammers ranging in size from 3.5” to 6”, used in quarries and open-pit mines, among other applications.

DTH bits, which are available in various designs, are a very important piece of equipment, such as:

• Flat Face,
• Concave,
• Convex.

The specific types of drill bits are selected based on the type of rock and the expected drilling efficiency. The company offers drill bits with diameters ranging from 90 mm to 200 mm.

When drilling using the bottom-hammer method, special box-to-box, pin-to-box, and pin-to-pin connectors are also used to ensure proper connection of the drill string components.

Why is choosing the right drilling equipment so important?

Properly selected equipment directly affects work efficiency, tool life, and drilling safety . Improperly matched drill bits, drill rods, or connectors can lead to faster wear of working components, higher operating costs, and downtime during operations.

Gonar manufactures over 3,000 different tools and devices for the mining, construction, and geotechnical sectors. Our many years of experience and the development of our own technologies enable us to provide solutions tailored to our customers’ individual needs and various drilling methods.

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