How Does Tapered Rock Drilling Tools Work?

Tapered button bit,also known as taper drill bit, is a drilling tool which has a wide applications such as mines, tunnels, and construction engineering. Its design is mainly for drilling holes in rock drilling and blasting operations, usually in conjunction with handheld or mechanical rock drills.

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Introduction of Tapered button bit

Features A:

• Tapered interface: The interface part of the drill bit is conical, which allows the drill bit connect with drill rod firmly . It greatly reduce looseness during the drilling process.
• High strength materials: Since the drill bit needs to drill holes in hard rock, it usually use high-strength alloy steel. Moreover,heat-treated treatment of drill bits will improve wear resistance and strength.

Features B:

• Different head design: The head design of the tapered bits including cross, button and chisel, These designs can meet the needs of different application scenarios and provide different drilling effects.
• Impact resistance: The button bits need to withstand high-intensity impact and vibration during rock drilling. Therefore,their design must have sufficient impact resistance to ensure stability in high load working environment.

Applications

Due to its unique tapered design and high-strength materials,the taper button bits performs well in many harsh applications. Such as mining, tunnel construction, geological exploration, construction engineering, hydropower engineering, railway and highway construction. Besides, it can also work in municipal engineering, environmental protection engineering, etc.

As a professional rock drilling tool manufacturer, our company produces taper rock drill bits in various specifications and types.Which including different taper angles, tooth shapes, diameters and lengths, etc. These changes make the drill suitable for a variety of applications. Below is the specifications of the button drill bits:

Bit Diameter Button Number Angle(°) Length (mm) inch (pieces) (mm) 28 11/8″ 4 7°111°/12° 50-65 30 1  3/16″ 4~6 7°111°/12° 50-65 32 11/4″ 4~7 7°/11°/12° 50-65 34 111/32″ 4~8 7°/11°/12° 50-65 35 13/8″ 7~8 7°111°/12° 50-65 36 113/32″ 4~8 7°/11°/12° 50-65 38 11/2″ 4~8 7°/11°/12° 50-65 40 19/16″ 4~8 7°111°/12° 50-65 41 15/8″ 4~8 7°/11°/12° 50-65 42 121/32″ 4~8 7°/11°/12° 50-65

We not only providing high-quality products, but also providing comprehensive technical support and after-sales service. Including product maintenance and operation training to ensure customers can make full use of the product.

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The taper drill rod, also known as pneumatic drill rod or finished drill rod, is a main rock drilling tool used in the fields of mining, tunnel and quarrying. Generally working with hand-held, air-leg type pneumatic rock drills and hydraulic drills. The taper rod consists of a cone, a rod body, a collar and an impact end.

Introduction of Taper drill rod

Raw Material

The material of tapered drill pipe plays a key role in its manufacture. As the drill pipe needs to withstand extremely high pressures and torques during drilling while also resisting friction and wear. Therefore, the selection of high-quality materials is an important factor in ensuring the performance and life of taper drill steel.

The commonly used material for the drill rods is high-strength alloy steel. This type of steel contains appropriate amounts of carbon and alloying elements such as chromium, nickel, molybdenum, etc. It has high strength, high toughness and wear resistance. Therefore, these properties enable drill pipe to withstand the high pressures, high torques and mechanical stresses experienced during drilling.

Production Process

The production process of the tapered connecting drill rod is as follows:

1. Inspection – straightening – hole expansion, sizing and shaping – head chamfering – extrusion of the collar – processing of taper end. After that,the semi-finished products is ready.
2. Inspection of semi-finished product,inspection and straightening of them one by one.
3. Heat treatment,including quenching and tempering of the shank,tempering of taper end.
4. After that,surface treatment like surface shot blasting and strengthening, as well as surface anti-corrosion treatment.
5. Finally,quality inspection, packaging and warehousing.

Tapered drill steel are available in different specifications and designs, suitable for various drilling and crushing needs. Common tapers are 7 degrees, 11 degrees and 12 degrees. Each taper corresponds to different application scenarios and supporting equipment. And the length vary from 400-mm.

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