Carbide drill bits are equipment used in drilling operations. Carbide roller cone bits are widely used for drilling in rock formations such as oil wells, open-pit iron mines, non-ferrous metal mines, and coal mines, as well as in fields such as hydropower, railways, and mine shafts.
Solid carbide drill bits are characterized by high strength, high hardness, fast cutting speeds, wear resistance, and good thermal stability. Based on structure, they can be classified into hollow-body, deep-hole, and roller cone types. Solid carbide drill bits are ground from a single solid carbide bar and can be categorized into external-cooled and internal-cooled types based on their cooling structure.
Carbide drill bits are tools used in drilling operations, with hard alloy materials such as tungsten carbide serving as the primary cutting components. Based on structure, they are primarily classified into drills with brazed carbide cutting tools and solid carbide drills.
The commonly used roller cone drills are mostly three-cone drills. The characteristics of this type of drill include a wide and uniform distribution of axial pressure and impact loads, as well as the ability to fully utilize the effective space, resulting in smooth drilling. The dimensions and shapes of the cemented carbide teeth used in roller cone bits must be suited to the characteristics of the rock; they require good wear resistance, high strength, and resistance to fracturing and breaking.
The main types of cemented carbide ball teeth used in roller cone bits include: spherical teeth, conical button, wedge-shaped insert, side-wedge button, and flat-top teeth used for the back of the cone and the tips of the claws.
Carbide drill bits are classified into four basic types: solid carbide drill bits, carbide indexable insert drill bits, brazed carbide drill bits, and replaceable carbide tooth crown drill bits. Each type offers advantages suited to specific machining conditions.
Applications and Features
1. Suitable for drilling complex materials, allowing for higher cutting speeds.
2. Effectively reduces chipping and offers excellent wear resistance.
3. Multi-layer geometric cutting edges improve chip evacuation and maintain low cutting resistance.
4. In addition to the commonly used square shank, a variety of shank types are available to suit various drilling machines and drill presses.
5. Furthermore, compared to indexable insert drills, solid carbide drills can be reground 7 to 10 times.
Classification and Grades
YG3X (K01) Hardness≥91.5 Offers the best wear resistance among tungsten-cobalt-titanium alloys, but has relatively poor impact toughness. Suitable for high-speed finishing of small cross-sections in cast iron, non-ferrous metals and their alloys, quenched and tempered steel, and alloy steel.
YG3 (K05) Hardness≥90.5 Its wear resistance is second only to YG3X. It is sensitive to impact and vibration and is suitable for finishing and semi-finishing during continuous cutting of cast iron, non-ferrous metals, and their alloys, as well as for thread finishing and reaming.
YG6A (K10) Hardness≥91.5 A fine-grained alloy with good wear resistance, suitable for semi-finishing of cold-hardened cast iron, non-ferrous metals, and their alloys, as well as for semi-finishing and finishing of quenched and tempered steel and alloy steel.
YG6 (K15K20) Hardness≥90 It has relatively high wear resistance, though lower than YG3, and better resistance to impact and vibration than YG3X. Suitable for semi-finishing and finishing at moderate cutting speeds for cast iron, non-ferrous metals and their alloys, and non-metallic materials.
YG8 (K30) Hardness≥89.5 High working strength; better impact and vibration resistance than YG6, but lower wear resistance and permissible cutting speed. Suitable for low-speed rough machining of cast iron, non-ferrous metals and their alloys, and non-metallic materials.
K0 Type: Used for setting in straight-type carbide inserts (24, 26, 28, 30, 32, 34, 36, 38, 40, 42, etc.),
T3 Type: Used for setting in carbide drill bits for rotary drilling of rock formations (T308, T310, T313),
T1 Type: Used for setting in rotary drilling bits for medium-hard rock formations (T105, T108, T110)
K1 Type: Used for setting in cross-shaped and X-shaped carbide inserts (K117, K119, K120, K122, K124, K12)
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