Cutting tool tungsten carbide rods refer to rod-shaped materials manufactured through the powder metallurgy process using tungsten carbide (WC) as the hard phase and cobalt (Co) as the binder phase. After subsequent processing procedures such as grinding, fluting, and coating, they can be made into various cutting tools.
CTIA GROUP and its parent company, CHINATUNGSTEN ONLINE, have been dedicated to the tungsten-molybdenum products industry for nearly 30 years. They specialize in providing flexible, customized global services for tungsten-molybdenum products, designing, manufacturing, and precisely processing various standard specifications, grades, and dimensional precision according to customer requirements, suitable for a wide range of applications. For more information on tungsten carbide, please visit the website: http://www.tungsten-carbide.com.cn/index.html. If you require tungsten carbide, please contact CTIA GROUP: sales@chinatungsten.com, 0592-5129595.
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I. Tungsten Carbide Rods for Drilling Tools
Drilling is one of the major application fields of tungsten carbide rods. Drill bits manufactured using tungsten carbide rods as the substrate include twist drills, step drills, center drills, deep-hole drills, and micro drills. Among them, rods with one or two straight coolant holes are suitable for manufacturing internal-cooling drills and can be used in deep-hole machining applications; rods with helical coolant holes are suitable for higher-efficiency cutting scenarios. In the printed circuit board (PCB) processing field, micro drills are an important application direction of tungsten carbide rods. Rods used for manufacturing micro drills generally adopt ultra-fine grain or nano-grain tungsten carbide.
According to industry technical data, solid tungsten carbide drills exhibit good performance in high-speed drilling operations and are suitable for drilling aluminum alloys, cast iron, and steel materials. In industries such as automotive, mold manufacturing, and electronics, tungsten carbide drills are commonly used tools for large-scale drilling tasks.
II. Tungsten Carbide Rods for Milling Tools
Milling is a cutting tool category that consumes a relatively large volume of tungsten carbide rods. End mills manufactured using tungsten carbide rods as the substrate include square end mills, ball nose end mills, roughing end mills, and high-helix end mills. These products are suitable for CNC milling, slot milling, and surface machining processes and are widely used in the machining and manufacturing of automotive components, mold cavities, and general mechanical parts.
According to industry information, ultra-fine grain or submicron grain tungsten carbide rods are suitable for high-speed finishing applications and can achieve good surface finish and dimensional accuracy under high-speed conditions. Tungsten carbide end mills with physical vapor deposition coatings are suitable for dry cutting or high-speed cutting applications.
III. Tungsten Carbide Rods for Reaming Tools
Reaming is an important hole-finishing process, and tungsten carbide rods are used in this field for manufacturing solid tungsten carbide reamers. Reamers are applied in the machining of precision holes in components such as automotive engine blocks and cylinder heads. Compared with high-speed steel reamers, tungsten carbide reamers can maintain hole diameter stability at higher cutting speeds, helping to ensure hole surface finish quality.
According to industry product information, grade YG10X (10% cobalt content, hardness HRA91.8–92.2, transverse rupture strength not less than 3600 N/mm2) is suitable for manufacturing reamers and other finishing tools. Grade TF10 (approximately 10% cobalt content, hardness HRA92, transverse rupture strength 3600 N/mm2) can be used for manufacturing small-diameter micro drills, watchmaking tools, solid end mills, and solid reamers, among other precision tools.
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IV. Tungsten Carbide Rods for Rotary Burrs and Micro-Machining Tools
Rotary burrs are rotary tools used for deburring, weld seam finishing, and profile grinding, and tungsten carbide rotary burrs are their primary application form. These tools are suitable for auxiliary operations in mold manufacturing, automotive component finishing, and mechanical machining.
In the field of micro-machining, tungsten carbide rods are used to manufacture precision tools such as PCB micro drills, engraving cutters, and micro end mills. These tools are generally manufactured from ultra-fine grain or nano-grain tungsten carbide rods. The rod diameter can be less than 3 mm, and some micro tools can have diameters below 0.25 mm.
V. Selection Principles for Tungsten Carbide Rods Used in Cutting Tools
In practical applications, the selection of tungsten carbide rods for cutting tools should comprehensively consider factors such as the type of workpiece material, machining conditions, and equipment conditions. Generally, for finishing applications, grades with lower cobalt content (such as 6%), finer grain size (such as 0.4 μm to 0.8 μm), and higher hardness (HRA92 to 94) should be selected to meet wear resistance requirements. For applications involving interrupted cutting or impact loads, grades with higher cobalt content (such as 10% to 15%) and better toughness should be selected to reduce the risk of edge chipping.
Machining conditions (such as machine tool rigidity, cooling methods, and cutting parameters) also affect the performance of tungsten carbide cutting tools. During continuous cutting under stable conditions on CNC machine tools with good rigidity, the high-speed cutting potential of tungsten carbide tools can be effectively utilized. Under conditions involving significant vibration or insufficient clamping rigidity, it is recommended to select grades with higher toughness and appropriately adjust cutting parameters.
