What is The CNC Router Bits
CNC router bit is the most critical tool for CNC router machine to realize cutting, engraving, punching and other processes. The CNC router bit determines the type of processing you can complete and the quality of the final design. If there is no CNC router bit, then your CNC router machine cannot work.
The CNC router bit is divided into many types, and different cutting processes require different tools. If your project involves not only cutting, but also 2D and 3D engraving, punching, etc., do you know which CNC router bits you should choose? What should be considered when buying and using this type of CNC router bit? Next BuyCNC will provide you with a complete introduction about CNC router bit, such as what is CNC router bit. The CNC router bit is a cutting tool installed on CNC router machine for engraving and cutting work pieces. These cutting tools are collectively called CNC router bit,CNC router cutters, router machine bits, CNC engraving bits etc. CNC router bits of different types can achieve different processes.
The most widely used CNC router bits in the market:
1. Flat-bottomed engraving CNC router bit, also called column knives, mainly rely on the side edge for carving, and the bottom edge is mainly used for flat polishing. The end face of the head of the column bits is large, and the engraving efficiency is high. It is mainly used for contour cutting, milling plane, area rough carving, rough surface carving, etc.
2. Ball-end engraving CNC router bits, the cutting edge of the ball knife is arc-shaped, forming a hemisphere during the engraving process of the woodworking engraving machine, the engraving process is evenly stressed and the cutting is stable. So it is especially suitable for curved surface carving, often used for curved surface semi-precision carving and curved surface fine carving. Ball cutters are not suitable for milling planes.
3. Bull-nose engraving CNC router bit. Bull-nose router bits is a mixture of column knife and ball knife. On the one hand, it has the characteristics of a ball knife to carve curved surfaces, and on the other hand, it has the characteristics of a column knife and can be used for plane milling.
4. Taper flat-bottomed engraving CNC router bit, referred to as taper router bits. Cone knives have the widest application range in the entire engraving industry. The bottom edge of the cone bit, commonly known as the tip, is similar to a column router bits, and can be used for small plane finishing. The side edge of the cone router bit is inclined at a certain angle to form an inclined side surface during the engraving process. The structural characteristics of the cone knife can enable it to achieve the unique three-dimensional angle clearing effect of the carving industry. Cone knives are mainly used for single-line carving, regional rough carving, regional fine carving, three-dimensional clear corners, projection carving, image gray scale carving, etc.
5. Taper ball-end CNC router bits, referred to as taper ball router bits. The cone ball router bits is a mixture of cone bit and ball bit. On the one hand, it has the characteristics of a cone knife with a small tip, and on the other hand, it has the characteristics of a ball knife, which can engrave relatively fine curved surfaces. Cone ball knives are often used for relief surface carving, projection carving, image relief carving, etc.
6. Taper bull nose CNC router bits, taper bull nose CNC router bits is a mixture of cone bit and bull nose bit. On the one hand, it has the characteristics of a cone knife, which can have a smaller tip, engraving and milling relatively fine curved surfaces, and on the other hand, it has a bull nose knife. Because of its characteristics, the taper bull-nose knife is often used for relief surface carving.
7. The big head engraving CNC router bit is essentially a cone router bit with a larger head cone angle. Mainly used for three-dimensional angle clearing.
8. Drilling tool, mainly used for drilling. When the hole is shallow, you can use a flat-bottomed knife to drill.
The above are some of our most common Engraving CNC router bits. So do you know what materials these CNC routers bits are suitable for processing and what features they have?
The Features and applicable materials of the CNC router bits
1.Single flute spiral router bit (carbide)
Main function: two-dimensional cutting
Applicable materials: acrylic, PVC, medium density board
Features: Combining the advantages of single groove design with strong cutting force and smooth chip removal, and spiral cutting to ensure the smoothness of the cutting surface, it has a good working efficiency in batch processing of PVC and MDF.
2.Double-edged spiral router bit (hard alloy)
Main performance: two-dimensional cutting, two-dimensional carving
Applicable material: natural wood, synthetic wood can also be used for plastic
Features: Special wood processing tools. This type of double J tool is used to process wood and synthetic wood. It is easy to remove debris, the blade is strong, durable, and the processing effect is good (to ensure that the surface is free of burrs).
3.Single-edged straight groove CNC router bits(carbide)
Main performance: two-dimensional cutting
Applicable material: cork, medium density and medium hardness wood, also can be used for: elastic, anti-friction plastic
Features: Combines slotting design and single-edge geometric design, which is convenient for automatic chip removal during fast cutting
4.ball end engraving CNC router bits (hard alloy)
Main performance: three-dimensional engraving, two-dimensional cutting
Applicable material: organic (acrylic) can also be used: black metal.
Features: The choice of the blade width of the ball milling cutter mainly depends on the accuracy and size of the surface carving. It is generally divided into two engravings. For rough carving, you can choose a larger tool diameter, and for fine carving, you should choose a tool with a smaller blade diameter.
5.double-edged straight groove engraving CNC router bits (hard alloy)
Main performance: two-dimensional plane carving, two-dimensional cutting.
Applicable materials: medium density fiberboard, hardwood, acrylic
Features: Designed for CNC engraving MDF material, combined with special hard alloy, hard blade body and advanced blade geometry, durable. It also has a high work efficiency in the rough machining of non-ferrous metals.
6.Surface cleaning CNC router bits(carbide)
Main performance: clean the surface of the product
Applicable materials: organic (acrylic), PVC, medium density board
Features: When any engraving machine is working, it is necessary to ensure that the engraving plane is flat, especially when performing 2D and 3D engraving. In order to save trouble, some sculptors tend to be sloppy. The products they engrave are either substandard or require manual modification.
7.Single edge column router bits (carbide)
Main performance: two-dimensional cutting
Applicable material: two-color board, plastic board, also can be used: acrylic board with thickness below 3mm.
Features: For cutting two-color boards, if there is no special requirement, you can usually cut the finished product when you pick it up, but the sharp knife is easy to dull after cutting, and there will be burrs after engraving. The design principle of a single-edged column knife is similar to that of a sharp knife, but it is Vertical cutting, no slope, especially suitable for the design of inlay process.
8.Double-edged spiral router bit(carbide)
Main functions: two-dimensional cutting, two-dimensional plane carving.
Applicable material: organic (acrylic), PVC, also can be used for: black metal.
Features: It has good red resistance and abrasion resistance for dry cutting of organic plates, and the spiral blade cutting ensures the smoothness of the surface of the object. It has excellent performance when cutting thicker plates. It can also be used to process ferrous metals, such as iron and steel.
9.3D Carving router bits (Carbide)
Main functions: three-dimensional corner clearing, chamfering
Applicable material: organic, PVC． Can also be used for: MDF, medium hardness wood
Matters needing attention: Whether it is engraving or reverse engraving, be sure to keep the engraving plane flat; it is very important to choose a suitable blade width for three-dimensional clear-angle engraving. It is recommended that the blade width of small-format engraving machine should not exceed 22mm, and that of large-format engraving machine A tool with appropriate blade width can speed up the engraving speed.
The quality of the engraved workpiece of the CNC engraving machine is not only determined by the performance of the engraving machine itself, but also affected by many external factors. For example, the experience of operator and can you choose the right CNC router bits according to the material?.Now Let’s learn how to choose the suitable engraving CNC router bits type and spiral router bit.