In theory, the more the number of cutting edges of the whole hard milling cutter, the higher its rigidity, the smaller the average cutting amount of the single edge, and the smaller the cutting resistance. The more the number of blades, the vibration and noise during cutting will be reduced, the accuracy of the product and the surface quality after processing will be better, and the life of the milling cutter will be extended accordingly with respect to the tool with less blades. Does that mean that we have to choose the milling cutter in the direction of the number of edges? The answer is no, we still have to choose according to the material and process.

For high hardness and high precision machining, we still recommend to choose a multi-edged whole hard milling cutter, and the soft material should be as few as possible. According to the number of edges, single-edged milling cutters are generally made of non-metallic materials such as acrylic. The lower knife should be sharp, cut quickly, and the cutting force is small.

Two-edge milling cutters, from a practical point of view, are actually used less and less. Generally, they are slotted for the most common steel parts. A feed in the vertical direction is also better for chip removal.

Three-edge milling cutters are basically only used to make aluminum parts with more knives, such as non-ferrous metal processing, large rear angle and large spiral groove design, and sharp teeth. They should not only ensure the cutting efficiency, but also ensure the surface quality after processing, and at the same time, they should have space for chips, which is suitable for ring milling or side milling. In fact, the 3-edge milling cutter can also feed vertically, but many manufacturers are not willing to cut the edge like this, which may be more troublesome.

The amount of 4-edge milling cutter is the largest and most common now. Now the processing equipment is getting better and better. It is necessary to ensure the processing efficiency and have certain chip removal performance. The milling of common steel parts accounts for more, which is the best choice. It can realize vertical feed.

The cost of a six-edged milling cutter is relatively high and the dosage is relatively small. First of all, its chip space is small, the more the number of blades, the worse the chip removal, generally for high-precision processing of high-hardness materials, there are corresponding requirements for machine tools.

For heavy-duty cutting and high-efficiency cutting, try to choose a tool holder with strong clamping force, such as a strong tool holder or a heat-shrinkable tool holder. The clamping capacity is as short as possible, otherwise it is easy to produce vibrating tool to let the tool and even break the tool.

A brief summary; 1, the blade is less rough, the blade is more finishing; 2, aluminum alloy non-ferrous metal cutting tools, generally not more than three blades; 3. At present, the amount of four-edge milling cutters is the largest, and rough and fine machining can be done in many cases, which is more common.