Woodworking router bits ( milling cutter ) is a rotary cutter with one or more cutting edges, which is mainly used for woodworking milling processing. When the cutter body rotates, the machined object does not rotate, and the cutter teeth intermittently cut off the redundant wood in turn, similar to metal cutting milling cutter.
Structure of woodworking milling cutter
Chip evacuation groove: the groove of the milling head is a deep spiral groove running along with the cutter, while the sharp blade along the edge of the groove is called the blade. The cutting edge cuts the material, and the chip of the material pushes the chip discharge slot through the rotating drill bit. Each chip chute has almost always had a blade, but some cutters have two blades per chip chute. Generally, the chip chute and blade can be used interchangeably. Milling cutters may have one to more blades, and two, three, and four are the most common. Usually, the more teeth the blade has, it can remove the material faster. Therefore, the 4-tooth cutter can cut materials at twice the speed of the 2-tooth cutter.
Helix angle: the groove of the milling cutter is almost always spiral. If the chip chute is straight, the entire blade will immediately impact the material, causing vibration, reducing accuracy and surface quality. The chip discharge slot can be set at a certain angle to make the blade gradually enter the material and reduce the vibration. Usually, the finishing tool has a higher spiral angle to get better machining.
Router bits handle: a handle is a cylindrical (non-groove) part of a tool that is used to secure and position it in the tool holder. The handle can be completely circular and held by friction or may have a welding plane, where the set screw is also called a headless screw that contacts without tool sliding to increase torque. The diameter may be different from the diameter of the cutting part of the tool, so it can be maintained by a standard tool clamp.
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