![]() However, as with many hard materials, they can be brittle.Ĭarbide is a type of wear-resistant steel that works well for cutting materials like:ĭepending on the shape of the bit, solid carbide can be used for cutting, engraving, and milling among other things. Solid Carbide CNC bits are some of the harder bits on the market. Let’s take a closer look at the materials used to manufacture these bits. Not all bit types can cut every type of material, so you need to choose the right bit for your particular project. The market features a variety of types, each of which has different advantages and disadvantages. Speed rates are measured in revolutions per minute, and not all bits can maintain equal speeds.ĬNC bits don’t always consist of the same material. Speed Rate: How fast the spindle moves.If your chip load and feed rate don’t match up, you can easily damage your CNC bits. Feed rates are typically measured in inches or feet per minute. Feed Rate: How much lateral space your bit can process per minute.Smaller chip loads equate to more heat generation, while larger chip loads lead to the reverse. Chip Load: The chip load refers to the size of the material that the bit removes with every rotation.It’s worth noting that you can’t program the toolpath to go contrary to the machine’s axes. You get to program the toolpath into the software when you’re creating the design. Toolpath: The route the spindle follows to make cuts.If you work with CNC bits a lot, there are a couple of phrases you’ll hear a lot. How wide the flute part is at the bit’s surface.Įssential Terminology When Dealing with CNC Bits ![]() Web Thickness - How thick the bit is, i.e.Margin - How far the cutting edge (lip relief) extends beyond the web thickness.Land - Same as with the side, the raised part between the fluting.When you look at CNC bits from the front, the anatomy changes somewhat. It usually makes up the blade edge of the bit, allowing it to cut efficiently. Lip Relief - Lip relief refers to the amount of slant on the CNC bit’s tip.Unlike the flute, which removes loose material, the land helps provide the thrust needed to cut the material. It’s a raised ‘island’ between the flutes, which is likely where it gets its name. Land - The land part of CNC bits is the inverse of the flute.It’s often a critical criterion when buying bits, and most manufacturers list the flute length on product descriptions. Flute Length - The flute length is the overall amount of space that the flute fills on CNC bits.Pro Tip:More flutes equal a smoother cut, though it reduces the capacity for chip load. Straight flutes don’tremove material from the cut, but spiral flutes do. It then spins it backward till it ejects at the end of the flute length.įlutes can be either straight or spiral cut. Much like an earth auger or standard drill bit, the flute scoops up the material the bit removes. Without it, the bit couldn’t remove the material it cuts. Flute - The flute is the cutting edge of the CNC bit that recesses into the core.Most bits, whether they be drill bits or router bits, share the following parts: ![]() From CNC wood bits to carbide drilling bits, they mostly share the same basic structure. CNC Bits in Detail: Parts of a BitĬNC bits may be a relatively simple part of the routing process, but there’s more to them than meets the eye. Depending on the bit in use, you can cut, engrave, or mill wood and other materials. CNC wood bits, for instance, only cut wood. Every revolution either deepens, widens, or enlarges the cut.ĭifferent bits have different purposes. The spindle moves at high speeds, allowing the router bit’s cutting edge to remove a certain amount of material. What are CNC Router Bits?ĬNC bits are the tools that fit into a CNC router’s rotating spindle. ![]() The descriptions of the different CNC bits cover what each one does well. For instance, in our sections about materials, we tell you exactly which materials work for which workpieces. We’ll also delve into some of the other details. In this article, we’ll take a closer look at: Knowing which CNC bits to choose can be confusing, and few people truly understand how they work. ![]() CNC wood bits, engraving bits, or metalworking bits, enable your machine to do what it’s made for. ![]()
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