Are you looking to perform ultra-efficient pocketing, or are you trying to leave a super-precise finish? You also need to think about bit diameter. Think about if the body will have enough length to make the cuts you need, dependent on how thick your material is. The first thing to consider is the length of the bit. Of course, this is very useful to have when using a CNC router. They also leave a smoother finish than a pure router bit. An end mill is essentially a type of bit that can cut in any direction – not just straight down. Some bits are technically end mills, not drill bits.They’re used to surface edges, such as your spoilboard. They have a flat contact surface, often with horizontal tips that cut almost parallel to the surface. Surfacing bits have a very different shape to most other router bits.Normally, they’re used with thinner materials where there are fewer wood chips to remove. They’re used when it’s important to have a quality finish on the bottom surface of the wood. Down-cut bits will do the opposite – pushing wood chips back down, because they spiral downwards.They’re suitable for drilling straight down into the wood. Up-cut bits are designed to remove material – the spiral goes upwards, pulling chips out of the hole.However, fewer flutes means that a slower feed rate is required, to ensure that the chips can be safely ejected from the bit. Therefore, the more flutes, the stronger the tool, often resulting in a smoother finish. Each spiral starts at a cutting edge on the bit, so the number of flutes also refers to the number of cutting edges. A flute refers to the spiral with which the drill bit removes wood chips out of the hole being drilled.However, the smaller the chips, the more friction the bit will generate, which can cause heat buildup. Chip load refers to the size of the individual wood chips generated by your router bit.They feature an up-cut design, resulting in a cleaner finish. Mortising bits are designed to be used for precise mortising cuts on thin materials.However, there are some terms that are very important to understand. If you’ve been routing for a long time, you’ll probably understand most of the terminology used. There is a lot of jargon you’ll notice when shopping for router bits. Sometimes, round over bits or v-bits are used for decorative work, as they can be extremely precise, and leave a super-smooth finish.Īlso, the round-nosed bits we mentioned earlier are great for finishing off your project, especially the lower diameter options.įor beginners, it’s often recommended to buy a set of CNC router bits, so you can get used to all the different types, and find out what types of bit you prefer to use in different situations. Anything higher (three-flute and above) is designed to be used with metal. Two-flute bits remove more material and leave a smoother finish. Typically, you will want to use two-flute bits when working with wood. What makes a good CNC router bit for engraving wood? Drill bits don’t generally have this feature. Some router bits will have a completely different shape to any drill bit.Īlso, some router bits also come with a down cut spiral, to improve the quality of the finish on the wood. This is the main difference between the two. They feature a rounded tip, which isn’t often seen on a regular drill bit. However, looking further, you might begin to notice that there are actually lots of different types of CNC router bits, each designed for different purposes.įor example, there are ball-nose CNC router bits, which are often used for cutting wood and plastics. They normally have a similar sort of size and shape, and a similar flute design. On the surface, drill bits and CNC router bits look pretty similar. What’s the difference between a drill bit and a CNC router bit? In this section, we’ll discuss some key things to consider when picking CNC router bits when working with wood. There are so many in fact, that it was be difficult to know what to get. There are tons of CNC router bits on the market right now. How To Pick The Best CNC Router Bits For Wood
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