Choosing the Right CNC Bits for Woodworking: A Comprehensive Guide

Choosing the Right CNC Bits for Woodworking: A Comprehensive Guide

The world of woodworking has been revolutionized by mechanical technology, and CNC machining has made a major impact on how wood products are produced. CNC machines are used to create intricate designs with greater precision and speed, and the type of tooling used can drastically impact the quality of the final product. Amongst the most critical tools used in CNC woodworking are CNC bits. These bits are available in many varieties and materials, with each offering specific advantages and disadvantages. In this guide, we’ll explore what CNC bits are, the various types available, and things to consider before making a purchase. Browse this site to find out an article source on sundicuttingtools.

What are CNC Bits?

What are CNC Bits?

CNC bits are cutting tools designed for a computer numerical control (CNC) machine to carve, etch, and cut designs into wood, and other materials like plastic, foam or even metal. CNC bits come in many shapes and sizes and are made of different materials that suit certain purposes. They are typically made of carbide or diamond materials because they are the most resilient and durable.

Types of CNC Bits

CNC bits for wood are available in various forms, and each tool is designed to serve specific purposes. Here are some of the most popular types of CNC bits.

Straight CNC Bits

Straight CNC bits have a flat cutting edge, pointed tips, and a smooth shank. They are ideal for general purpose cutting, drilling, and slotting, and are suitable for cuts in softwoods, hardwoods, and plywoods.

Spiral CNC Bits

Spiral CNC bits also have flat cutting edges, but they are twisted in a spiral formation, giving them a longer cutting edge. They are optimal for cutting, carving, and engraving, and are best used on softwoods, hardwoods, and plywoods.

Compression CNC Bits

Compression CNC bits are designed with two different flutes, the first with an up-cut and the second with a down-cut. They work well with two-sided veneers or laminates, and are great for double-sided cutting operations.

V-groove CNC Bits

V-groove CNC bits are ideal for making V-groove cuts on wooden surfaces. They are perfect for making sharp corners, and or precise cuts in woods and plastics.

Ball-nose CNC Bits

Ball-nose CNC bits are spherical-shaped and are designed to make rounded cuts. They are great for finishing curved spaces like spoons and bowls.

There are many types of CNC bits available, and new kinds are developed regularly. Understanding the unique traits and details of each type can help you select the best bit for your requirements.

What factors influence the choice of CNC Bits for Wood?

Aside from knowing the types of CNC bits available, it is also crucial to consider other factors when choosing the right bit for your woodworking project. These are as follows:


The type of wood you’re cutting determines the ideal bit type; for instance, you can’t use a universal bit to cut a dense hardwood; you’ll need a specialized bit. Also, the material of the bit is essential. Carbide and diamond-tipped bits are popular since they are both more durable and effective than other materials.

Cutting Speed and Feed rate.

The feed rate is the feed speed of the wood material moving through the machine. A higher feed rate means you’ll need a bit with deeper teeth and a larger chip load to process the material quickly. A slower feed rate calls for a shallower or flatter bit that won’t grab and break.

Shank Size

The shank is the part of the bit that fits into the router. Since CNC machines have different collet sizes, choosing the right shank size is critical to ensure compatibility between the bit and the machine. Most machines will use a 1/4-, 1/8-, or 1/2-inch shank.


CNC bits come in various shapes and sizes and are used in CNC woodworking to sculpt, cut, and craft intricate designs with speed and precision. Selecting the right CNC bits depends on the material you’re cutting, the type of cut you need, the machine you’re using, and bit type.