What to Look for in a CNC Router Bit Starter Set

By Premium CNC & Router Bits for Precision Cutting | Published: 2026-10-19

Category: Buying Guides

Choosing your first CNC bit set? Learn the key factors—shank size, coating, bit types, and set size—so you can pick a kit that matches your projects and machine.

Quick Answer

For most beginners, a 1/4″ shank set with a mix of down-cut, up-cut, and a v-groove bit is the most versatile starting point. Choose a kit that matches the materials you'll cut and your machine's collet size.

Shank Size Matters More Than You Think

Before you pick a set, check your router or spindle's collet. Most hobby CNCs accept 1/4″ shanks, but some take 1/8″ or even 1/2″. A set with mixed shank sizes can be useful if you have an ATC (automatic tool changer) or multiple collets, but for a simple machine, sticking to one size avoids extra collet changes.

Coating: Not Just a Marketing Term

A coating like AstraHP can reduce friction and heat, which helps bits last longer, especially in abrasive materials like plywood or MDF. If you plan to cut a lot of wood or composites, a coated set is worth the extra cost. For occasional softwood projects, uncoated bits may be fine, but coated bits are a safer bet for beginners who are still learning feed rates.

Bit Variety: What Do You Actually Need?

A starter set should cover the basics: a down-cut bit for clean top edges, an up-cut bit for chip evacuation, and a v-groove bit for engraving. Ball nose bits are great for 3D carving, but if you're just starting with signs and cutouts, you might not need them right away. Look for a set that matches your first few projects, not every possible future task.

Decision Rules for Choosing a Starter Set

Check your collet size: Confirm whether your router or spindle takes 1/4″ shanks (common for hobby machines) or another size. If you have an ATC, mixed shank sets like the 7-piece Maker ATC set can be a good fit. If you're unsure, check your machine's manual before buying.
Match the set to your first projects: For signs and lettering, a set with a down-cut and a v-groove bit is essential. For 3D carving, look for ball nose bits. For clean edges on both sides, consider a compression bit.
Decide on coating based on material: Choose AstraHP coated bits if you'll cut abrasive materials like plywood, MDF, or composites. For occasional softwood, uncoated may work, but coated bits offer more forgiveness for beginners. Coating can extend bit life, but it doesn't replace proper feed rates.
Consider set size vs. budget: A 3-piece set is the most affordable way to start. A 5-piece set adds versatility for signs and cutouts. A 9-piece set covers engraving, carving, and even soft metal milling. If you're unsure, start with a smaller set and expand as your skills grow.

Starter Sets We Recommend

3 Piece Basic CNC Router Bit Set – AstraHP Coated: This 3-piece set includes a 1/4″ down-cut bit, a 1/2″ bowl and tray bit, and a 1/2″ 60° v-groove bit, all with AstraHP coating. It's a compact, budget-friendly way to start with clean edges, simple engraving, and even small bowl projects without buying extra bits.
3 Piece Basic CNC Router Bit Set – AstraHP Coated
5 Piece CNC Starter Bit Set – AstraHP Coated: This 5-piece set adds a long-reach down-cut bit and a compression bit to the core down-cut and v-groove bits, all AstraHP coated. The extra bits give you better detail work and cleaner edges on both sides of thicker material, making it a step up for sign making and cutouts.
5 Piece CNC Starter Bit Set – AstraHP Coated

Who Should Buy Which Starter Set?

Best For

Beginners with a 1/4″ collet who want a low-cost way to try signs, engraving, and simple cutouts – the 3-piece set is ideal.
New users who plan to do more detailed sign work and cutouts in thicker materials – the 5-piece set adds a compression bit for cleaner edges.

Not For

Users with a spindle that only accepts 1/8″ or 1/2″ shanks – these sets are 1/4″ shank.
Advanced users needing specialized bits for specific materials like aluminum – a larger set or individual bits may be better.