Best CNC Router Bits for Most Hobby CNC Buyers
If you only buy three bits to get started, make them a 1/4-inch upcut spiral for everyday cutting, a V-bit for signs and chamfers, and a compression bit once sheet goods become a serious part of your workflow.
Best for most people
1/4-inch upcut spiral
The one bit that earns its keep immediately for wood, MDF, and general routing while teaching you the basics of chip evacuation and feed rate.
Best budget add-on
45-degree V-bit
The fastest way to unlock lettering, sign work, chamfers, and decorative details without overthinking tool geometry.
Best upgrade
Compression bit
Worth it for plywood and laminated material when the cut engages the upcut section at the bottom and the downcut section at the top. The top surface must sit above the upcut length; shallow passes can still tear it out.
What to buy first
Most buyers do not need a giant bit set. They need one reliable straight-ahead cutter, one decorative cutter, and one upgrade for cleaner sheet-goods work. Start there, then branch into ball-nose, surfacing, or aluminum-specific tools once your projects demand them.
Buy this if
Choose the upcut first if you mostly cut wood and plywood. Add the V-bit if signs and lettering are part of the plan. Move to a compression bit once you are making enough cabinet parts, templates, or laminated panels to care about edge quality. For a fuller geometry breakdown, read upcut vs downcut vs compression.
Skip this mistake
Do not treat bits like an afterthought. A weak machine with a good bit often cuts better than a stronger machine with a dull or wrong bit. If your router still needs workholding and dust collection, fix those too: hidden costs and feeds and speeds are the next two pages worth opening.
Where to go next
- Browse the full bits directory if you already know the geometry you need.
- Upcut vs Downcut vs Compression if you are choosing between edge quality and chip evacuation.
- Cutting Aluminum on a Hobby CNC Router before buying metal-cutting tooling you may not be ready to use well.
Parts for this guide
If you are buying after reading this, these are the specs to look for.
| Part | What to buy | Where to look |
|---|---|---|
| General-purpose upcut spiral The reader needs a first cutter for wood and MDF with straightforward chip evacuation. | Solid carbide, two-flute, 1/4-inch cutting diameter and 1/4-inch shank, center-cutting upcut; choose the shortest cutting length that clears the stock and use a true 1/4-inch collet. | |
| V-carving bit The reader needs a correctly defined cutter for lettering and decorative V-carving. | Carbide V-bit with a documented 45-degree included angle, 1/4-inch shank and specified tip flat; enter that geometry in CAM and select a 90-degree included bit instead for a 45-degree chamfer. | |
| Short-upcut compression bit The reader cutting laminated sheet needs both faces supported by the correct cutting direction. | Solid carbide, two-flute compression bit, 1/8-inch cutting diameter and shank for a suitable small machine; documented upcut length shorter than the planned initial engagement depth and flute length sufficient for the stock. |
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