CNC Router Bits
Right flute count for chip clearance and finish.
Solutions / Aluminum
CNC Tools for Aluminum
Cut Aluminum with Confidence
Rigidity, spindle speed, feed rate and chip evacuation — the four things that decide whether aluminum cuts cleanly or snaps your tool.
AluminumBrassCopper
Recommended Products
What You Need to Cut Aluminum
Spindles
Stable RPM and enough torque to hold speed in the cut.
Collets
Reduce runout — critical on small end mills.
Workholding
Aluminum needs a rigid, vibration-free setup.
The Four Variables
What Actually Decides the Result
Get these four right and aluminum machines cleanly on a desktop CNC. Get one wrong and you break tools.
Rigidity
Any flex in the machine or the setup shows up as chatter, poor finish and broken end mills. Stiffen the machine before chasing speeds.
Spindle Speed
Aluminum needs controlled RPM. Too fast burns the cutting edge, too slow lets the tool rub and work-harden the surface.
Feed Rate
Chip load per tooth is what keeps the cutter cool. Keep the tool moving — dwelling in the cut is what kills it.
Chip Evacuation
Recut chips are the number one cause of bad finishes and snapped tools. Use air blast and climb milling to clear the pocket.
Upgrades
Desktop CNC Upgrades for Aluminum
Small desktop routers can cut aluminum — with the right spindle, rigidity and control upgrades.
3018 Upgrades
Spindle and rigidity upgrades for the 3018.
Shop 3018 Upgrades3020 Upgrades
More spindle power and better motion control.
Shop 3020 Upgrades3040 Upgrades
The sweet spot for aluminum on a desktop frame.
Shop 3040 Upgrades4040 Upgrades
Bigger work area, more rigidity.
Shop 4040 UpgradesLearn
Aluminum Machining Guides
Practical answers to the questions we get asked most.
- Best CNC Bits for Aluminum
- Can a 3018 CNC Cut Aluminum?
- How to Cut Aluminum on a Desktop CNC
- Single Flute vs Two Flute for Aluminum
- How to Prevent Aluminum from Sticking to CNC Bits
FAQ
Cutting Aluminum Questions
Can a desktop CNC cut aluminum?
Yes, if the machine is rigid and you take light, consistent passes. A 3040-class machine with a 800W-1.5KW spindle and a rigid vise will cut aluminum reliably. Flex, not spindle power, is usually the limiting factor.
Should I use a single flute or two flute end mill for aluminum?
Single flute gives maximum chip clearance and is the safer choice on small, high-RPM spindles. Two flute tools are stronger and give a better finish when your machine has enough rigidity and torque.
Why does aluminum stick to my end mill?
Built-up edge comes from rubbing rather than cutting: too low a feed rate, too high an RPM, or no lubrication. Increase chipload, add a lubricant or air blast, and use a cutter designed for non-ferrous metals.
What spindle do I need to machine aluminum?
800W is the practical minimum, 1.5KW is comfortable, and 2.2KW lets you run larger cutters and deeper passes. Equally important is a spindle that holds RPM under load.
Next
Cut Aluminum with Confidence
Right bit, right collet, rigid setup — then let the machine do the work.