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Feeds and speeds for Aluminium

Aluminium works on hobby machines too, as long as the depth of cut stays small and chips do not stick to the edge. For example: Aluminium, aluminium composite.

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The most common bits

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
End mill Ø 2 mm2 flutes · upcut	12,000	170	30	0.2	0.007
End mill Ø 3.175 mm2 flutes · upcut	12,000	270	50	0.3	0.011
End mill Ø 6 mm2 flutes · upcut	12,000	420	80	0.6	0.018
End mill Ø 6.35 mm2 flutes · upcut	12,000	420	80	0.65	0.018
Single-flute end mill Ø 3.175 mm1 flute	12,000	130	30	0.3	0.011
Multi-flute end mill Ø 3.175 mm3 flutes · ZrN coated	12,000	400	80	0.3	0.011
Multi-flute end mill Ø 6 mm3 flutes · ZrN coated	12,000	630	130	0.6	0.018
V-bit 60° Ø 3.175 mm2 flutes	12,000	150	30	0.2	0.006
V-bit 90° Ø 3.175 mm2 flutes	12,000	150	30	0.2	0.006
Engraving bit 20°, tip 0.1 mm	12,000	60	30	0.05	0.005
Engraving bit 30°, tip 0.2 mm	12,000	60	30	0.05	0.005
Twist drill Ø 3 mm	10,000	110	110	6	–

Starting values without guarantee. Machine, spindle, clamping and bit condition all affect the right values.

All 73 bits for Aluminium

End mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
End mill Ø 2 mm2 flutes · upcut	12,000	170	30	0.2	0.007
End mill Ø 2.5 mm2 flutes · upcut	12,000	210	40	0.25	0.009
End mill Ø 3 mm2 flutes · upcut	12,000	250	50	0.3	0.01
End mill Ø 3.175 mm2 flutes · upcut	12,000	270	50	0.3	0.011
End mill Ø 3.175 mm2 flutes · upcut	12,000	270	50	0.3	0.011
End mill Ø 3.175 mm2 flutes · upcut	12,000	270	50	0.3	0.011
End mill Ø 4 mm2 flutes · upcut	12,000	340	70	0.4	0.014
End mill Ø 5 mm2 flutes · upcut	12,000	420	80	0.5	0.018
End mill Ø 6 mm2 flutes · upcut	12,000	420	80	0.6	0.018
End mill Ø 6 mm2 flutes · upcut	12,000	420	80	0.6	0.018
End mill Ø 6.35 mm2 flutes · upcut	12,000	420	80	0.65	0.018
End mill Ø 8 mm2 flutes · upcut	12,000	420	80	0.8	0.018

Single-flute end mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Single-flute end mill Ø 1.5 mm1 flute	12,000	60	30	0.15	0.005
Single-flute end mill Ø 2 mm1 flute	12,000	80	30	0.2	0.007
Single-flute end mill Ø 2.5 mm1 flute	12,000	100	30	0.25	0.008
Single-flute end mill Ø 3 mm1 flute	12,000	130	30	0.3	0.011
Single-flute end mill Ø 3.175 mm1 flute	12,000	130	30	0.3	0.011
Single-flute end mill Ø 4 mm1 flute	12,000	170	30	0.4	0.014
Single-flute end mill Ø 5 mm1 flute	12,000	210	40	0.5	0.018
Single-flute end mill Ø 6 mm1 flute	12,000	210	40	0.6	0.018
Single-flute end mill Ø 6.35 mm1 flute	12,000	210	40	0.65	0.018

Multi-flute end mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Multi-flute end mill Ø 2 mm3 flutes · DLC coated	12,000	250	50	0.2	0.007
Multi-flute end mill Ø 3 mm3 flutes · ZrN coated	12,000	380	80	0.3	0.011
Multi-flute end mill Ø 3 mm4 flutes · TiAlN coated	12,000	500	100	0.3	0.01
Multi-flute end mill Ø 3.175 mm3 flutes · ZrN coated	12,000	400	80	0.3	0.011
Multi-flute end mill Ø 4 mm3 flutes · ZrN coated	12,000	500	100	0.4	0.014
Multi-flute end mill Ø 4 mm4 flutes · TiAlN coated	12,000	670	130	0.4	0.014
Multi-flute end mill Ø 5 mm3 flutes · ZrN coated	12,000	630	130	0.5	0.018
Multi-flute end mill Ø 6 mm3 flutes · DLC coated	12,000	630	130	0.6	0.018
Multi-flute end mill Ø 6 mm3 flutes · ZrN coated	12,000	630	130	0.6	0.018
Multi-flute end mill Ø 6 mm4 flutes · TiAlN coated	12,000	840	170	0.6	0.018
Multi-flute end mill Ø 8 mm3 flutes · ZrN coated	12,000	630	130	0.8	0.018

V-bit

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
V-bit 30° Ø 3.175 mm2 flutes	12,000	150	30	0.2	0.006
V-bit 45° Ø 3.175 mm2 flutes	12,000	150	30	0.2	0.006
V-bit 60° Ø 3.175 mm2 flutes	12,000	150	30	0.2	0.006
V-bit 90° Ø 3.175 mm2 flutes	12,000	150	30	0.2	0.006
V-bit 120° Ø 3.175 mm2 flutes	12,000	150	30	0.2	0.006
V-bit 60° Ø 6 mm2 flutes	12,000	150	30	0.2	0.006
V-bit 90° Ø 6 mm2 flutes	12,000	150	30	0.2	0.006

Engraving bit

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Engraving bit 10°, tip 0.1 mm	12,000	60	30	0.05	0.005
Engraving bit 10°, tip 0.2 mm	12,000	60	30	0.05	0.005
Engraving bit 15°, tip 0.1 mm	12,000	60	30	0.05	0.005
Engraving bit 15°, tip 0.2 mm	12,000	60	30	0.05	0.005
Engraving bit 20°, tip 0.1 mm	12,000	60	30	0.05	0.005
Engraving bit 20°, tip 0.15 mm	12,000	60	30	0.05	0.005
Engraving bit 20°, tip 0.2 mm	12,000	60	30	0.05	0.005
Engraving bit 25°, tip 0.1 mm	12,000	60	30	0.05	0.005
Engraving bit 30°, tip 0.1 mm	12,000	60	30	0.05	0.005
Engraving bit 30°, tip 0.2 mm	12,000	60	30	0.05	0.005
Engraving bit 30°, tip 0.3 mm	12,000	60	30	0.05	0.005
Engraving bit 45°, tip 0.1 mm	12,000	60	30	0.05	0.005
Engraving bit 45°, tip 0.2 mm	12,000	60	30	0.05	0.005
Engraving bit 60°, tip 0.1 mm	12,000	60	30	0.05	0.005
Engraving bit 60°, tip 0.2 mm	12,000	60	30	0.05	0.005
Engraving bit 90°, tip 0.2 mm	12,000	60	30	0.05	0.005
Engraving bit 90°, tip 0.5 mm	12,000	60	30	0.05	0.005

Twist drill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Twist drill Ø 0.5 mm	10,000	40	40	1	–
Twist drill Ø 0.8 mm	10,000	40	40	1.5	–
Twist drill Ø 1 mm	10,000	40	40	2	–
Twist drill Ø 1.2 mm	10,000	40	40	2.5	–
Twist drill Ø 1.5 mm	10,000	50	50	3	–
Twist drill Ø 2 mm	10,000	70	70	4	–
Twist drill Ø 2.5 mm	10,000	90	90	5	–
Twist drill Ø 3 mm	10,000	110	110	6	–
Twist drill Ø 3.5 mm	10,000	120	120	7	–
Twist drill Ø 4 mm	10,000	140	140	8	–
Twist drill Ø 4.5 mm	10,000	160	160	9	–
Twist drill Ø 5 mm	10,000	180	180	10	–
Twist drill Ø 5.5 mm	10,000	190	190	11	–
Twist drill Ø 6 mm	10,000	210	210	12	–
Twist drill Ø 6.5 mm	10,000	230	230	13	–
Twist drill Ø 7 mm	10,000	240	240	14	–
Twist drill Ø 8 mm	10,000	280	280	16	–

What matters with Aluminium

Light depth of cut (0.1 to 0.3 mm per pass) and more passes instead, which keeps the machine calm.
Lubricate: alcohol, spray oil or mist lubrication stop aluminium from sticking to the cutting edge.
Use single-flute or coated multi-flute bits (ZrN); uncoated bits clog up.
Do not plunge straight down, ramp in instead, and always wear safety glasses.

Other materials

CNC feeds and speeds → · Router bit types explained →

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