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Feeds and speeds for Rigid foam

Rigid foam can be cut with deep passes and high feed rates, ideal for models, moulds and reliefs. For example: Tooling board, PU foam, XPS.

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The most common bits

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
End mill Ø 1 mm2 flutes · upcut	20,000	640	260	1	0.016
End mill Ø 2 mm2 flutes · upcut	16,000	1,020	410	2	0.032
End mill Ø 3.175 mm2 flutes · upcut	16,000	1,630	650	3.15	0.051
End mill Ø 6 mm2 flutes · upcut	16,000	2,500	800	4	0.078
End mill Ø 6.35 mm2 flutes · upcut	16,000	2,500	800	4	0.078
Single-flute end mill Ø 3.175 mm1 flute	16,000	810	320	3.15	0.051
Ball nose Ø 1 mm2 flutes	20,000	510	200	1	0.013
Ball nose Ø 3.175 mm2 flutes	16,000	1,300	520	3.15	0.041
Ball nose Ø 6.35 mm2 flutes	16,000	2,050	800	4	0.064
Tapered ball nose R 0.25 mm3.6° · 2 flutes	20,000	450	180	1.5	0.011
Surfacing bit Ø 25.4 mm3 flutes	14,000	2,500	800	0.5	0.06

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

All 51 bits for Rigid foam

End mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
End mill Ø 0.8 mm2 flutes · upcut	20,000	510	200	0.8	0.013
End mill Ø 1 mm2 flutes · upcut	20,000	640	260	1	0.016
End mill Ø 1.2 mm2 flutes · upcut	20,000	770	310	1.2	0.019
End mill Ø 1.5 mm2 flutes · upcut	16,000	770	310	1.5	0.024
End mill Ø 2 mm2 flutes · upcut	16,000	1,020	410	2	0.032
End mill Ø 2.5 mm2 flutes · upcut	16,000	1,280	510	2.5	0.04
End mill Ø 3 mm2 flutes · upcut	16,000	1,540	620	3	0.048
End mill Ø 3.175 mm2 flutes · upcut	16,000	1,630	650	3.15	0.051
End mill Ø 3.175 mm2 flutes · upcut	16,000	1,630	650	3.15	0.051
End mill Ø 3.175 mm2 flutes · upcut	16,000	1,630	650	3.15	0.051
End mill Ø 4 mm2 flutes · upcut	16,000	2,050	800	4	0.064
End mill Ø 5 mm2 flutes · upcut	16,000	2,500	800	4	0.078
End mill Ø 6 mm2 flutes · upcut	16,000	2,500	800	4	0.078
End mill Ø 6 mm2 flutes · upcut	16,000	2,500	800	4	0.078
End mill Ø 6.35 mm2 flutes · upcut	16,000	2,500	800	4	0.078
End mill Ø 8 mm2 flutes · upcut	16,000	2,500	800	4	0.078

Single-flute end mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Single-flute end mill Ø 1.5 mm1 flute	16,000	380	150	1.5	0.024
Single-flute end mill Ø 2 mm1 flute	16,000	510	200	2	0.032
Single-flute end mill Ø 2.5 mm1 flute	16,000	640	260	2.5	0.04
Single-flute end mill Ø 3 mm1 flute	16,000	770	310	3	0.048
Single-flute end mill Ø 3.175 mm1 flute	16,000	810	320	3.15	0.051
Single-flute end mill Ø 4 mm1 flute	16,000	1,020	410	4	0.064
Single-flute end mill Ø 5 mm1 flute	16,000	1,280	510	4	0.08
Single-flute end mill Ø 6 mm1 flute	16,000	1,280	510	4	0.08
Single-flute end mill Ø 6.35 mm1 flute	16,000	1,280	510	4	0.08

Ball nose

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Ball nose Ø 0.5 mm2 flutes	20,000	260	100	0.5	0.006
Ball nose Ø 1 mm2 flutes	20,000	510	200	1	0.013
Ball nose Ø 1.5 mm2 flutes	16,000	610	240	1.5	0.019
Ball nose Ø 2 mm2 flutes	16,000	820	330	2	0.026
Ball nose Ø 2.5 mm2 flutes	16,000	1,020	410	2.5	0.032
Ball nose Ø 3 mm2 flutes	16,000	1,230	490	3	0.038
Ball nose Ø 3.175 mm2 flutes	16,000	1,300	520	3.15	0.041
Ball nose Ø 4 mm2 flutes	16,000	1,640	660	4	0.051
Ball nose Ø 5 mm2 flutes	16,000	2,050	800	4	0.064
Ball nose Ø 6 mm2 flutes	16,000	2,050	800	4	0.064
Ball nose Ø 6.35 mm2 flutes	16,000	2,050	800	4	0.064
Ball nose Ø 8 mm2 flutes	16,000	2,050	800	4	0.064

Tapered ball nose

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Tapered ball nose R 0.25 mm3.6° · 2 flutes	20,000	450	180	1.5	0.011
Tapered ball nose R 0.5 mm3.6° · 2 flutes	16,000	720	290	1.5	0.022
Tapered ball nose R 0.75 mm3.2° · 2 flutes	16,000	1,080	430	1.5	0.034
Tapered ball nose R 0.25 mm5.4° · 2 flutes	16,000	360	140	1.5	0.011
Tapered ball nose R 0.5 mm4.8° · 2 flutes	16,000	720	290	1.5	0.022
Tapered ball nose R 1 mm3.6° · 2 flutes	16,000	1,430	570	1.5	0.045

Surfacing bit

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Surfacing bit Ø 12.7 mm2 flutes	14,000	2,240	800	0.5	0.08
Surfacing bit Ø 15 mm2 flutes	14,000	2,240	800	0.5	0.08
Surfacing bit Ø 19.05 mm2 flutes	14,000	2,240	800	0.5	0.08
Surfacing bit Ø 22 mm2 flutes	14,000	2,240	800	0.5	0.08
Surfacing bit Ø 25.4 mm3 flutes	14,000	2,500	800	0.5	0.06
Surfacing bit Ø 25.4 mm3 flutes	14,000	2,500	800	0.5	0.06
Surfacing bit Ø 31.75 mm3 flutes	14,000	2,500	800	0.5	0.06
Surfacing bit Ø 38 mm3 flutes	14,000	2,500	800	0.5	0.06

What matters with Rigid foam

Hold it with double-sided tape, clamps dent the foam.
XPS and EPS melt at high spindle speeds: lower the speed and raise the feed rate.
Use ball nose bits for reliefs, they leave hardly any steps.
The dust is light and static: extraction right at the bit helps most.

Other materials

CNC feeds and speeds → · Router bit types explained →

The app applies the values

In CNC.myWerkzeug.de you choose the material and the bit, and the matching feeds and speeds are already in the toolpaths. You can save your own values per bit.

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