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Feeds and speeds for Plastics

HDPE, POM and other engineering plastics are tough: they want to be cut, not scraped. For example: HDPE, POM (Delrin), PVC, ABS.

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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	440	130	0.5	0.011
End mill Ø 2 mm2 flutes · upcut	16,000	700	210	1	0.022
End mill Ø 3.175 mm2 flutes · upcut	16,000	1,120	340	1.6	0.035
End mill Ø 6 mm2 flutes · upcut	16,000	1,760	530	3	0.055
End mill Ø 6.35 mm2 flutes · upcut	16,000	1,760	530	3.15	0.055
Single-flute end mill Ø 3.175 mm1 flute	16,000	560	170	1.6	0.035
Multi-flute end mill Ø 3.175 mm3 flutes · ZrN coated	16,000	1,680	500	1.6	0.035
Multi-flute end mill Ø 6 mm3 flutes · ZrN coated	16,000	2,500	750	3	0.052
Ball nose Ø 1 mm2 flutes	20,000	350	110	0.5	0.009
Ball nose Ø 3.175 mm2 flutes	16,000	890	270	1.6	0.028
Ball nose Ø 6.35 mm2 flutes	16,000	1,410	420	3.15	0.044
Tapered ball nose R 0.25 mm3.6° · 2 flutes	20,000	310	90	1	0.008
V-bit 60° Ø 3.175 mm2 flutes	16,000	630	190	1	0.02
V-bit 90° Ø 3.175 mm2 flutes	16,000	630	190	1	0.02
V-bit 60° Ø 12.7 mm2 flutes	14,000	550	170	1	0.02
V-bit 90° Ø 12.7 mm2 flutes	14,000	550	170	1	0.02
Engraving bit 20°, tip 0.1 mm	16,000	180	50	0.3	0.011
Engraving bit 30°, tip 0.2 mm	16,000	180	50	0.3	0.011
PCB isolation end mill Ø 0.2 mm	20,000	220	70	0.1	0.005
PCB isolation end mill Ø 0.4 mm	20,000	220	70	0.2	0.005
Twist drill Ø 3 mm	10,000	330	330	6	–
PCB drill Ø 0.8 mm	20,000	180	180	1.5	–
PCB drill Ø 1 mm	20,000	220	220	2	–
Corn cob bit Ø 1 mm	20,000	220	70	0.5	–
Corn cob bit Ø 2 mm	16,000	350	110	1	–
Surfacing bit Ø 25.4 mm3 flutes	14,000	2,310	690	0.5	0.055

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

All 149 bits for Plastics

End mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
End mill Ø 0.8 mm2 flutes · upcut	20,000	350	110	0.4	0.009
End mill Ø 1 mm2 flutes · upcut	20,000	440	130	0.5	0.011
End mill Ø 1.2 mm2 flutes · upcut	20,000	530	160	0.6	0.013
End mill Ø 1.5 mm2 flutes · upcut	16,000	530	160	0.75	0.017
End mill Ø 2 mm2 flutes · upcut	16,000	700	210	1	0.022
End mill Ø 2.5 mm2 flutes · upcut	16,000	880	260	1.25	0.028
End mill Ø 3 mm2 flutes · upcut	16,000	1,060	320	1.5	0.033
End mill Ø 3.175 mm2 flutes · upcut	16,000	1,120	340	1.6	0.035
End mill Ø 3.175 mm2 flutes · upcut	16,000	1,120	340	1.6	0.035
End mill Ø 3.175 mm2 flutes · upcut	16,000	1,120	340	1.6	0.035
End mill Ø 3.175 mm3 flutes · upcut	16,000	1,680	500	1.6	0.035
End mill Ø 4 mm2 flutes · upcut	16,000	1,410	420	2	0.044
End mill Ø 5 mm2 flutes · upcut	16,000	1,760	530	2.5	0.055
End mill Ø 6 mm2 flutes · upcut	16,000	1,760	530	3	0.055
End mill Ø 6 mm2 flutes · upcut	16,000	1,760	530	3	0.055
End mill Ø 6 mm3 flutes · upcut	16,000	2,500	750	3	0.052
End mill Ø 6.35 mm2 flutes · upcut	16,000	1,760	530	3.15	0.055
End mill Ø 8 mm2 flutes · upcut	16,000	1,760	530	4	0.055

Single-flute end mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Single-flute end mill Ø 1.5 mm1 flute	16,000	260	80	0.75	0.016
Single-flute end mill Ø 2 mm1 flute	16,000	350	110	1	0.022
Single-flute end mill Ø 2.5 mm1 flute	16,000	440	130	1.25	0.028
Single-flute end mill Ø 3 mm1 flute	16,000	530	160	1.5	0.033
Single-flute end mill Ø 3.175 mm1 flute	16,000	560	170	1.6	0.035
Single-flute end mill Ø 4 mm1 flute	16,000	700	210	2	0.044
Single-flute end mill Ø 5 mm1 flute	16,000	880	260	2.5	0.055
Single-flute end mill Ø 6 mm1 flute	16,000	880	260	3	0.055
Single-flute end mill Ø 6.35 mm1 flute	16,000	880	260	3.15	0.055

Multi-flute end mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Multi-flute end mill Ø 2 mm3 flutes · DLC coated	16,000	1,060	320	1	0.022
Multi-flute end mill Ø 3 mm3 flutes · ZrN coated	16,000	1,580	470	1.5	0.033
Multi-flute end mill Ø 3.175 mm3 flutes · ZrN coated	16,000	1,680	500	1.6	0.035
Multi-flute end mill Ø 4 mm3 flutes · ZrN coated	16,000	2,110	630	2	0.044
Multi-flute end mill Ø 5 mm3 flutes · ZrN coated	16,000	2,500	750	2.5	0.052
Multi-flute end mill Ø 6 mm3 flutes · DLC coated	16,000	2,500	750	3	0.052
Multi-flute end mill Ø 6 mm3 flutes · ZrN coated	16,000	2,500	750	3	0.052
Multi-flute end mill Ø 8 mm3 flutes · ZrN coated	16,000	2,500	750	4	0.052

Ball nose

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Ball nose Ø 0.5 mm2 flutes	20,000	180	50	0.25	0.004
Ball nose Ø 1 mm2 flutes	20,000	350	110	0.5	0.009
Ball nose Ø 1.5 mm2 flutes	16,000	420	130	0.75	0.013
Ball nose Ø 2 mm2 flutes	16,000	560	170	1	0.018
Ball nose Ø 2.5 mm2 flutes	16,000	700	210	1.25	0.022
Ball nose Ø 3 mm2 flutes	16,000	840	250	1.5	0.026
Ball nose Ø 3.175 mm2 flutes	16,000	890	270	1.6	0.028
Ball nose Ø 4 mm2 flutes	16,000	1,130	340	2	0.035
Ball nose Ø 5 mm2 flutes	16,000	1,410	420	2.5	0.044
Ball nose Ø 6 mm2 flutes	16,000	1,410	420	3	0.044
Ball nose Ø 6.35 mm2 flutes	16,000	1,410	420	3.15	0.044
Ball nose Ø 8 mm2 flutes	16,000	1,410	420	4	0.044

Tapered ball nose

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Tapered ball nose R 0.25 mm3.6° · 2 flutes	20,000	310	90	1	0.008
Tapered ball nose R 0.5 mm3.6° · 2 flutes	16,000	490	150	1.5	0.015
Tapered ball nose R 0.75 mm3.2° · 2 flutes	16,000	740	220	1.5	0.023
Tapered ball nose R 0.25 mm5.4° · 2 flutes	16,000	250	80	1	0.008
Tapered ball nose R 0.5 mm4.8° · 2 flutes	16,000	490	150	1.5	0.015
Tapered ball nose R 1 mm3.6° · 2 flutes	16,000	990	300	1.5	0.031

V-bit

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
V-bit 30° Ø 3.175 mm2 flutes	16,000	630	190	1	0.02
V-bit 45° Ø 3.175 mm2 flutes	16,000	630	190	1	0.02
V-bit 60° Ø 3.175 mm2 flutes	16,000	630	190	1	0.02
V-bit 90° Ø 3.175 mm2 flutes	16,000	630	190	1	0.02
V-bit 120° Ø 3.175 mm2 flutes	16,000	630	190	0.9	0.02
V-bit 60° Ø 6 mm2 flutes	16,000	630	190	1	0.02
V-bit 90° Ø 6 mm2 flutes	16,000	630	190	1	0.02
V-bit 60° Ø 12 mm2 flutes	14,000	550	170	1	0.02
V-bit 90° Ø 12 mm2 flutes	14,000	550	170	1	0.02
V-bit 60° Ø 12.7 mm2 flutes	14,000	550	170	1	0.02
V-bit 90° Ø 12.7 mm2 flutes	14,000	550	170	1	0.02
V-bit 120° Ø 12.7 mm2 flutes	14,000	550	170	1	0.02
V-bit 60° Ø 19.05 mm2 flutes	14,000	550	170	1	0.02
V-bit 90° Ø 19.05 mm2 flutes	14,000	550	170	1	0.02

Engraving bit

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Engraving bit 10°, tip 0.1 mm	16,000	180	50	0.3	0.011
Engraving bit 10°, tip 0.2 mm	16,000	180	50	0.3	0.011
Engraving bit 15°, tip 0.1 mm	16,000	180	50	0.3	0.011
Engraving bit 15°, tip 0.2 mm	16,000	180	50	0.3	0.011
Engraving bit 20°, tip 0.1 mm	16,000	180	50	0.3	0.011
Engraving bit 20°, tip 0.15 mm	16,000	180	50	0.3	0.011
Engraving bit 20°, tip 0.2 mm	16,000	180	50	0.3	0.011
Engraving bit 25°, tip 0.1 mm	16,000	180	50	0.3	0.011
Engraving bit 30°, tip 0.1 mm	16,000	180	50	0.3	0.011
Engraving bit 30°, tip 0.2 mm	16,000	180	50	0.3	0.011
Engraving bit 30°, tip 0.3 mm	16,000	180	50	0.3	0.011
Engraving bit 45°, tip 0.1 mm	16,000	180	50	0.3	0.011
Engraving bit 45°, tip 0.2 mm	16,000	180	50	0.3	0.011
Engraving bit 60°, tip 0.1 mm	16,000	180	50	0.3	0.011
Engraving bit 60°, tip 0.2 mm	16,000	180	50	0.3	0.011
Engraving bit 90°, tip 0.2 mm	16,000	180	50	0.3	0.011
Engraving bit 90°, tip 0.5 mm	16,000	180	50	0.3	0.011

PCB isolation end mill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
PCB isolation end mill Ø 0.1 mm	20,000	220	70	0.05	0.005
PCB isolation end mill Ø 0.15 mm	20,000	220	70	0.05	0.005
PCB isolation end mill Ø 0.2 mm	20,000	220	70	0.1	0.005
PCB isolation end mill Ø 0.25 mm	20,000	220	70	0.15	0.005
PCB isolation end mill Ø 0.3 mm	20,000	220	70	0.15	0.005
PCB isolation end mill Ø 0.4 mm	20,000	220	70	0.2	0.005
PCB isolation end mill Ø 0.5 mm	20,000	220	70	0.25	0.005
PCB isolation end mill Ø 0.6 mm	20,000	260	80	0.3	0.006
PCB isolation end mill Ø 0.8 mm	20,000	350	110	0.3	0.009
PCB isolation end mill Ø 1 mm	20,000	440	130	0.3	0.011

Twist drill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Twist drill Ø 0.5 mm	10,000	60	60	1	–
Twist drill Ø 0.8 mm	10,000	90	90	1.5	–
Twist drill Ø 1 mm	10,000	110	110	2	–
Twist drill Ø 1.2 mm	10,000	130	130	2.5	–
Twist drill Ø 1.5 mm	10,000	170	170	3	–
Twist drill Ø 2 mm	10,000	220	220	4	–
Twist drill Ø 2.5 mm	10,000	280	280	5	–
Twist drill Ø 3 mm	10,000	330	330	6	–
Twist drill Ø 3.5 mm	10,000	390	390	7	–
Twist drill Ø 4 mm	10,000	440	440	8	–
Twist drill Ø 4.5 mm	10,000	500	500	9	–
Twist drill Ø 5 mm	10,000	550	550	10	–
Twist drill Ø 5.5 mm	10,000	600	600	11	–
Twist drill Ø 6 mm	10,000	600	600	12	–
Twist drill Ø 6.5 mm	10,000	600	600	13	–
Twist drill Ø 7 mm	10,000	600	600	14	–
Twist drill Ø 8 mm	10,000	600	600	16	–

PCB drill

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
PCB drill Ø 0.3 mm	20,000	70	70	0.5	–
PCB drill Ø 0.4 mm	20,000	90	90	1	–
PCB drill Ø 0.5 mm	20,000	110	110	1	–
PCB drill Ø 0.6 mm	20,000	130	130	1	–
PCB drill Ø 0.7 mm	20,000	150	150	1.5	–
PCB drill Ø 0.8 mm	20,000	180	180	1.5	–
PCB drill Ø 0.9 mm	20,000	200	200	2	–
PCB drill Ø 1 mm	20,000	220	220	2	–
PCB drill Ø 1.1 mm	20,000	240	240	2	–
PCB drill Ø 1.2 mm	20,000	260	260	2.5	–
PCB drill Ø 1.3 mm	20,000	290	290	2.5	–
PCB drill Ø 1.4 mm	20,000	310	310	3	–
PCB drill Ø 1.5 mm	16,000	260	260	3	–
PCB drill Ø 1.6 mm	16,000	280	280	3	–
PCB drill Ø 1.8 mm	16,000	320	320	3.5	–
PCB drill Ø 2 mm	16,000	350	350	4	–
PCB drill Ø 2.5 mm	16,000	440	440	5	–
PCB drill Ø 3 mm	16,000	530	530	6	–

Corn cob bit

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Corn cob bit Ø 0.6 mm	20,000	130	40	0.3	–
Corn cob bit Ø 0.8 mm	20,000	180	50	0.4	–
Corn cob bit Ø 1 mm	20,000	220	70	0.5	–
Corn cob bit Ø 1.2 mm	20,000	260	80	0.6	–
Corn cob bit Ø 1.5 mm	16,000	260	80	0.75	–
Corn cob bit Ø 1.8 mm	16,000	320	100	0.9	–
Corn cob bit Ø 2 mm	16,000	350	110	1	–
Corn cob bit Ø 2.5 mm	16,000	440	130	1.25	–
Corn cob bit Ø 3 mm	16,000	530	160	1.5	–
Corn cob bit Ø 3.175 mm	16,000	560	170	1.6	–
Corn cob bit Ø 4 mm	16,000	700	210	2	–
Corn cob bit Ø 6 mm	16,000	880	260	3	–

Surfacing bit

Bit	SpeedRPM	Feedmm/min	Plungemm/min	Depthmm	Chip loadmm
Surfacing bit Ø 12.7 mm2 flutes	14,000	1,540	460	0.5	0.055
Surfacing bit Ø 15 mm2 flutes	14,000	1,540	460	0.5	0.055
Surfacing bit Ø 19.05 mm2 flutes	14,000	1,540	460	0.5	0.055
Surfacing bit Ø 22 mm2 flutes	14,000	1,540	460	0.5	0.055
Surfacing bit Ø 25.4 mm3 flutes	14,000	2,310	690	0.5	0.055
Surfacing bit Ø 25.4 mm3 flutes	14,000	2,310	690	0.5	0.055
Surfacing bit Ø 31.75 mm3 flutes	14,000	2,310	690	0.5	0.055
Surfacing bit Ø 38 mm3 flutes	14,000	2,310	690	0.5	0.055

What matters with Plastics

Use single- or two-flute bits with large gullets, otherwise chips wrap around the bit.
Extract or blow away long strings before they block the path.
Only cut PVC with good extraction: heating it releases harmful fumes.
Plastics expand with heat: measure fits only after the part has cooled down.

Other materials

CNC feeds and speeds → · Router bit types explained →

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