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Feeds and speeds for Circuit board
Circuit boards (FR4) are made of fibreglass and copper. Bits break easily and the dust is harmful. For example: FR4, fibreglass, carbon fibre.
The most common bits
| Bit | SpeedRPM | Feedmm/min | Plungemm/min | Depthmm | Chip loadmm |
|---|---|---|---|---|---|
| Engraving bit 20°, tip 0.1 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 30°, tip 0.2 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| PCB isolation end mill Ø 0.2 mm | 20,000 | 90 | 30 | 0.1 | 0.002 |
| PCB isolation end mill Ø 0.4 mm | 20,000 | 90 | 30 | 0.2 | 0.002 |
| PCB drill Ø 0.8 mm | 20,000 | 70 | 70 | 1.5 | – |
| PCB drill Ø 1 mm | 20,000 | 90 | 90 | 2 | – |
| Corn cob bit Ø 1 mm | 20,000 | 90 | 30 | 0.25 | – |
| Corn cob bit Ø 2 mm | 20,000 | 180 | 50 | 0.5 | – |
Starting values without guarantee. Machine, spindle, clamping and bit condition all affect the right values.
All 57 bits for Circuit board
Engraving bit
| Bit | SpeedRPM | Feedmm/min | Plungemm/min | Depthmm | Chip loadmm |
|---|---|---|---|---|---|
| Engraving bit 10°, tip 0.1 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 10°, tip 0.2 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 15°, tip 0.1 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 15°, tip 0.2 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 20°, tip 0.1 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 20°, tip 0.15 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 20°, tip 0.2 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 25°, tip 0.1 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 30°, tip 0.1 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 30°, tip 0.2 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 30°, tip 0.3 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 45°, tip 0.1 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 45°, tip 0.2 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 60°, tip 0.1 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 60°, tip 0.2 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 90°, tip 0.2 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
| Engraving bit 90°, tip 0.5 mm | 20,000 | 90 | 30 | 0.15 | 0.004 |
PCB isolation end mill
| Bit | SpeedRPM | Feedmm/min | Plungemm/min | Depthmm | Chip loadmm |
|---|---|---|---|---|---|
| PCB isolation end mill Ø 0.1 mm | 20,000 | 90 | 30 | 0.05 | 0.002 |
| PCB isolation end mill Ø 0.15 mm | 20,000 | 90 | 30 | 0.05 | 0.002 |
| PCB isolation end mill Ø 0.2 mm | 20,000 | 90 | 30 | 0.1 | 0.002 |
| PCB isolation end mill Ø 0.25 mm | 20,000 | 90 | 30 | 0.15 | 0.002 |
| PCB isolation end mill Ø 0.3 mm | 20,000 | 90 | 30 | 0.15 | 0.002 |
| PCB isolation end mill Ø 0.4 mm | 20,000 | 90 | 30 | 0.2 | 0.002 |
| PCB isolation end mill Ø 0.5 mm | 20,000 | 90 | 30 | 0.25 | 0.002 |
| PCB isolation end mill Ø 0.6 mm | 20,000 | 110 | 30 | 0.3 | 0.003 |
| PCB isolation end mill Ø 0.8 mm | 20,000 | 140 | 40 | 0.3 | 0.004 |
| PCB isolation end mill Ø 1 mm | 20,000 | 180 | 50 | 0.3 | 0.004 |
PCB drill
| Bit | SpeedRPM | Feedmm/min | Plungemm/min | Depthmm | Chip loadmm |
|---|---|---|---|---|---|
| PCB drill Ø 0.3 mm | 20,000 | 40 | 40 | 0.5 | – |
| PCB drill Ø 0.4 mm | 20,000 | 40 | 40 | 1 | – |
| PCB drill Ø 0.5 mm | 20,000 | 50 | 50 | 1 | – |
| PCB drill Ø 0.6 mm | 20,000 | 50 | 50 | 1 | – |
| PCB drill Ø 0.7 mm | 20,000 | 60 | 60 | 1.5 | – |
| PCB drill Ø 0.8 mm | 20,000 | 70 | 70 | 1.5 | – |
| PCB drill Ø 0.9 mm | 20,000 | 80 | 80 | 2 | – |
| PCB drill Ø 1 mm | 20,000 | 90 | 90 | 2 | – |
| PCB drill Ø 1.1 mm | 20,000 | 100 | 100 | 2 | – |
| PCB drill Ø 1.2 mm | 20,000 | 110 | 110 | 2.5 | – |
| PCB drill Ø 1.3 mm | 20,000 | 120 | 120 | 2.5 | – |
| PCB drill Ø 1.4 mm | 20,000 | 130 | 130 | 3 | – |
| PCB drill Ø 1.5 mm | 20,000 | 140 | 140 | 3 | – |
| PCB drill Ø 1.6 mm | 20,000 | 140 | 140 | 3 | – |
| PCB drill Ø 1.8 mm | 20,000 | 160 | 160 | 3.5 | – |
| PCB drill Ø 2 mm | 20,000 | 180 | 180 | 4 | – |
| PCB drill Ø 2.5 mm | 20,000 | 230 | 230 | 5 | – |
| PCB drill Ø 3 mm | 20,000 | 270 | 270 | 6 | – |
Corn cob bit
| Bit | SpeedRPM | Feedmm/min | Plungemm/min | Depthmm | Chip loadmm |
|---|---|---|---|---|---|
| Corn cob bit Ø 0.6 mm | 20,000 | 60 | 30 | 0.15 | – |
| Corn cob bit Ø 0.8 mm | 20,000 | 70 | 30 | 0.2 | – |
| Corn cob bit Ø 1 mm | 20,000 | 90 | 30 | 0.25 | – |
| Corn cob bit Ø 1.2 mm | 20,000 | 110 | 30 | 0.3 | – |
| Corn cob bit Ø 1.5 mm | 20,000 | 140 | 40 | 0.4 | – |
| Corn cob bit Ø 1.8 mm | 20,000 | 160 | 40 | 0.45 | – |
| Corn cob bit Ø 2 mm | 20,000 | 180 | 50 | 0.5 | – |
| Corn cob bit Ø 2.5 mm | 20,000 | 230 | 60 | 0.65 | – |
| Corn cob bit Ø 3 mm | 20,000 | 270 | 70 | 0.75 | – |
| Corn cob bit Ø 3.175 mm | 20,000 | 290 | 70 | 0.8 | – |
| Corn cob bit Ø 4 mm | 20,000 | 360 | 90 | 1 | – |
| Corn cob bit Ø 6 mm | 20,000 | 450 | 110 | 1.5 | – |
What matters with Circuit board
- Do not breathe fibreglass dust: extract it, work wet or wear a fine dust mask.
- Isolate traces with an isolation end mill or engraving bit, cut the outline with a corn cob bit.
- The board is never perfectly flat: probe the height and use height mapping so the trace width stays constant.
- Fine carbide drills break under side load: clamp the board firmly and keep the drill depth tight.
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.