General Endmill Information
General Information for Endmill Usage:
The Following factors should be kept in mind when using the recommended starting feed per tooth.
Use Higher Feeds For:
- Heavy, roughing cuts
- Rigid set-ups
- Easy-to-machine work materials
- Rugged cutters
- Slab milling cuts
- Low tensile strength materials
- Coarse tooth cutters
- Abrasive materials
Use Lower Feeds For:
- Light, and finishing cuts
- Frail set-ups
- Hard to machine work materials
- Frail and small cutters
- Deep slots
- High tensile strength materials
- Fine tooth cutters
| To Calculate | Given | Formula |
| Surface Speed in Feet per Minute = SFM | Tool Dia (inches) = D | SFM= (D x 3.1416 x RPM) / 12) |
| Revolutions per Minute = RPM | ||
| Revolutions per Minute = RPM | Tool Dia (inches) = D | RPM= (SFM x 12) / (D x 3.1416) |
| Surface Speed in Feet per Minute = SFM | ||
| Feed Per Revolution in inches = FR | Feed in Inches per Minute = FM | FR = FM / RPM |
| Revolutions per Minute = RPM | ||
| Feed in Inches per Minute = FM | Feed Per Revolution in inches = FR | FM = FR x RPM |
| Revolutions per Minute = RPM | ||
| Number of Cutting Teeth per Minute = TM | Number of Teeth in Tool = T | TM = T x RPM |
| Revolutions per Minute = RPM | ||
| Feed Per Tooth = FT | Number of Teeth in Tool = T | FT = FR / T |
| Feed Per Revolution in inches = FR | ||
| Feed Per Tooth = FT | Number of Teeth in Tool = T | FT = FM / (T x RPM) |
| Feed in Inches per Minute = FM | ||
| Revolutions per Minute = RPM |