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The bit data file can only be used with the specified Genmitsu item number. Using this file with other brands is dangerous for the operator and the CNC machine.
Here are the formulae used for some feed and speed calculations, not really necessary but if someone starts talking about Surface speed or MRR this explains the calculations.
Values:
Bit Diameter |
The diameter of the cutting edge of the bit |
Spindle Speed |
Rotation speed of the bit in RPM |
Flutes |
The number of cutting edges on the bit |
Feed Rate |
The rate the bit is moved into the stock in a straight line |
V Bit Angle |
For V bits only the angle between the edges of the V it will leave. Only used in the V and ball depth and width calculators. |
Depth of Cut |
How deep the finished cut will be. Only used in the V and ball depth and width calculators. |
Cut Width |
How wide the top of a finished cut will be. Only used in the V and ball depth and width calculators. |
Stepover |
The distance the bit moves horizontally between cuts. |
Stepdown |
The distance the bit moves vertically between cuts. |
Formulae:
Measurement units can be inches or mm, feeds in inches/min or mm/min but they cannot be mixed, the results will be in the units used.
Bit Circumference |
Bit Diameter * π |
Surface Speed |
Bit Circumference * Spindle Speed |
Cutting Speed |
Surface Speed * Flutes |
Chip Load |
Feed Rate / (Spindle Speed * Flutes) |
Feed per Cut |
Feed Rate / Flutes |
V Width |
tan(V Bit Angle/2) * 2 * Depth of V + Tip Diameter |
V Depth |
(V Width – Tip Diameter) / (Tan(V Bit Angle/2) * 2) |
Material Removal Rate (MRR) |
Feed Rate * Stepover * Stepdown |
As you can see all these calculations can rapidly become circular, they are all using the same few basic parameters and are often only slightly different ways of expressing basically the same thing.