Carbon Fibre preset for the CNC Feeds & Speeds Calculator: 4-flute diamond. Pre-filled inputs Material carbon-fibre, Tool Diameter 6, Flutes 4.
Pre-filled Inputs
Exact preset input values
Material
carbon-fibre
Tool Diameter
6
Flutes
4
Surface Speed
250
Chip Load
0.025
Governing Formulas
Engineering formulas used by this calculator
Expression
Result
n = (Vc × 3.8197) / D
Spindle speed (rpm)
F = n × z × fz × kt
Feed rate (mm/min)
MRR = ae × ap × F
Material removal rate
P = MRR × kp
Cutting power (kW)
Frequently Asked Questions
How is spindle speed calculated for a CNC endmill?
Spindle speed uses n = (Vc × 3.8197) / D, where Vc is the surface speed in m/min and D is the tool diameter in millimetres.
What is radial chip thinning and when does it apply?
When the radial width of cut is below half the tool diameter, each tooth removes a thinner chip, so the feed rate is multiplied by a chip-thinning factor kt.
How do I check the cut against my machine limits?
The calculator compares spindle speed, cutting power and tool deflection against the configured machine limits and flags the result Compliant or Review.