rpmThe spindle only reaches {max} rpm: the actual cutting speed is {vc} m/min.With this radial engagement the chip gets thinner: to keep the maximum chip thickness equal to fz you can raise the feed up to {fz} mm/tooth.The required power exceeds the spindle power entered: reduce ap, ae or the feed.Deep hole: beyond 5×D use a long drill with internal coolant and a pilot hole.Above 45 HRC you are in ISO group H (hardened steels): dedicated end mills and grades are needed.Value outside the conversion table.steelshardened steelsInserts and end mills for steelEnd mills for hardened steels
INNOT tools
Milling calculator
Diameter, number of flutes, cutting speed and feed per tooth are in the INNOT end mill datasheets: here you get spindle speed, table feed, metal removal rate, power and torque, with chip-thinning correction.
Cutting data
mm
n°
m/min
The recommended value is in the cutting data table of the end mill or insert.
mm/tooth
mm
mm
Used to estimate specific cutting force (kc), power and torque.
rpm
kW
Results
Spindle speed (n)
–
Table feed (Vf)
–
Metal removal rate (Q)
–
Average chip thickness (hm)
–
Cutting power (Pc)
–
Torque (Mc)
–
Engagement angle
–
Formulas: n = 1000·Vc / (π·D) · Vf = n·z·fz · Q = ap·ae·Vf / 1000 · hm = 2·fz·ae / (D·φ) with φ = arccos(1 − 2·ae/D) · Pc = ap·ae·Vf·kc / (60·10⁶·η) with kc = kc1·hm−mc and efficiency η = 0.8. Power and torque are estimates for a 90° shoulder mill: actual values depend on geometry, wear and material.
