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Drilling formulas

Cutting Speed, (Vc)

Spindle Speed, (n)

Feed per revolution, (F)

feed per revolution formula by preziss

Feed rate, (Vf)

Fn formula by preziss

Drive power, (Pmot)

Drive power formula by preziss

Metal removal rate, (Q)

Q Metal removal rate formula by preziss

n   -                             Speed                                     - rpm
Dc -                             Cutter diameter                   - mm - inch
ap -                             Depth of cut                         - mm - inch
ae -                             Width of cut                          - mm - inch
Z   -                             Number of teeth                  - pcs
Vc -                             Cutting speed                       - m/min - ft/min
Vf -                              Feed rate                               - mm/min - inch/min
Fz -                             Feed per tooth                      - mm - inch
Q -                              Metal removal rate              - Cm3/min - inc3/min
Pmot -                       Drive power                           - KW - HP
hm -                          Medium chip thickness        - mm - inch
Kc -                            Specific cutting force            - N/mm2 - N/inch2
η   -                            Efficiency of machine           - (0,7 - 0,95)
K   -                            Approach angle                     - º
φs -                            Engagement angle               - º
φ1 -                            Up-cut milling area              - º
φ2 -                            Synchronus milling area     - º
Kc -                             Specific cutting force           - N/mm2 - N/inc2
y   -                             Reverse engagement           - mm - inch

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Boring formulas