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Boring formulae

Cutting Speed, (Vc)

Spindle Speed, (n)

Feed per revolution, (F)

feed per revolution formula by preziss

Feed rate, (Vf)

Fn 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