Somta - page 142

132

USEFUL FORMULAE

rpm = Surface Speed (metres/min) ÷

Dia (mm) X

1000

Surface Speed (metres/min) =

X rpm

Dia (mm) X

1000

Feed Rate (mm/rev) =

Feed rate (mm/min

rpm

Penetration rate (mm/min) = rpm X feed rate (mm/rev)

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