Общий каталог Tungaloy 2020 - 2021 - страница 1663

Drilling Tools B

Nomenclature for Indexable drill

Overall length C Shank length Shank Central insert Maximum drilling depth Flange diameter

D

Peripheral insert E Flute Flange Peripheral insert Central insert Peripheral insert

F

Cutting zone of Cutting zone of

central edge peripheral edge G

Calculation formulas for Indexable drill H Cutting speed When calculating cutting speed from number of revolutions: (Drilling formulas) v ： Cutting speed (m/min)

c

D D ： Drill diameter (mm)〔DC〕 I

n ： Number of revolution (min-1) π 5 3.14 When calculating required number of revolutions from cutting speed: (Drilling formulas) J

D

D When calculating cutting speed from number of revolutions: (Where the workpiece rotates.) v ： Cutting speed (m/min)

D c K

D ： Drilling diameter (mm)〔DC〕 n ： Number of revolution (min-1) π 5 3.14 When calculating required number of revolutions from cutting

speed: (Where the workpiece rotates.) L

D

Calculation of feed speed M v ： Feed speed (mm/min) f f ： Feed (mm/rev) n ： Number of revolution (min-1)

〔 〕The notation in the brackets is the one used in the catalog (ISO compliant)