Description

Formula

Definition

ONLY FOR DRILLING INTO SOLID MATERIALS

D = External diameter

fc = Cutting force

fcz= Cutting force per tooth

Md = Torque

Pa = Driving power

Pc = Cutting performance

ap = Cutting depth

b = Chip width

d = Internal diameter

D1max = Max. external diameter

d2 = Internal diameter

f = Feed rate

fz = Tooth feed rate

fB = Process factor: drilling

fSE = Process factor: countersinking

h = Chip thickness

kc = Specific cutting force

vc = Cutting speed

z = Number of teeth

η = Level of efficiency

Cutting force per tooth

Cutting force per tooth

Cutting performance

Cutting performance

Torque

Torque

ONLY FOR COUNTERBORING AND COUNTERSINKING

Cutting force per tooth

Cutting force per tooth

Cutting performance

Cutting performance

Torque

Torque