Symbol

Designation

Unit

a

setting width

mm

B

wear-land width

mm

b

width

mm

C

sound velocity

m · s^-1

D

ball diameter

mm

d

diameter

mm

F_N

normal force

kp

F_R

force of sliding friction

kp

F_Rmax

force of static friction

kp

f

coefficient of sliding friction

-

f_o

coefficient of static friction

-

H

hardness

MPa

H

calorific value

KJ · kg^-1

HB

Brinell hardness

MPa

h

tooth height

mm

1

length

mm

M_bmax

bending moment

N · m

Mt

torque

N · m

m

weight

g or kg

m_o

weight at a moisture of 0 %

g or kg

m_u

weight at the moisture content u

g or kg

n

speed

rpm

S

sound absorption

%

S

tool path

m

s

thickness

mm

T

tool life

h

t

pitch

mm

t_F

flash point

°C

u

moisture content of wood

%

u

feed rate

min^-1

V

volume

cm³ or m³

V_o

volume at a moisture of 0 %

cm³ or m³

V_u

volume at the moisture content u

cm³ or m³

v

cutting speed

m · s^-1

W

moment of resistance

cm³

w_t

cutting path

m · h^-1

x

cutting edge reset

mm

a

coefficient of heat transfer

kJ · m^-2 · h^-1 · K^-1

a

tool orthogonal clearance

º

a₁

longitudinal swelling

%

a_r

radial swelling

%

a_t

tangential swelling

%

b

sound absorption

phon or decibel

b

tool-orthogonal wedge angle

º

b₁

longitudinal shrinkage

%

b_r

radial shrinkage

%

b_t

tangential shrinkage

%

g

tool orthogonal rake

º

d

cutting angle

º

e

angle of point

º

e_B

drill point angle

º

h

thermal resistance

m² · h · k · kI^-1

c

setting angle

^º

l

tool cutting edge inclination

^º

r

density

g · cm^-3 or kg · m^-3

r

specific electrical resistance

W cm

r_o

oven-dry density

g · cm^-3 or kg · m^-3

r_u

density at the moisture content u

g · cm^-3 or kg · m^-3

s_bB

bending strength

MPa

s_dB

compressive strength

MPa

S_zB

tensile strength

MPa

t_aB

shear strength

MPa

t_tb

torsional strength

MPa

(||)

resistance to tensile strengths parallel to the grain direction

(^)

resistance to tensile strengths vertically to the grain direction