List of Symbols Used

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
FN	normal force	kp
FR	force of sliding friction	kp
FRmax	force of static friction	kp
f	coefficient of sliding friction	-
fo	coefficient of static friction	-
H	hardness	MPa
H	calorific value	KJ · kg-1
HB	Brinell hardness	MPa
h	tooth height	mm
1	length	mm
Mbmax	bending moment	N · m
Mt	torque	N · m
m	weight	g or kg
mo	weight at a moisture of 0 %	g or kg
mu	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
tF	flash point	°C
u	moisture content of wood	%
u	feed rate	min-1
V	volume	cm3 or m3
Vo	volume at a moisture of 0 %	cm3 or m3
Vu	volume at the moisture content u	cm3 or m3
v	cutting speed	m · s-1
W	moment of resistance	cm3
wt	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	%
ar	radial swelling	%
at	tangential swelling	%
b	sound absorption	phon or decibel
b	tool-orthogonal wedge angle	º
b1	longitudinal shrinkage	%
br	radial shrinkage	%
bt	tangential shrinkage	%
g	tool orthogonal rake	º
d	cutting angle	º
e	angle of point	º
eB	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
ro	oven-dry density	g · cm-3 or kg · m-3
ru	density at the moisture content u	g · cm-3 or kg · m-3
sbB	bending strength	MPa
sdB	compressive strength	MPa
SzB	tensile strength	MPa
taB	shear strength	MPa
ttb	torsional strength	MPa
(||)	resistance to tensile strengths parallel to the grain direction
(^)	resistance to tensile strengths vertically to the grain direction