- 18 -
FAULT
PROBABLE CAUSE
REMEDY
PREMATURE BLADE WEAR
BLADE BREAKAGE
Faulty
running-in
of
blade
Teeth
positioned
in
the
direction
opposite
the
cutting
direction
Poor
quality
blade
Too
fast
advance
Wrong
cutting
speed
Defects
on
the
material
or
material
too
hard
Insufficient
lubricating
refrigerant
or
wrong
emulsion
Faulty
welding
of
blade
Too
fast
advance
Wrong
cutting
speed
Wrong
tooth
pitch
Ineffective
gripping
of
the
part
in
the
vice
Blade
touching
material
at
beginning
of
cut
Remedy
See "Material classification and blade
selection"
in
the
Blade running-in
section.
Turn
teeth
in
correct
direction.
Use
a superior
quality
blade.
Decrease
advance,
exerting
less
cutting pressure.
Adjust
the
braking
device.
Change
speed
and/or
type
of
blade.
See
chapter
on
"Material classification
and blade selection
,”
in the section
Blade selection table according to
cutting and feed speed.
Material
surfaces
can
be
oxidized
or
covered
with
impurities
making
them,
at
the beginning
of
the
cut,
harder
that
the
blade itself,
or
have
hardened areas
or
inclusions
inside
the
section
due
to
productive
agents
used
such
as
casting
sand, welding
wastes,
etc.
Avoid
cutting
these materials
or
perform
cutting with
extreme
care,
cleaning and
remove such
impurities
as
quickly
as
possible.
Check
level
of
liquid
in
the
tank.
Increase the
flow
of
lubricating
coolant,
checking
that
the coolant nozzle and
pipe are not blocked
.
Check
the
emulsion
percentage.
The
welding
of
the
blade
is
of
utmost
importance.
The
meeting
surfaces
must
perfectly
match
and
once
they
are
welded they
must
have
no
inclusions
or
bubbles; the
welded
part
must
be
perfectly
smooth and
even.
They
must
be
evenly
thick
and have
no
bulges
that
can
cause
dents
or instant
breakage
when
sliding
between the
blade
guide
pads.
Decrease
advance,
exerting
less
cutting pressure.
Adjust
the
braking
device.
Change
speed
and/or
type
of
blade.
See chapter on "Material classification
and
blade selection",
in
the
section
Blade selection table according to
cutting and feed speed.
Choose
a suitable
blade.
See
Chapter
"Material classification and blade
selection.”
Check
the
gripping
of
the
part.
At
the
beginning
of
the
cutting
process,
never
lower
the
saw bow
before
starting the
blade
motor.
