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FAULT
PROBABLE CAUSE REMEDY
PREMATURE BLADE WEAR
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
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.
BLADE BREAKAGE
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
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 arm
before starting the blade motor.
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