SYMPTOM |
CAUSE |
REMEDY |
Loss of tension |
The blade is being used on a poorly aligned saw.
|
Correct the alignment of the saw.
|
| |
The blade is too hard in relation to the material
being cut, which causes excessive
stress on the steel plate.
|
Ensure that the blade is suitable
for the
material being
cut (consult the selection
table or see your distributor). |
Slippage of the material causes
deformation
of the blade which twists or bends.
|
Hold the material firmly while sawing. |
The use of flanges which are too small or
not of the same diameter causes unequal
pressure on the steel plate.
|
Ensure that the flanges are of the right size
and the same diameter.
|
|
The blade is being used at the wrong
speed of rotation.
|
Check whether the spindle is rotating at
the correct speed using a tachometer. This
precaution is particularly important for concrete
saws. |
|
The blade is poorly fitted onto the spindle
and bends when the flanges are tightened.
|
Hold the blade on the spindle until the outer
flange and the nut have been firmly
tightened. |
|
The steel plate heats up due to friction because
of too rapid or uneven wear of the
rim.
|
Use a blade with a greater side-clearance
or of another specification more suited to |
¡°Undercutting¡±
There is ¡°undercutting¡± when the steel plate wears
more rapidly than the diamond segment, particularly
at the joint between the segments and the
steel plate. |
This situation is caused by grinding of the
blade by very abrasive materials during
sawing. It is usually materials with a high
sand content which are responsible for this
type of wear (see section ¡°Loss of
segment¡±). |
The abrasive slurry must be dispersed over
a greater area, away from the critical zone
of the segment. Very often, it is sufficient
to use protective segments placed on the
steel plate to modify the areas constantly
subject to abrasion. |
| |
|
Although they are effective in the majority
of cases, these segments do not give total
protection. Use a high flow of water to remove
the slurry. |
With a floor saw, when cutting in one pass
through more than the total thickness of
the material, the cooling water escapes
from the cutting line and this causes the
blade to overheat.
|
Adjust the depth of cut so that there remain
a few millimetres of material uncut; this will
hold the colling water in the kerf. |
The segments are worn on one side only,
which reduces the side-clearance. This
wear is generally caused by bad alignment
of the blade or by inadequate cooling on
both sides of the blade.
|
Check the saw alignment. Clean the cooling
device, ensure the front edge of the
flange is correctly cooled. Check that the
pump is supplying water in sufficient quantities
and regularly. (See section ¡°Excessive
wear¡± below). |
The blade has lost its circular shape because
of wear caused by poor bearings, a
worn spindle, by dirty or damaged flanges
or even by excessive baulking. (See section
¡°Excessive wear¡± below).
|
Replace the bearings or the worn spindle
as necessary: do not remove the drive pivot
pins when supplied with the flanges. |
