SYMPTOM
|
CAUSE
|
REMEDY
|
Loss of tension
|
Blade being used on a misaligned saw
|
Check for proper saw alignment
|
| |
Diamond blade is excessively hard for the
material being cut, creating stress on the
steel center
|
Make certain diamond blade is correct for
material being cut
|
| |
Material slippage causing blade to twist and
become kinked or bent
|
Maintain tight grip on material while sawing
|
| |
Utilizing diamond blade flanges that are
under size or not the same diameter, creating
uneven pressure at the center
|
Make certain blade flanges are proper size
and identical diameter, minimum 3-7/8" on
concrete saws, 6" minimum on diamond
blades that are 30" and larger
|
| |
Diamond Blade being used at improper RPM
|
Make certain bladeshaft is turning at the
proper RPM by using a tachometer. This is
especially important with concrete saws
|
| |
Diamond Blade improperly mounted on arbor
shoulder becomes bent when flanges are
tightened
|
Hold blade securely on arbor shoulder until
outside flange and nut are firmly tightened.
|
Segment loss
|
The material slips during cutting which twists
or jams the segments loose.
|
Hold the material securely while cutting
|
| |
Diamond blade is too hard for the material it
is cutting, creating excessive dullness which
makes the segment pound off, or fatigue
|
Use a softer blade specification
|
| |
Worn blade flanges fail to provide proper
support and cause the blades to deflect
|
Replace both blade flanges
|
| |
Out of round diamond blade rotation resulting
in pounding, caused by worn arbor or bad
bearings in the shaft
|
Replace worn arbor and/or bearings
|
| |
Overheating can usually be detected by blue
color on steel center and generally confined
to the area where the segment was lost
|
Check the water system for blocked water
passages. Test pump to see if it is
functioning. For dry cutting, it may be
necessary to make shallower cuts and allow
the diamond blade to run freely every few
minutes in order to let the air cool it.
|
Cracked segments
|
Diamond blade is too hard for material being
cut
|
Use correct diamond blade with softer bond
|
Eccentricity
|
The bond is too hard for the material being
cut. The hard bond retains the diamonds,
and they begin to round off, causing the blade
to become dull. Instead of cutting, the
diamond blade begins to pound causing the
blade to wear "out of round"
|
Change to a softer bond, which will wear
away more readily allowing the dull
diamonds to be released and sharp, new
cutting edges to become exposed
|
| |
The saw bladeshaft may have a groove
scored in it, caused by a blade spinning
between the flanges. A new diamond blade,
installed on the arbor shaft, will seat into the
groove, and immediately run eccentrically
when the saw starts
|
Replace worn shaft
|
| |
If the bladeshaft bearings are worn, the shaft
and mandrel will run eccentrically, causing
the blade to wear out of round. This happens
most often with concrete saws when proper
lubrication of the bearings is neglected
|
Install new bladeshaft bearings. In some
cases it might also be necessary to replace
the bladeshaft if it is worn or out of alignment.
|
Overheated blade
|
Adequate coolant was not applied
|
Check the water supply for adequate volume
and for obstructions in the water system.
Use dry blades ONLY for shallow cutting 1-2"
deep or step cutting. Allow diamond blade to
run freely every 10-15 seconds in order to
increase cooling airflow
|
Arbor hole out of round
|
Saw arbor badly worn due to improperly
seated blades
|
Be certain the blade is properly seated on
arbor before tightening flange
|
| |
Blade flanges not properly tightened
permitting blade to rotate on shaft.
|
Always wrench tighten the arbor nut. Never
hand tighten. Always use hex nuts, never use
wing nuts
|
| |
Blade flanges or arbor shaft worn and not
providing proper blade support
|
Check blade flanges or arbor shaft for wear.
Both flanges should be no less than that
recommended by the manufacturer. Replace
worn parts
|
Diamond blade won't cut
|
Diamond blade is too hard for materials
being cut
|
Consult dealer or manufacturer for proper
blade to cut materials on job
|
| |
Diamond blade has become dull because of
continuous use on fairly hard or vitrified
material
|
Dress with abrasive material until diamonds
become exposed again. This may be
necessary occasionally, but if dullness
occurs, blade is too hard for material
|
| |
Diamond Blade segments appear to still
have plenty of life, but blade won't cut
|
Some harder bonded diamond blades
designed for abrasive materials require a
non diamond bearing section at the base of
the diamond segment for better adherence to
the steel core. A diamond blade used to this
stage has worn out in the normal manner
and should be replaced
|
