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blade will not cut
- possible causes / remedies:
- the bond is too hard for the materials being cut;
- number of revolutions might be too high
- Efficiency of the machine is too low (insufficient H.P.) for the
specification being used.
- The machine‘s drive belts need to be retensioned.
- Glazed blades can be reconditioned by cutting a soft, abrasive
material.
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rapid wear
- The bond is too soft for the materials being cut causing the
diamond grit to become over-exposed: Use a blade with a
harder bond.
- Loose drive belts causing intermittent revolutions
- Insufficient water supply caused by blocked or damaged water
inlets
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UNDERCUTTING: The effect of early wear of a steel blank is a
particular problem with highly abrasive materials such as asphalt and
green concrete. The steel blank wears off just below the welding seam
of the segment which may result in losing the segment.
- Ensure the blade has a protection segment to assist in the
removal of the slurry and protect the steel centre.
- When cutting asphalt, be careful not to let the blade cut into the
layer underneath, as this will cause early wear on the cutting
wheel and can be dangerous.
- Check water supply, as increased water flow will help to wash
the slurry from the blade and reduce undercutting.
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univen segment wear
- Wet cutting:insufficient or irregular water supply, generally on
one side of the blade: Rinse water supply system and ensure
that the water is equally supplied to both sides of the blade.
- worn bearings or driving shaft: Repair or replace bearings and/
or shaft.
- segments which are worn out only on one side produce side
clearance: check alignment.
- Check wheels and wheel alignment on floor saws and carriage
alignment on masonry bench saws.
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CRACKS in the SEGMENT
- The bond is too hard for material being cut: Use a blade with a
softer bond.
- rotational speed of the blade might be too high
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CRACKS in the BLANK
- the bond is too hard for the material being cut
- excessive cutting pressure, causing the blank to bend and flex
- insecure mounting, causing the blade to flutter
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segment loss
- The material was not held firmly, causing the blade to twist or
jam whilst cutting.
- The machine was being moved whilst cutting.
- The bond is too hard for the material being cut.
- Flanges are worn out or deformed and fail to provide proper
support, causing the blade to deflect whilst cutting.
- Dirt between the flange and the blank causes the blade to
flutter, which may result in segment loss.
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OVERHEATING: A common cause for blade failure. Overheating can
cause many other problems such as loss of tension, cracks in the
blank and segment loss. A sign for overheating is a black or blueish
discolouration of the steel blank.
- Inadequate water supply can be caused by blocked or damaged
feed inlets.
- A trickling feed to supress dust dispersion can cause excessive
abrasion.
- Do not push the blade too hard, let it cut freely.
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UNEVEN HEIGHTof the SEGMENTS
- worn out bearings and/or driving shaft: replace bearing and
ensure regular lubrication.
- The bond is too hard for the material being cut: Choose a blade
with a softer bond.
- The machine‘s spindle may have a score grooved in it as a
result of the blade having previously slipped on the spindle.
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