Husqvarna 3120K - Manual (Page 11)

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11
SAFETY INSTRUCTIONS
Using diamond blades
Proceed as follows:
• Let the blade rotate in the same direction as the arrow
indicates.
• Cool continually with water.
• Keep the blade sharp.
• Remove the blade when transporting the cutter.
Avoid:
• Running the blade in the wrong direction.
• Forcing a dull blade or wedging the blade into a cut.
• Transporting the cutter with the blade fitted.
• Letting the blade fall on the work piece.
Dry diamond blades
Dry diamond blades are a new generation of blades that do not
require water cooling. However, the blades are still damaged by
excessive heat. It is good economics to let the blade cool by
simply lifting the blade from the cut every 30–60 seconds and
let it rotate in the air, for 10 seconds to cool.
!
WARNING!
Cool a diamond blade continously with water
to prevent overheating, which can cause the
blade to break and pieces being thrown off
resulting in injury and damage.
Specifications for fitting blades
Standard blades inches .787 7/8 1
centre hole (spindle) mm 20 22,2 25,4
Reducing bush* Max. thickness Blade thickness
Min thickness 3 mm (1/8")
Backing pad Material Highly compressible,
(Must be used) e.g. blotting paper
Max. thickness 0,5 mm (.020")
Spindle hole/ Play 0,2 mm (.010")
drive shaft
Flange tightening The blade does not slip, flange not bent
Blade/guard Check that the blade runs free of the
guard.
* Plastic reducing bushes may only be used with abrasive
blades. Do not use reducing bushes with diamond blades or
tungsten carbide tipped blades. We recommend that the
spindle is replaced so that it fits the blades to be used rather
than using a reducing bush. Contact your service workshop
for details.
Guard
Check that the guard is not
cracked or shows signs of any
other damage. Clean the
inside of the guard before
fitting a new blade. Check that
the guard can be adjusted.
Diamond blades
Diamond blades are basically made in the same way as
abrasive blades but are manufactured from industrial diamonds
held together by a bonding agent.
Low cost per
cutting opera-
tion. Less blade
changes.
Constant cutting
depth. Less
dust. Increases the
blades service
life. All brickwork,
reinforced
concrete and
other
composite
materials.
NOT
recommended
for metal.
DIAMOND BLADE TYPES AND USES
Diamond General char- Material Water cooling
blade acteristics
Cutting blades
Type of cutting blades
Check that the blade is
approved for the same or
higher speed according to the
aproval plate of the engine.
Do not exceed the maximum
working speed stated on the
blade.
Damage
• Ensure the blade it not
cracked or damaged in any
other way.
• Test the blade by hitting it
gently with a piece of wood.
If the blade does not give a
full-sounding ring then it is
damaged.
• Never use a blade that has
fallen on the floor.
Assembly
• Check that the blade is
fitted correctly and is
secure.
• Follow all specifications in
the table below.