| Diamond
Tools ->
Select a Diamond Tool |
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The
buyer is solely responsible for the correct selection
of correct use of the diamond tools. The claims
are invalid in case of incorrect selection or misuse
or not observing to safety instructions.
It is the fact that 99.9% of problems are caused
by operate error and not product failure. Our blades
should not fail if used correctly.
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1.What
is a Diamond Blade
A diamond blade is composed of the circular steel
core and the diamond-impregnated segment. The segments
separated by slots in the core. These slots assist
in cooling the blade during sawing by allowing water
(wet cutting) or air (dry cutting) to flow between
the segments.
The segments or rims are a mixture of diamond powders
and metal powder. The diamonds are industrial diamonds
of different sizes and qualities depending on the
material to be cut and blade type. During the process
the metal powder and diamond powders are compressed
at very high temperature and pressure to obtain
the bond, which retains the diamond, grain.
2.How to make a diamond
blade
1). Laser Welding: laser micro-fusion enables
the segment to be welded to the core. The bond
is the most powerful, it enables the tool to be
used for dry cutting and drilling without segment
loss.
2). Brazing: silver brazing solder melts at high
temperature between the segment and the core and
binds the two elements together. This used for
wet cutting, drilling and grinding.
3).Sintering: It divides into two
A.Cold pressed -Sintered:First pressed with press
machine under normal circumstances, then laid
in sinter machine under high pressure and temperature
making the compressed metal powder to melt to
a solid bond.
B.Hot pressed: pressed with hot press machine
under high temperature and pressure, making the
compressed metal powder to melt to a solid bond.
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Processing Method
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Binding Strength of the segments
(rim) and the steel core
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Wet Cutting
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Dry Cutting
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Laser Welded
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Hot Pressed
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Brazed
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Cold Pressed-Sintered
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Process method
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Cost
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Productivity
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Life
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Speed
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Dry or Wet
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Cold pressed Silntered
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wet
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Hot pressed
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Dry or Wet
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Laser welded
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Dry or Wet
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Brazed
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Wet
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Cold Presse
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Sintered
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Hot Pressed
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Laser Welde
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Brazed
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3.How
does a diamond blade work
The individual diamond crystals exposed on the leading
edge and the sides of the segment or rim carry out
the cutting (in fact it is milling)
The operator pushes the rotating blade into the
material. The surface diamonds thus exposed mill
a groove in the material, reducing it to fine powder.
When the blade mills the material, the latter exerts
wear on the blade.
During cutting the exposed diamonds may crack or
break. The material simultaneously starts to abrade
the metal matrix, which gradually releases more
diamonds. The more abrasive the material, the more
rapid the tendency to wear down the matrix.
Blades for cutting hard, dense less abrasive materials
(such as tile, hard bricks, stone or cured concrete),
require a softer metal matrix. This will wear down
faster, replacing the worn diamonds fairly quickly
so that the blade continues to cut.
Blades for cutting soft, abrasive materials (such
as green concrete and asphalt) must have a hard,
abrasion-resistant metal matrix in order to retain
the diamonds for a long time.
4.How to selecting a diamond
tool
When choosing a diamond tool you should follow
under step by step:
Step 1: How to use
-Cutting or Drilling or Grinding
Be sure that cutting blade is deadly dangerous
to use for grinding and making a hole. You should
not take the risk just to save meaningless small
money using one blade doing all the work.. Please
refer to the detail content in the brochure.
Step 2: What kind
a machine to use on
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Cutting
Machine
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Wall Saw
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Tile Saw
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Hand Saw
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Angle Grinder
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Grinding
Machine
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Cut-off
Saw
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Concrete
Saw
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Drilling
Machine
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Step
3: Blade Usage --How often you will use it
and how long a life and how fast a cutting speed
you required
a). Professional Purpose: for large civil engineering
construction on a regular daily basis, require long
life (less expensive per cut/meter) and fast cutting
speed.
b).Builder's (contractor ) Purpose: for regular
use with medium life, fast cutting speed no need
the same life of a professional blade.
c).DIY Purpose (trade): for small scale occasional
use, require fast cutting speed and reasonable life
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d).Promotional Purpose: Cut well with water but
with short life.
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Professional(Lager scale use)
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Builder (Contractor)
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DIY(Trade)
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Promotional
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Life
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Cutting Speed
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Initial Buying Price
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Cost(Meter Per Cut)
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Step
4:Blade Purpose-Consider what materials you
to be cut
Asphalt; Concrete; Brick; Block; Stone; Tile or
General Purpose(this type can cut many of the materials,
but can not get the best performance as special
professional ones).
If you want a blade that will cut both granite and
asphalt well then you will need to buy two different
blades. You cannot expect the blade to work correctly
and safely on both materials. The blade will either
become blunt and overheat or it will wear very quickly.
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Application
Chart (Recommend Blade Selection)
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Blade Purpose
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| Cutting Materials |
Granite |
Tile Marble |
Cured Concrete
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Abrasive Products |
AsphaltGreen Concrete Asphalt
over Concrete |
General Purpose (Buildilng Materials) |
Multi-use Contractors |
DIY
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| Granite |
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Engineering blocks
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Very hard engineering bricks
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Concrete over 50kn
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| Clay paviors |
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| Hard clay pipes |
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| Ceramic tiles |
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| Porcelain tiles |
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| Clay roof tiles |
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| Marble |
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| Medium facing bricks |
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| Hard slate |
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| Flint concrete |
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| Concrete kerbs |
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| Concrete slabs |
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| Concrete lintels |
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| Concrete paviors |
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| Soft facing bricks |
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| Block paviors |
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| Concrete blocks Over 15kn |
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| Soft slate |
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| Concrete roof tiles |
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| Hard sandstone |
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| Medium sandstone |
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| Coarse sandstone |
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| Shallow concrete Screed cutting |
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| Asphalt over concrete |
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| Concrete blocks15kn |
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| Breeze blocks |
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| Limestokne/granite Asphalt |
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| Hard asphalt(With flint aggregates) |
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| Green cokncrete |
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| Very abtrasive asphalt |
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| Very abrasive lignacite Blocks |
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Step
5:Blade Type: A continuous smooth rim provides
the smoothest cut in ceramic tiles and ornamental
stone. Turbo type blades or segmented turbo type
may produce slight chipping but generally have a
longer life and lower cost per cut than continuous
rim blades. Segmented blades provide the longest
life and lowest cost per cut but are only suitable
for work where chipping is not a problem.
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Segment
Type/ Turbo Type /Continuous Rim Type Diamond Blades
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Segment Type
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Turbo Type
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Continuous Rim Type
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Life
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Cutting
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Edge&Corner Chipping
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Cost(Meter Per Cut)
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Step
6:The Price: For small jobs, or occasional
use, a low-priced tool may be preferable. For larger
jobs or regular use, a higher-priced tool will actually
be less expensive to use because it will deliver
a lower cost per cut. For really big jobs, the lowest
possible sawing cost (cost per meter) is usually
much more important than the initial price.
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Professional(Lager scale use)
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Builder(Contractor)
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DIY(Trade)
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Promotional
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| Life |
++++
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+++
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++
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| Cutting Speed |
++++
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++++
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+++
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Initial Buying Price
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++++
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+++
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Cost(Meter Per Cut)
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Step
7: Wet or Dry Operation (Please refer to
the detail requirement in the brochure): wet products
must be used with water to keep the segments cool
during operation. Water also assists the product
to perform at its max. efficiency. Cutting without
water on the products will cause excessive heat,
resulting in poor performance and blades damage
in the form of cracks in the steel center. For concrete
floor saws, wet cutting is usually preferred because
you can cut deeper when using water as a coolant.
For tile and masonry saws, either wet or dry cutting
tools can be used.
Dry products must be cooled with airflow around
the tool to dissipate the heat. Dry cutting blades
are only recommended for intermittent cutting. Every
10-15 seconds the blades should be allowed to rotate
out of the cut at maximum rpm for several seconds
to allow the blade to cool. Operators should not
use dry diamond blades for long continuous full
depth sawing in one single pass. Any cuts deeper
than 4 cm should be step cutting make several shallow
passes until the required depth of cut is reached.
On asphalt, operators should avoid cutting into
the sub-base of roads as this will cause rapid wear
of the segments. Overheating should be avoided particularly
when cutting steel reinforced materials such as
lintels. Forcing the product into the application
is the most common cause of overheating. If signs
of overheating are present, such as blue discoloration
at the segment and core, then the blade will require
redressing. Forced cutting of hard aggregates, or
hard low abrasive materials can reduce the cutting
ability of the blade. The operator should dress
the diamond blade by using it in a soft abrasive
material such as sandstone or abrasive blocks which
will then restore the cutting properties.
For high-speed cut-off saws, dry tools are more
popular, but they are often used wet to control
dust. Wet tools and bits MUST be used with water.
Dry cutting tools may be used either dry or wet,
as the job or equipment allows.
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Step 8: If you are
not sure about the blade selection, please contact
our sales technical department :0086-755-82468382
or 0086-511-6673858
5.Some additional information
of diamond blades
1).The diamond segment or rim width and height:
Diamond tool segment width and height by itself
is not a true measure of a tool's value. Other
factors also affect the performance of the tool,
such as the diamond size, diamond concentration
and diamond grade, the hardness of the bond, the
cutting power (torque) of the equipment; the segment
and slot geometry of the steel core, and how well
the blade specification and best of all the correct
choice of the blades is matched to the material
being cut.
2).The appearance exposure of the segment or rim:
do not judge only by the appearance exposure :
due to the mixing and sharpening process, sometimes
a high grades segment looks less quantity and
small diamond size, but in fact it is perfect
inside.
Bigger diamond size and high concentration do
not mean good quality, you should also consider
of the diamond grade, the bond etc.
3).High diamond concentration may not be of high
performance, which depend on many other factors
such as diamond grade, grit ,bond,blade type ,materials
cut, etc. Sometime unsuitable high diamond concentration
will cause the segment blunt and can not cut in
the material.
4)Blade performance: The most common problem encountered
by diamond blade users is blade wear. It is also
the most difficult to accurately evaluate .It
is impossible to predict the life performance
5)Diamond Blade Cutting Guidelines
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