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.

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

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

7).Knowing About Concrete
A.Compressive Strength
Concrete Hardness
Very hard -Nuclear Plants; Hard -Bridges, Piers; Medium -Roads;
Soft -Sidewalks, Patios, Parking lots ;B.Length of curing time,
State 1.
Green Concrete- 0 to 8 hours after the pour but not hardened completely. Typically, sawing control joints of highways, industrial flooring, driveways, runways and similar projects is performed during this state. In this state the sand in the mixture has not bonded to the mortar blend firmly and will cause extreme abrasive action once cutting begins so it is necessary to use hard bond and under-protection segment for the steel core of the diamond blade.

State 2
Semi-cured concrete- 8 to 24 hours after the pour. Generally, control joints established in State 1 are widened during this time.A slightly softer bond is required.
State 3
Cured concrete- 24 to 72 hours after the pour. The sand is held firmly in the mortar mixture.In this state it is important to consider of the aggregates, hardness and steel content of the concrete factors in determining proper diamond-blade selection.
C. Aggregates
In the concrete 60 to 75% are aggregates. They influence the way both green and cured concrete perform. Aggregates can be naturally occurring minerals, sand and gravel, crushed stone or manufactured sand. The average size and composition of aggregates greatly influence the cutting characteristics and selection of the diamond blade. Large aggregates cause blades to cut slower; smaller aggregates allow the blades to cut faster.
Hard aggregates shorten blade life and reduce cutting speed.
D.Sand composition :
o River Sand (round nonabrasive)
o River Bank Sand (sharp abrasive)
o Manufactured Sand (sharp abrasive)
River Bank Sand and Manufactured Sand are more abrasive than River Sand. The more abrasive the sand is, the harder the bond-matrix requirements. Sharper, more geometrically defined sands also require harder bonds.
5. Steel Reinforcement
Reinforcing steel bars (rebar) are steel wire strand of wire meshing into the concrete. It costs more to cut concrete that contains reinforcing steel because cutting rates are slower and blade life is reduced. If the cross-sectional area of concrete is 1% steel, the blade life will be about 25% shorter than if no steel were present.