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Bonds

The diamond and CBN grinding wheels are manufactured using resin, ceramic or metal bonds. The choice of the bond depends on:

  • heat conductivity
  • conditions of the machine
  • shape and dimension of the tool
  • roughness required
  • material to be worked

 

The correct bond holds the grit until it is optimally worn. When the grit becomes blunt and loses its sharpness the bond releases it and gives way to new, sharper grits. This ideal bond agglomeration is the basis of the self-dressing effect of our wheels, easily recognised through the comet-tail-shaped cutting edges behind each grit. Insufficient bond holding causes high wheel wear because the grits are released too quickly on coarse surfaces. On the contrary, excessive holding generates high temperature and pressure: the wheel clogs and loses its free cutting ability. Bonds are designated as follows:

 

Resinoid bonds

These bonds are prepared with synthetic materials of various characteristics. Products based on phenol-formaldehyde, resins and polyimide. High removal, dry grinding and short grinding times are the advantages of this bond: more than 50 % of the abrasive tools used today are made with this bond. The bond type is chosen and modified or integrated according to the working requirements. A wide range of bonds allows the optimum choice for individual applications.

Resinoid bond chart

Diamond wheels Diamond bond wet dry
High-performance grinding, creep-feed-grinding, profile grinding, rim width ≤ 5 mm B371  
High performance grinding, creep-feed-grinding, rim width 4–8 mm B361  
High performance grinding, rim width 7–20 mm B351
Universal bond for high performance grinding B100
Grinding of hard metal and steel combinations on welded and sprayed alloys grinding on HSS tools B261
Universal bond for tool grinding up to 40 m / sec peripheral speed B185
For wheels with a very malleable body B171  
Centerless grinding with wide contact surface between wheel and workpiece B402  

 

CBN-Wheels CBN-Bonds wet dry
Extremely hard bond, high performance grinding, rim width ≤ 5 mm B971  
Profile grinding, wear-proof bond profiles B966  
High performance grinding with 1A1-shaped wheels, horizontal and external grinding B956  
Flute grinding of HSS-tools B861  
Universal bond for tool grinding up to 40 m / sec peripheral speed B850
For wheels with a very malleable body B761  
Centerless grinding with wide contact surface between wheel and workpiece B761