How To Order 

  • 1. General Information

    1.1  Diamond and CBN Grinding wheels

    Diamond and CBN are defined as super hard materials due to their extremely hardness that surpassws the traditional abrasive materials like Aluminum oxide or silicon carbide.

    Diamond and CBN Wheels are widely used in high effective grinding processes and offer substantially benefits over traditional wheels.

    The main advantage of diamond and CBN wheels:

    • Very long tool life and profile stability
    • Short grinding times
    • Short handling times
    • Lack of thermal damage to the workpiece
    • Ensure appropriate workpiece quality

    1.2  Diamond applications

    Diamond is the hardest abrasive material in the world.

    Its hardness, wear and thermal resistance made the diamond the most appropriate abrasive to machining such materials as:

    • Hard metal
    • Cermet
    • Hard metal/steel combinations
    • Glass
    • Quartz
    • Ceramic materials of all kinds
    • Ferrotitanite
    • Carbide-based powder coating
    • Graphite
    • Polycrystalline diamond and CBN blanks
    • Ceramic magnetic materials
    • Glass and carbon-fibre reinforced synthetic materials
    • Tungsten Carbide

    1.3  CBN applications

    CBN is the second material after diamond. CBN is produced similarly to the diamond by high pressure and high temperature aynthesis. Due to their chemical features and considerable lower wear, CBN tools are used for grinding such hard-to-process steels as:

    • Hardened high-speed steel (HSS)
    • High alloyed steels with at least 55 HRC
    • Case-hardened steels
    • Iron-based powder coatings
    • Chill castings
    • Soft steels in certain applications
    • Stellite

    1.4  CDX applications

    CDX is a special superabrasive material with the performance between diamond and CBN. It is mainly used to grind the compound of hard&fragile material (like TCT) and Ferrous material (like Chilled steel). 

     

  • 2. Diamond and CBN grit size

    The chosen grit size affects the performance of the wheel determing the stock remove rate and surface finishing that can be achieved coarser grit size enables higher material removal rate and rougher surface finishing, while a fine grit size is used for attaining a smoother surface finishing.

    2.1 Standard Diamond and CBN grades

    FEPA 
    Grit Designation
    ANSI
    US Standard Mesh
    D/B 251
    60/70
    D/B 213
    70/80
    D/B 181
    80/100
    D/B 151
    100/120
    D/B 126
    120/140
    D/B 107
    140/170
    D/B 91
    170/200
    D/B 76
    200/230
    D/B 64
    230/270
    D/B 54
    270/325
    D/B 46
    325/400
    D/B 40
    400/500
    D/B30
    500/600
    D/B 25
    800
    D/B 20
    1000
    D/B 15
    1200
    D/B 10
    1600

    2.2 Diamond and CBN Micron Powder grades

    Grain Size(um)
    ANSI
    US Standard Micron
    50
    400
    45
    500
    35
    600
    30
    700
    25
    800
    20
    1000
    17
    1100
    15
    1200
    12.5
    1400
    11
    1500
    10
    1600
    9
    1800
    7.5
    2200
    6
    3000
    5
    5000
    4
    6000
    3
    8000
    2.5
    10000
    2
    12000
    1
    14000
    0.5
    28000

     

  • 3. Superabrasive grit size and Workpiece surface finish

    Surface finish is affected by a number of variables, including machine type and condition, type of material, coolant, wheel speed and bond system. As such, this chart should only be used as general guideline.

    Grit Size(mesh)
    Ra(um)
    80
    0.55-0.75
    100
    0.40-0.55
    120
    0.35-0.40
    150
    0.30-0.35
    180
    0.25-0.30
    220
    0.22-0.25
    240
    0.18-0.22

    Grit Size(mesh)
    Ra(um)
    320
    0.17-0.18
    400
    0.14-0.18
    500
    0.14-0.15
    600
    0.12-0.15
    800
    0.07-0.12
    1200
    0.05-0.10
    1500
    0.025-0.05

     

  • 4. Truing and Dressing

    Truing and Dressing are necessary for keeping your superabrasive grinding wheel in ultimate working condition.

    Truing gives the grinding wheel its geometrical accuracy and makes it run true while dressing opens up the grinding wheel, and exposing the abrasive grit by clearing away bond material from around the cutting edges.

     

  • 5. Order Example

    The schedule of wheel ordering is as follows:

    • Wheel shape, dimensions of abrasive layer, wheel body dimensions and the bore must be defined in order to avoid misunderstanding;
    • Depending on grinding performance type of super abrasive, concentration and grain size must be defined.
    • Working conditions (wet or dry grinding), have to be determined.

    If ordering the grinding wheel, it is also advisable to charaterise the kind of material to be ground, type of grinder and other criteria that could affect the grinding result.

    Example below shows how to order:


    Click image to enlarge


    Click image to enlarge