Grinding wheel specification
Contrary to what you may think, the long codes associated with grinding wheels actually can be interpreted and generally have a clear meaning. Most all manufacturers will list the grit type, grit size, wheel hardness, structure and the bond in every grinding wheel produced. It is important to note that there is NO STANDARD among grinding wheel manufacturers. Each will use their own unique identifying method of marking; However, there are some common rules - at least here in China. A typical electroplated grinding wheel specification might be ‘D203.2*31.75T*15.875H*R6.35*W25.4 CBN80#. ‘D203.2 is the outside diameter, ‘31.75T is the the total thickness, ‘15.875’ is the arbor hole, ‘R6.35 is the curved shape, ‘W25.4’ is the CBN coating width. ‘CBN80’ is the grit type and grit size. Other bond grinding wheel specification might be D100-T10-H31.75-W5-X10 D64 C100'. 'D100' is outside diameter, ‘T100’ is the total thickness, ‘31.75’ is the arbor hole, ‘W5’ is the diamond coating width, ‘X10’ is the diamod coating thickness, ‘D64’ is grit type and the grit size, 'C100' is the concentration. There are variations too. For example, one might see this 'D125-T20 -H32-U3-X6. In this case, U3 is the grit coating width. There is some process done to the wheel such as slots or grooves or holes or induced porosity. Other suffixes are added by each individual manufacturer for special conditions. Only by looking at the manufacturing record or process sheet will anyone know for certain what exactly made up that particular grinding wheel - The specification alone will not tell the whole story.
As noted above, generally one cannot take a grinding wheel from one manufacturer that is marked similarly and substitute for another manufacturer's grinding wheel of equal marking. In the first place, it is highly likely they will not be marked similarly and secondly, variations in factory production methods typically make grinding wheels of different construction. Unless one is not very picky about their grinding wheel or not doing exacting work and is willing to accept some grief, we would not recommend anyone try to make substitutions without some guidance from an engineer familiar with the process and the manufacturers. This is where we come in: We work with the factories to get you the proper grinding wheel. It is also important to note that the end user should expect some TRIAL & ERROR when converting from one brand of wheel to another. Sometimes a manufacturer may need two or even three tries to finally hit on the exact hardness, grit, bond, etc.. Patience and time are key to any successful conversion and testing.