ALUMINIUM OXIDE 'V-30 BOND' is suitable for griding mild steel and for general use on workshop tools. Dry operation off-hand

ALUMINIUM OXIDE 'V-10 BOND' is suitable for precision griding of mild steel, corbon steel, alloy steel, manganese steel amd hardened steel (wet griding operation)

ALUMINIUM OXIDE 'V-8 BOND' is suitable for surface and cylindrical griding of H.S. steel and hardened steel. Gives excellent result on tool and cutter griding. In fact when it is impretive to grind with the minimum of hear generation, this abrasive should be used.

SILICON CARBIDE is most efficient for griding materials of low tensile sternght such as cost iron, bross copper, aluminiuam, glass porelain, marble, granite etc.

SILICON CORBIDE GREEN '(GC)' is recommended for griding of tungsten carbide tipped tools.

ALUMINIUM OXIDE (DA) V-10Bond is recommended for intenal griding.

The significant difference between cylindrical grinding of internal & surfaces is the Wheel to Work conformity. In Internal grinding, on account of grinding of internal surfaces the arc of contact and thereby the conformity between the wheel and work-piece, is substantially higher.

In Internal Grinding, high Wheel-Work conformity results in
Large number of grains in contact with the work-piece > Lower Force per unit grain
Grain and bond fracturing gets hampered due to low Force per grain and can lead to more rubbing and sliding of the abrasive while grinding (Glazing)
Poor coolant availability in the grinding zone
The work material debris (chips) have a higher probability to be entrapped between the wheel and the work, leading to their increased frictional effect
High heat generation due to poor lubricity, higher friction and iability to remove heat effectively from grind zone.