Grit Material Type
Each grit material has
different attributes, such as brittleness and hardness. When choosing a
grit material, take into account the qualities associated with that grit
material for the intended application. In some cases, two grit
materials are blended to offer qualities intermediate to those materials
alone. For example, aluminum oxide is durable, but silicon carbide is
aggressive. A blend of silicon carbide and aluminum oxide would be more
durable than silicon carbide alone, and more aggressive than aluminum
Aluminum oxide is a widely used and versatile
abrasive material. It is a tough, fracture- and wear-resistant grit that
works well with a broad range of materials, from metals to wood.
Aluminum oxide is more durable than silicon carbide and often used for
material removal and finishing.
Silicon carbide is a sharp, aggressive grain that
offers high penetration, fast cutting, and high material removal even
under light pressure. It is commonly used with softer materials like
brass, plastics, and rubber, and abrasive materials like glass and
enamel, but can wear out faster that aluminum oxide when used on wood.
- Zirconia alumina is a
self-sharpening abrasive that allows for a faster cut rate and longer
life than aluminum oxide, due to its ability to fracture and refracture,
creating new cutting edges. Zirconia alumina is often used for high
stock removal on wood and metals.