OIL STONE
An oil stone is a type of sharpening stone, often made of fine-grained stone like novaculite (Arkansas stone) or synthetic materials like aluminum oxide, that is lubricated with oil to sharpen cutting tools. The oil prevents metal filings from clogging the abrasive surface, allowing for a consistent and durable sharpening process that maintains the stone’s flatness. They are used for putting a final, keen edge on tools by grinding away metal through abrasion.
Key characteristics
- Material: Can be natural (like novaculite/Arkansas stone) or synthetic (like aluminum oxide or silicon carbide).
- Function: Puts the final edge on tools by using a fine-grained abrasive surface.
- Lubricant: Requires honing oil as a cutting fluid to prevent the abrasive surface from clogging with metal particles.
- Durability: Wears down slowly and holds its flatness for a long time compared to other stones, such as water stones.
- Hardness: Is generally a harder stone, which contributes to its durability and slower wear, though this also means it removes material more slowly than softer stones.
- Grit: Available in a range of grits (coarse, medium, and fine) for different sharpening needs.
