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The Essentials of Edge-Sharpening Grit Levels
View the guide below to help understand the various grit levels for whetstone sharpening. This guide aims to clarify how different grit levels can help you achieve your desired edge-sharpening goals.
For most knife owners aiming for a high-quality, “above average” factory edge, stones at level 5 and level 7 are usually sufficient. However, if you are dealing with a knife that has a heavily damaged edge, beginning with stones below level 5 is recommended. These coarser stones are designed for substantial metal removal. On the other hand, stones above level 7 are geared towards achieving an extremely fine and polished edge, albeit with marginal sharpening improvements.
The Levels Explained:
Level 1: Extremely Coarse
- Description: Provides the fastest metal removal rate with very visible scratches on the cutting edge.
- Approximate Grit: Under 150 Grit
Level 2: Coarse
- Description: Very fast metal removal with visible scratches on the edge.
- Approximate Grit: 150 – 220 Grit
Level 3: Medium Coarse
- Description: Fast removal rate, less visible scratches. Finest recommended for dull tools and knives.
- Approximate Grit: 220 - 300 Grit
Level 4: Medium
- Description: Good removal rate with light edge scratching.
- Approximate Grit: 300 - 400 Grit
Level 5: Medium Fine
- Description: Medium removal rate, frosted edge appearance. Ideal for initial sharpening.
- Approximate Grit: 400 - 600 Grit
Level 6: Very Fine
- Description: Provides a modest sharpening rate with an above-average factory edge finish.
- Approximate Grit: 600 - 1000 Grit
Level 7: Extra Fine
- Description: Slow sharpening rate, resulting in a very sharp, polished edge.
- Approximate Grit: 1000 - 2000 Grit
Level 8: Extremely Fine
- Description: Offers minimal sharpening improvement, resulting in an extremely sharp edge.
- Approximate Grit: 2000 - 6000 Grit
Level 9: Near Mirror Polish
- Description: Delivers a nearly perfect polished edge visible to the naked eye.
- Approximate Grit: 6000 - 10,000 Grit
Level 10: Mirror Polish
- Description: Achieves the sharpest edge possible with an extremely slow sharpening rate.
- Approximate Grit: 10,000+ Grit
Conclusion
Understanding the different levels of whetstone sharpening allows you to precisely tailor your sharpening process to suit your needs. Whether you're restoring a damaged knife or polishing an edge to perfection, choosing the right grit level is key to achieving optimal results. Remember, while finer grits offer lesser perceptible sharpening benefits, they are crucial for those seeking the ultimate edge reflectivity and sharpness. Happy sharpening!