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When selecting sharpening stones, understanding the grit classification and the type of processing is essential.
When selecting sharpening stones, understanding the grit classification and the type of processing is essential. This whetstone grit guide will provide an overview of various grit types, their descriptions, and applications.
Grit size refers to the number of abrasive particles per inch of the sharpening stone. Smaller numbers indicate a coarser grit that removes material faster. On the other hand, larger numbers represent a finer grit that produces a smoother surface. It is for this reason that the grit classification of abrasive materials is important when choosing the right grit diamond or cbn.
Types of Processing:
Extra Coarse (60, 80, 100 Grit):
Ideal for heavy-duty sharpening tasks and very dull tools.
Fastest metal removal but leaves very visible scratches.
Coarse (160, 225, 240 Grit):
Suitable for dull blades needing substantial sharpening.
Removes material quickly with less prominent scratches.
Medium (285, 300, 325 Grit):
Good for general sharpening and regular maintenance.
Provides a balance between material removal and edge refinement.
Fine (550, 650 Grit):
Minimum recommended for the final stage of most knives.
Refines edges after medium grit, creating a good finish with minimal scratches.
Very Fine (1100, 1500 Grit):
Used for achieving a very sharp edge.
Leaves a frosted appearance on the edge.
Extra Fine (1700, 3000, 4000 Grit):
Ideal for achieving a highly refined and polished edge.
Produces a near-mirror finish, suitable for precision tools and knives.
Ultra Fine (5000, 10000, 15000 Grit):
Used for creating a mirror finish and the sharpest edge possible.
Extremely slow sharpening but results in a flawless edge.
How to Choose Sharpening Stone Grit Levels:
Selecting the appropriate grit level is crucial depending on the condition of your blade and the desired outcome:
Extra Coarse (60-100 grit): Best for repairing damaged or very dull blades.
Coarse (160-240 grit): Suitable for dull blades needing substantial sharpening.
Medium (285-325 grit): Ideal for regular maintenance and intermediate sharpening.
Fine (550-650 grit): Used for refining the edge to a sharp and smooth finish.
Very Fine (1100-1500 grit): Perfect for achieving a very sharp edge.
Extra Fine (1700-4000 grit): Ideal for achieving a polished and highly refined edge.
Ultra Fine (5000-15000 grit): Used for creating a mirror finish and the sharpest edge possible.
Understanding the knife sharpening grit chart and diamond grain color chart is crucial for selecting the right sharpening stones. Choose the appropriate grit based on the condition of your blade and desired sharpness, using the visual guidance provided by the diamond stone color chart
Oleksandr Doroshenko
Oleksandr Doroshenko is the leader and principal expert at UKSG Tools, a Ukrainian manufacturer of specialized sharpening and grinding instruments. Under his leadership, the company focuses on high-precision solutions using diamond and CBN abrasives, blending advanced technologies with the craftsmanship of the country’s finest domestic producers.
