Nagura Stone for Sharpening Honing Stones, Grit 1000

Nagura stones are an essential tool used in conjunction with full-size waterstones (whetstones) of matching grit. Their primary functions are to create a sharpening slurry (lather or cream) on the surface of the whetstone, clean the pores of the stone from embedded metal particles, and flatten the working surface that has become convex or uneven with use.

The creation of a sharpening slurry is a crucial step in the sharpening process. Without a nagura, it can be challenging to establish this slurry, particularly with some natural stones and ceramic-bonded modern synthetic stones. The slurry serves to eliminate suction between the blade and the stone, preventing a skipping action that can lead to deformed or micro-chipped bevels.

By lifting and washing away the metal particles trapped within the pores of the whetstone, the nagura helps to prevent the stone from becoming "glazed" or clogged. This condition inhibits the sharpening process and reduces the effectiveness of the stone.

Another important function of the nagura is to flatten the working surface of the waterstone. Over time, the stone can become convex or warped, with the middle wearing down more than the edges. Attempting to sharpen or hone a blade on such an uneven surface can permanently damage the blade. The nagura is used to restore the flat working surface, ensuring a consistent sharpening result.

To use the nagura effectively, it should be soaked in water for 5-7 minutes before use and then stored dry. This helps to maintain the stone's performance and prevents it from becoming saturated with water, which can affect its abrasive properties.

Nagura stones are typically sized at 2.6" x 1.3" x 1.0" (65 x 33 x 25mm) and weigh approximately 3.7 oz (105 g). They are available in a range of grit sizes, with the #1000 grit being a common choice for use with sharpening stones ranging from #1000 to #3000 grit.

In summary, nagura stones are an essential tool for the serious sharpener, serving to create a sharpening slurry, clean the whetstone's pores, and maintain a flat working surface. By ensuring a consistent and controlled sharpening process, nagura stones help to extend the life of both whetstones and blades.

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