Name: Naniwa Specialty Stone, SP-491, grit: 12000
Brand: Naniwa
SKU: NASP-491
Availability: OutOfStock
Rating: 4.647725 (44 reviews)

Naniwa flattening block, grain 220, A120

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High quality Japanese water stone
Grit: 12000
Dimensions: 21.0x7.0x1.0 cm
Own import so very inexpensive!

Let us hone your decision-making skills to select the perfect sharpening tools!

Are your knives in need of sharpening?

The Naniwa Specialty Stone-series is the improved version of the well-known Super Stones-series. Naniwa has renewed the binding agent of the water stones. It is unique that Naniwa itself takes care of the production of the binding agent. Optimal matching to the grit size is important. The result of this is that the sharpening properties of Naniwa water stones are significantly better than sharpening stones of other brands even though the grit size is comparable. The Specialty Stones are hard sharpening stones so it is not very likely that your knife will 'bite' into the stone. Also the wear of the stone is minimal; they have a very long lifespan. However, it is advisable to regularly clean the sharpening stone with a 'dressing stone'.  
  


The Specialty Stones are synthetic resin-bound. The absorption of water is minimal so you only have to wet them and you can immediately start the sharpening process. They do not have to be submerged. The water stones will wear very slowly during the sharpening process. The advantage of this is that the stone cleans itself, as it were. Despite the 'wear' a Specialty Stone will have a very long lifespan.  
  

**About the grit size**
Sharpening stones are delivered with several grit sizes. The larger the number, the finer the grit. The finer the grit, the sharper the sharpening result. You start the sharpening process with a coarse grit and then continue with a finer grit. Steps of a factor two to three between the different grit sizes are ideal.  
  

**Indication for the selection of the correct sharpening stone:**


* Grit 200 to 600: suitable for repairing the cut of blunt knives

* Grit 800 to 1000: suitable for the sharpening of knives that are in a good condition

* Grit 2000 to 3000: for a sharper sharpening result than the condition in which many new knives are delivered

* Grit 5000 to 12000: for the sharpening of knives into a razor sharp condition 




Naniwa Specialty Stone, SP-491, grit: 12000

series

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Great stone for the price, cuts fast. polishes well. But with most high grit stones it clogs up verry fast. So a dressing stone is handy for this one. It is verry thin and really smooth feeling. Gets my filetting knives scary sharp combined with a fine compressed leather strop. All in all a really good polishing stone for the peice. Mirror finish without a question

I bought this stone to hone a straight razor. Its provided a mirror finish to the edge, with a quick strop it will cut hair without any pressure needed. I can't wait to move my lower grit stones to a higher quality that Naniwa holds. 

Von den vielen Japanischen Banksteinen und auch jeden anderen Banksteinen, die ich bis jetzt getestet und verwendet habe, ist das der BESTE Schleifstein den ich je verwendet habe. Es geht darum, wie effektiv der Stein arbeitet. Man sieht sofort wie Material abgetragen wird, jedoch ist die Metalloberfläche sofort glänzend, was man ja bei 12.000er Körnung auch erwartet. Es sieht so aus als ob man nicht mit Metall sondern mit Bleistift auf dem Stein schleift. So ein hervorragendes Ergebnis in so kurzer Zeit habe ich bis jetzt noch nicht erreicht.
Ich bin einfach begeistert!

warranty

Almost all the products we sell come with a manufacturing warranty. Want to learn more about the warranty? Read our topic: [warranty explained](/en/ct/warranty-explained.htm)

Warranty

origin

The country of origin is the country the product is produced, as far as we know. This may differ from the country where the brand itself is located.

Country of origin

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General information

value_height_usable_part

The height/thickness of a sharpening stone (excluding a potential base).

Height usable part

value_length_useful_part

We always weigh a product as bare as possible. Knives and axes always without their sheath, lights (if possible) without their battery. For knife sets we measure the entire weight. This may deviate from the manufacturer's specifications.

Weight

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Dimensions & weight

The material that gives the sharpening stone its abrasive effect. Diamond, ceramics (e.g. aluminium oxide or silicon carbide) or the materials in a natural stone. Read [more about the advantages and disadvantages of these materials](/en/ct/sharpening-stone-materials-which-are-the-best.htm).

Abrasive

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The agent that brings all the abrasive particles in a sharpening stone together. The cohesive agent usually consists of natural products, such as cellulose, wax, clay and even magnesium, or synthetic products such as: polyacrylates, polyvinyl alcohol or various synthetic resins. The cohesive agent itself usually has no abrasive effect.

Cohesive agent

Material

fixed_sharpening_angle

* No: the device has a variable adjustable sharpening angle.  
* Yes: the device has one fixed, non-adjustable sharpening angle.

Fixed sharpening angle

The grain size a supplier gives to its sharpening stones. Please note: This can be either in FEPA-F (European), ANSI (American) or JIS (Japanese). Read [more about the different grain sizes here](/en/ct/expressing-grain-sizes-sharpening-stones.htm).

Grit according to supplier

stone_acc_type

stone_guides

Sharpening guides help you maintain the right angle when sharpening your knives. [Read more about using sharpening guides here](/en/ct/use-of-sharpening-guides-on-whetstones.htm).

Delivered with sharpening guides

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Some sharpening stones need to be submerged, others only need a splash of water and some need no water at all! For the best results, check in advance what is best for your sharpening stone.

Use with water

Features & functions

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A holder/base that ensures the stone doesn't move during the sharpening process.

Reviews for Naniwa Specialty Stone, SP-491, grit: 12000

Reviews for Naniwa Specialty Stone, SP-491, grit: 12000

Reviews

Average rating

Reviews for Naniwa Specialty Stone, SP-491, grit: 12000