Description
SUEHIRO RIKA #5000 Sharpening Stone:
- A professional-grade polishing whetstone
- Faster wear than CERAX series
- Longer soaking time stone (5 min. and up)
- Sold with a mounting stand. Can be conveniently sharpened when placed on any flat surface
- The set also includes a Nagura conditioning stone
*What is Nagura?
Nagura conditioning stone is a dry clay lump not used directly. It’s designed to cover the smoother stone surface with clay slurry for more effective sharpening from the start, even though the RIKA forms slurry rather quickly – the Nagura is still included . Before sharpening, rub the soaked Nagura on the sharpening stone surface and begin sharpening. Nagura won’t be needed in the further sharpening process.
Specifications:
- Stone dimensions: 206 × 73 × 23 mm
- Complete set dimensions: 256 × 90 × 55 mm
- Abrasive: White aluminium oxide
- Grit: #5000
- Weight: 900 g
Usage Instructions:
- Before use, soak for 5-15 min. in lukewarm water
- Sharpen with consistent pressure, trying to utilize the entire stone surface
- Periodically flatten the stone (every few sharpenings) using a flattening plate or sandpaper placed on a flat surface (e.g., glass)
- Before sharpening, rub the sharpening stone surface with a soaked Nagura, then begin sharpening. During further sharpening, Nagura will no longer be needed
Notes:
- Not recommended for use with oil or other petroleum products for lubrication, as this may damage the stone’s binder – stones are designed for use with water only
- Not recommended to be kept submerged in water for long-term storage








