We process all orders within 1 to 5 business days, with delivery times varying based on your location and shipping method selected at checkout. Once your order has shipped, you'll receive a confirmation email containing your tracking information, which becomes active within 24 hours. Please note that orders are not processed on weekends or public holidays, and shipping times may be extended during periods of high order volume. Any customs duties, import taxes, or related fees are the responsibility of the customer. If your order arrives damaged, please retain the original packaging and contact the shipping carrier to initiate a claim as soon as possible.
Commercial Grade Sharpening Stone Engineered for Precision Edge Restoration
The Naniwa Chosera Whetstone SS-400 Grit 400 is purpose built for demanding sharpening environments where consistency, durability, and precision are essential. Designed for restoring dull or damaged cutting edges, this professional grade whetstone delivers controlled material removal while helping establish a clean, uniform bevel for subsequent fine sharpening stages. Its premium stone composition offers reliable performance for chefs, knife makers, and serious enthusiasts who require dependable edge maintenance.
Technical Specifications & Engineering Data
| Specification Metric | Commercial Field Tested Data |
|---|---|
| Manufacturer Brand | Naniwa |
| Model / Series Line | Chosera SS-400 |
| Stone Material | Premium Synthetic Water Stone |
| Grit Rating | 400 Grit |
| Color | Blue |
| Exact Physical Dimensions | 11.81 × 3.54 × 1.97 inches |
| Item Weight | 1 kg |
| Lubrication Type | Water Lubricated |
| Recommended Application | Edge Restoration, Bevel Formation, Initial Sharpening |
| Commercial Suitability | Designed for Professional and Enthusiast Sharpening Applications |
Core Operational Features
- Professional Edge Restoration: The 400 grit abrasive efficiently removes fatigued steel, repairs minor edge damage, and quickly restores cutting performance without excessive material loss.
- Premium Synthetic Composition: Manufactured from high quality engineered abrasive materials that promote consistent cutting action, excellent feedback, and dependable wear characteristics throughout repeated sharpening sessions.
- Stable Sharpening Surface: The dense stone structure maintains a predictable sharpening feel while helping produce accurate bevel geometry and uniform edge development.
- Excellent Water Performance: Designed for water lubrication, allowing smooth sharpening action while minimizing heat generation and carrying away metal particles for improved cutting efficiency.
- Precision Controlled Abrasion: The carefully engineered abrasive matrix offers an ideal balance between cutting speed and edge control, making it suitable for preparing knives before progressing to finer finishing stones.
Professional Applications
Ideal for commercial kitchens, culinary schools, butcher shops, knife maintenance stations, and dedicated home workshops, the Naniwa Chosera SS-400 excels at restoring neglected edges, removing small chips, reshaping bevels, and preparing premium kitchen knives for higher grit polishing stones. It is compatible with a wide variety of kitchen, outdoor, and utility knives requiring professional level edge maintenance.
Why Professionals Choose the Naniwa Chosera SS-400
Professionals value the Chosera series for its exceptional cutting efficiency, consistent abrasive performance, and outstanding sharpening feedback. The SS-400 provides an excellent foundation for complete sharpening systems, allowing damaged or heavily worn blades to be restored quickly before refinement on medium and polishing stones. Its durable construction and predictable performance make it a trusted choice for users who demand repeatable, high quality sharpening results.
Care & Maintenance
Use clean water during sharpening and rinse the stone thoroughly after each session to remove accumulated metal particles and abrasive residue. Allow the whetstone to air dry completely before storage, and periodically flatten the sharpening surface with an appropriate lapping plate or flattening stone to maintain optimum sharpening accuracy and long term performance.