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Commercial Grade Coarse Sharpening Stone Engineered for Fast Edge Restoration
The Naniwa Chosera Whetstone SS-400 Grit 400 is built to handle demanding edge restoration and primary sharpening tasks in professional kitchens, workshops, and sharpening stations. Engineered with Naniwa's premium abrasive technology, this coarse grit water stone removes material quickly while maintaining exceptional sharpening consistency, making it ideal for restoring dull or damaged blades before progressing to finer finishing stones.
Technical Specifications & Engineering Data
| Specification Metric | Commercial Field Tested Data |
|---|---|
| Manufacturer Brand | Naniwa |
| Model / Series Line | Chosera SS-400 |
| Material Composition | Premium Synthetic Sharpening Stone |
| Stone Type | Professional Water Whetstone |
| Grit Rating | #400 Coarse |
| Color | Blue |
| Exact Physical Dimensions | 3.54 × 1.97 × 11.81 Inches |
| Product Weight | 1 kg |
| Recommended Lubrication | Water Only |
| Commercial Application | Edge Restoration, Bevel Formation, Primary Knife Sharpening |
Core Operational Features
Aggressive Edge Restoration: The #400 grit is engineered for rapid material removal, making it highly effective for repairing chipped edges, restoring dull blades, and establishing new bevels before refinement.
Premium Abrasive Performance: Manufactured using Naniwa's high quality synthetic abrasive technology, the stone delivers fast cutting action with consistent sharpening performance across the entire working surface.
High Density Stone Construction: Designed for demanding professional use, the dense abrasive composition offers excellent durability while helping maintain a stable sharpening surface through repeated sharpening sessions.
Controlled Material Removal: Despite its aggressive cutting ability, the stone provides excellent tactile feedback, allowing users to maintain precise sharpening angles and consistent edge geometry.
Professional Grade Reliability: Built to withstand continuous use in commercial environments, the SS-400 provides dependable performance for both routine maintenance and complete edge restoration.
Professional Applications
The Naniwa Chosera SS-400 is ideal for professional chefs, knife sharpening specialists, culinary schools, woodworkers, and serious enthusiasts. It excels at restoring chef's knives, Japanese kitchen knives, outdoor knives, woodworking tools, and other precision cutting instruments that require significant edge repair or coarse sharpening before progressing through finer grit stones.
Why Professionals Choose It
Professionals trust the Naniwa Chosera series for its fast cutting speed, consistent abrasive performance, and outstanding durability. The SS-400 serves as an excellent starting point in a complete sharpening progression, delivering efficient edge restoration while laying a precise foundation for finer sharpening and polishing stages.
Care & Maintenance
Use clean water as the sharpening lubricant before and during sharpening. Rinse the stone thoroughly after each use to remove metal particles and abrasive residue, then allow it to dry naturally before storage. Periodically flatten the sharpening surface to maintain consistent contact and optimal sharpening accuracy. Store the stone in a clean, dry environment to maximize its long term performance and service life.