Norton JUM3 benchstone
Norton JUM3 Sharpening Stone
Product Name: Norton JUM3 Crystolon Combination Sharpening Stone (Giant Bench Stone)
The Norton JUM3 is a professional-grade combination oil sharpening stone manufactured from Crystolon® silicon carbide abrasive. It is designed for fast stock removal and general sharpening where speed is more important than achieving an ultra-polished edge. The stone features a coarse side for edge repair and shaping, and a fine side for refining and finishing the cutting edge.
Key Features
- Material: Crystolon® (silicon carbide)
- Type: Combination oil stone (coarse/fine)
- Color: Gray
- Dimensions: 11.5 in × 2.5 in × 1 in (292 × 64 × 25 mm)
- Weight: Approximately 2–3 lbs
- Recommended Lubricant: Honing oil
- Application: Knives, chisels, woodworking tools, high-speed steel tools, skate blades, and general edge tools.
Performance Characteristics
- Aggressive cutting action for rapid metal removal.
- Ideal for restoring dull or damaged edges.
- Cuts faster than India stones but wears somewhat quicker.
- Suitable for moderate sharpening tolerances rather than mirror-finish edges.
- Particularly effective on harder steels, including high-speed steel.
Grit Information
Commonly supplied as:
- Coarse side: approximately 100–120 grit
- Fine side: approximately 240–320 grit
The coarse side establishes the edge quickly, while the fine side refines it for service use.
Typical Uses
- Speed skating blade maintenance
- Sharpening chef knives and butcher knives
- Woodworking tools
- Shop and maintenance tools
- General-purpose edge restoration and sharpening.
Manufacturer Description
Crystolon combination coarse and fine grit sharp-cutting silicon carbide abrasive surfaces for general sharpening (to moderate tolerances) when the speed of sharpening is more important than the fineness of the cutting edges.
Norton Part Number: 61463685840 (JUM3)
This is one of the largest and most popular Norton bench stones, especially among speed skaters, butchers, craftsmen, and tool users who need fast, reliable sharpening performance.
MAP: $89.99