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Details
Product Specs & Technical Highlights
- Primary SKU: 85840
- Manufacturer Model ID: JUM3
- Abrasive Material: Silicon Carbide (Crystolon) — Known for being the fastest-cutting man-made abrasive.
- Dimensions: 11.5" L x 2.5" W x 1" H (Marketed as 12-inch class).
- Grit Configuration: Combination Coarse/Fine.
- Coarse Surface: 120 Grit (for rapid stock removal and repairing damaged edges).
- Fine Surface: 320 Grit (for edge refining and daily maintenance).
- Factory Pre-Filling: The stone is oil-filled at the factory to reduce the amount of lubricant needed during initial use.
- Country of Manufacture: Mexico.
- Chef Feedback on Lubrication: While compatible with water, professional sharpeners prefer food-grade mineral oil with this stone. The oil keeps the silicon carbide pores open and prevents 'glazing' (metal particles clogging the stone), extending the life of the abrasive significantly.
- Trade-offs: Silicon carbide is very hard and fast but leaves a toothy, aggressive edge. For fine-dining vegetable work, you may wish to follow this stone with a 1000+ grit waterstone to polish the bevel.
When We Recommend the Norton JUM3
Who it Fits Best
High-volume professional butchers, meat processors, and chefs using large-format German or American steel knives (HRC 54-58).
Where it Excels
This stone is the gold standard for heavy repair. If you have a knife with a chip or a completely blunted edge, the 120-grit Crystolon side will fix it faster than almost any other benchstone on the market.
Professional Comparisons
It is much more aggressive and faster-cutting than a standard King or Shun waterstone, but it produces a coarser finish that is better for utility tasks than for delicate sushi or sashimi work.
Chef Feedback
"Pro butchers love the weight of the JUM3; it stays put on the bench. The extra length allows for a long, fluid stroke which helps maintain a perfect 20-degree angle on a 10 or 12-inch blade."
Trade-offs & Considerations
Because it is an oil stone, it is messier than a waterstone. It also wears slightly faster than ceramic stones due to the aggressive nature of the silicon carbide grains.
Additional Info
| Grit | No |
|---|---|
| SKU | 85840 |
| Brand | Norton |
| Country of Manufacture | Mexico |
| Manufacturer's Part Number | JUM3 |
| Manufacturer's Suggested Retail Price | No |
