Hapstone CBN Recommended Stones Set
Hapstone CBN sharpening stones are made from cubic boron nitride (CBN), also known as elbor. CBN is one of the hardest abrasive materials available and is ideal for sharpening modern high-hardness steels.
Hapstone Premium CBN stones use a metal-organic bond, which provides wear resistance close to metal bonds while offering smoother and more controlled sharpening.
The set also includes Hapstone Start Series electroplated CBN stones, designed for aggressive material removal and fast reprofiling.
All stones are mounted on blanks made of high-quality aircraft aluminum.
Grit Progression
The set includes the following stones:
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Hapstone Start CBN (150 µm) — 100 grit
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Hapstone Start CBN (70 µm) — 220 grit
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Hapstone Premium CBN (40/28 µm) — 400 grit
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Hapstone Premium CBN (20/14 µm) — 800 grit
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Hapstone Premium CBN (10/7 µm) — 1500 grit
Benefits of Hapstone Premium CBN Stones
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Comfortable sharpening — the stones are durable yet smooth in operation. They are often compared to Japanese water stones but are significantly more durable.
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Low maintenance — CBN stones do not require soaking or special preparation and can be used without cutting fluids.
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Delicate edge processing — CBN crystals have an octahedral structure with multiple cutting edges, which allows efficient sharpening while minimizing deep scratches.
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Consistent stone dimensions — all stones share the same size (150 × 24 × 5 mm with a 3 mm working layer), allowing grit progression without adjusting the sharpening angle.
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High performance — excellent sharpening efficiency is achieved thanks to 100% concentration of CBN1 abrasive grain.
Specifications
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Hapstone Premium CBN working layer: 150 × 24 × 3 mm (6 × 1")
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Hapstone Start CBN working layer: 150 × 24 × 1,5 mm
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Hapstone Premium CBN blank size: 160 × 24 × 5 mm (6 × 1")
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Hapstone Start CBN blank size: 160 × 24 × 3 mm
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Hapstone Premium CBN bond: Metal-organic
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Hapstone Start CBN bond: Electroplated (galvanic)
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Material: CBN (cubic boron nitride)
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Concentration: 100%
Recommended Finishing
For final polishing we recommend using Hapstone Poly Diamond Suspension:
