Hapstone Premium CBN is a new series of CBN stones for sharpening knives using guided knife sharpeners (Hapstone, TSPROF, and other Edge Pro-compatible sharpening systems). Hapstone Premium CBN utilizes advanced hybrid metal-polymer binder – composite of traditional copper-tin alloy and polymer components. Hybrid binder inherits exceptional wear resistance and cutting performance of metallic binder.
CBN (Cubic Boron Nitride) is the second-hardest material after diamond. Hapstone Premium CBN consists of a 3 mm thick CBN-bearing layer mounted on a premium black aluminum blank.
CBN’s qualities include high levels of high hardness, strength, abrasion resistance, and thermal and chemical resistance. These characteristics exceed the values of synthetic diamonds and conventional abrasives such as silicon carbide and aluminum oxide. In particular, CBN’s high thermal stability and chemical resistance make it suitable for sharpening in conditions where synthetic diamonds are not normally employed.
CBN offers excellent performance in sharpening knives of any steel. Due to its high resistance specs, CBN can be used dry without lubricant. This makes CBN the cleanest of the available sharpening stones.
| Grit | Micron | Purpose |
|---|---|---|
| 50 grit | 250um-315 um | Optional |
| 80 grit | 160um-200 um | Optional/Alternative |
| 120 grit | 100um-125 um | Recommended as #1 |
| 150 grit | 80um-100 um | Optional/Alternative |
| 240 grit | 40um-50 um | Optional/Alternative |
| 400 grit | 28um-40 um | Recommended as #2 |
| 600 grit | 20um-28 um | Optional/Alternative |
| 1000 grit | 10um-14 um | Recommended as #3 |
| 2000 grit | 5um-7 um | Optional/Alternative |
| 4000 grit | 3um-5 um | Recommended as #4 |
| 5000 grit | 2um-3 um | Optional/Alternative |
| 8000 grit | 1um-2 um | Recommended as #5 |
How to Use
Attention! Hapstone Premium CBN stones may seem bald out-of-the-box. This is by design.
Hapstone Premium CBN can be used without lubricants.
Premium CBN stones may become darker over time due to natural metal oxidizing. It does not affect the sharpening.
Premium CBN stones do not require any preparations.
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