Poltava Premium Metallic CBN Stone 6" x 1"


JIS Grit: 120


Abrasive Cubic boron nitride
Available Grits 📊 Grit Chart
120 JIS XC
240 JIS C
400 JIS M
600 JIS M
1000 JIS F
2000 JIS F
4000 JIS EF
5000 JIS EF
8000 JIS UF
15000 JIS UF
Bonding Copper-tin alloy metal
Country of Origin Ukraine
Extra Material Mounted on aluminum blank
Form Factor Edge Pro
glgc cbn2-metallic
Series Premium
Thickness of Abrasive 3 mm
Total Thickness 6 mm
Working Surface 152 x 25 mm (6" x 1")


Metallic CBN Sharpening Stones from Poltava Diamond Tools are used for sharpening knives using guided knife sharpeners (Hapstone, TSPROF, and other Edge Pro-compatible sharpening systems). CBN (Cubic Boron Nitride) is the second-hardest material after diamond. Metal bonded CBN stones utilize copper-tin alloy bonding for high endurance and low wearing rate.

The Premium series of Metallic CBN consists of a 3 mm thick CBN-bearing metal plate mounted on a high-quality aluminum blank. Premium series utilizes CBN grain made in the USA.

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.

Metallic CBN can be used without lubricants.

Metallic CBN stones may have tone imperfections. Metallic CBN may become darker over time due to natural metal oxidizing, it does not affect the sharpening.

Metallic CBN stones do not require any preparations.

Grit Micron Purpose
📈80 grit 200-250 um Optional/Alternative
📈120 grit 100-125 um 🔢Recommended as #1
📈240 grit 40-60 um Optional/Alternative
📈400 grit 28-40 um 🔢Recommended as #2
📈600 grit 20-28 um Optional/Alternative
📈1000 grit 10-14 um 🔢Recommended as #3
📈2000 grit 5-7 um Optional/Alternative
📈4000 grit 3-5 um 🔢Recommended as #4
📈5000 grit 2-3 um Optional/Alternative
📈8000 grit 1-2 um 🔢Recommended as #5
📈15000 grit 0-1 um Optional/Alternative