Graef CX 110 Electric Knife Sharpener (Black, Diamond Discs)

Can this sharpener handle both Japanese and European knives?

Yes, the CX 110 excels with Japanese knives at their native 15° angle and can convert European knives from 20° to 15°. The conversion process initially requires several passes to establish the new angle, but once completed, your European knives will achieve the superior sharpness associated with Japanese blade geometry. This makes it particularly valuable for people who own mixed knife collections.

How long do the diamond discs last before replacement?

Diamond discs typically last for thousands of sharpening cycles due to their exceptional hardness and wear resistance. Unlike traditional grinding wheels that wear away during use, diamond particles maintain their cutting ability throughout their lifespan. Most users find the discs last several years of regular domestic use, making the initial investment highly cost-effective compared to professional sharpening services.

What's the difference between the two sharpening phases?

Phase one reshapes and establishes the correct 15° angle, removing any damage or irregularities from the blade edge. Phase two refines and polishes the edge to achieve maximum sharpness. This systematic approach ensures consistent results whilst removing minimal material. The two-phase system prevents over-sharpening and extends blade life compared to single-stage sharpeners.

Is it safe for expensive Damascus or high-carbon steel knives?

The controlled material removal and precise angle control make it suitable for premium knives including Damascus and high-carbon steel blades. The diamond discs work effectively on all steel types without generating excessive heat that could damage tempered edges. However, always start with less valuable knives to familiarise yourself with the technique before sharpening expensive blades.

How often should I sharpen my knives with this machine?

Frequency depends on usage patterns and knife maintenance habits. Professional kitchens might sharpen weekly, whilst domestic users typically need monthly sharpening. Regular use of a honing steel between machine sharpenings extends the intervals significantly. The key indicator is cutting performance - when honing no longer restores sharpness, it's time for machine sharpening.

Can it sharpen serrated or specialty blade shapes?

The CX 110 works best with straight-edged knives including chef's knives, paring knives and filleting knives. Serrated blades require different sharpening techniques and aren't suitable for this machine. Curved or unusual blade shapes may not maintain proper contact with the diamond discs, potentially resulting in uneven sharpening or blade damage.

What maintenance does the sharpener itself require?

Maintenance involves regular cleaning of metal filings from the diamond discs and housing. Use a soft brush to remove debris after each session and occasionally wipe the exterior with a damp cloth. The diamond discs don't require lubrication or adjustment. Store in a dry location to prevent moisture damage to the motor and electrical components.

How does the 15° angle compare to standard knife sharpening angles?

The 15° angle creates a more acute edge than the standard 20° used on most European knives, resulting in superior cutting performance. This sharper angle slices through ingredients with less pressure and creates cleaner cuts. However, the thinner edge requires more careful handling and regular maintenance. The trade-off between sharpness and durability makes 15° ideal for precision cutting tasks.