All sharpeners are equipped with ultra hard (65 hrc) and razor sharp high carbon steel blades. These blades are harder than ball bearings or any high quality knife. This is needed because pencil leads are made of a mixture of graphite and various types of clay, which are extremely hard.
Each blade is razor-sharp. A felt sharpening wheel (similar to leather) is used as the last step in the automatic sharpening process. Note: stainless steel cannot be used because it cannot be sharpened that much.
Dynamic Torsion Action
We are the only manufacturer in the world to equip our sharpeners with a curved blade. Due to the curved blade form, the cutting edges are under constant tension and cannot “curl-up” as a result of the ensuing pressure during sharpening. This in turn prevents rebounding or cracking of the pencil tip.
Furthermore, the pressure against the screaw-head prevents it from lifting or loosening.
Sharpeners for big pencils
Sharpener for ∅12mm pencils
Sharpener for ∅16mm pencils
Sharpener for ∅17mm pencils