Брусок алмазный двухсторонний 50/40-20/14 100% (OSB)

The Venev Diamond Factory's premium series of abrasives on a flat aluminum plate. The abrasive layer on this plate is not sintered, but glued to the plate body.  

The 50/40 side is made on the organic binder B2-01. The organic binder consists of phenol-formaldehyde resins and various compositions based on them. The organic binder consists of phenolic-formaldehyde resins and various compositions based on these resins, which are bakelized during hot pressing into a hard and sufficiently strong substance that holds the cutting grains in the working layer of the tool. Such a bond will be sufficiently strong and viscous, but not rigid enough. Abrasive powders, for example boron carbide, are added to make it tough.

The 20/14 side is made on a new upgraded OSB bond. The difference between the OSB binder and others is that it does not use boron carbide. In addition, the abrasive layer on it is not sintered, but glued to the body of the metal plate. The lack of extra inclusions of other abrasives makes it possible to do softer and finer work. OSB binder is ideal for hard steels on small angles.

Designed for main sharpening.

Work recommendations: You can work with this binder with both soapy water and oil.  The manufacturer himself recommends working with water or soapy water, but working with oil gives excellent results in terms of cleanliness of the process itself, not leaving such a large amount of water suspension.