Sandpaper

Sandpaper ( general abrasives on location ), sometimes referred to as sand or emery paper, is a tool for surface machining by grinding. Sandpaper is used to smooth rough surfaces of wood or to break edges. It is also suitable for larger stock removal. Furthermore, abrasive papers are not only used for wood, but also for paint, metal and natural stone.

Abrasive cloth is used like sandpaper, but a fabric (formerly linen) is here used as a support material. Abrasive cloth is stronger by a multiple mechanical loads, thus a higher lifetime. Thus grinding machine is possible, for example, with a belt sander. When using circular abrasive papers Grinders are used. The shape of the circular sanding paper has proven especially when sanding paint, metal and natural stone.

Through the grinding surfaces get the final shape and fineness. As with saws, rasps and files, material is removed, the grinding.

Grain size

Sandpaper or emery cloth are available in different grain sizes. The number of grain that is usually specified on the back, based on the unit mesh, the number of meshes of a net per inch ( 25.4 mm). The larger the number, the finer the grain size. Rollover default applies to the particle size: particle size in mm = 25.4 / grain.

The particle size and activity are associated depending on the particular application (e.g., material, machine, output surface, aimed at the surface) and the habits of the user. There are also strong regional differences in the processing steps.

The grain size is defined in the standards of FEPA ( Federation of European Producers of Abrasives ), see examples of mesh ( unit ) and DIN ISO 6344th

Abrasive

As the abrasive formerly Flint ( Flint ), garnet and emery were used.

Today, synthetic abrasives in their place, such as alumina, silicon carbide, chromium ( III) oxide, zirconium step (IV ) oxide and other products in the technical ceramics.

Sanding belt

The sanding belt is a ring-shaped bonded abrasive paper of different length, width and grit for clamping in a belt sander. For each device, there are the appropriate dimensions. Note, the direction, which is printed on the inside. Substituting the sanding belt incorrectly, it runs backwards and the splice fails after a short time.

History

Isaac Fisher Jr. of Springfield (Vermont ) received on June 14, 1834 on the production process of sanding paper it represents the U.S. patent numbers 8,246 and 8,247.

In Germany 1863 Carl Friedrich Schröder began in Munden with the industrial production of coated abrasives pad.