Belt sander

The belt sander is a power tool for planar grinding of workpieces.

Construction

Belt sander use an endless grinding belt which is guided around two rollers ( driving roller and guide roller ). The sanding belts have the required machine-dependent different dimensions (width and extent specified respectively in millimeters, for example, 40 x 303, 75 x 457, 100 x 610) on. In general, it is obliquely bonded together sandpaper strips with a textile base. In the area of ​​1-2 cm broad bonding is not abrasive. The specification of the grain size corresponds to that of sandpaper, however, there are not for all dimensions of all grains. The commercial area of ​​the grain size is between 40 and 240

Use

Are used belt sander mainly for grinding of large areas, such as for grinding of wood, metal or even plastic. Belt sanders are particularly suitable for the machining of non-ferrous metals such as aluminum, tend to clump the chips on the abrasive paper, because the relatively small diameter of the grinding belt guiding rollers promotes peeling of the chips from the sanding paper. Belt sander lead particularly when working with wood to a rapid stock removal and a measured on the grain size, relatively coarse grind, so that they are only for the preparatory work or for material removal, including paint wear, used or should be used. According to the procedure in grinding with sand paper, must be started in the processing with the largest grain, and continued with finer grains. As with all grinding operations should in a material with a preferential direction only and will not be used in this transverse thereto.

New belt sander must be fitted with a dust extraction system, which protects the user from the resulting swarf. Modern devices have an electronic speed control with the tape speed is adjustable. Especially for heat-sensitive materials such as plastics but also some woods, a speed control is important because the default running speed of a belt sander also tends in sandpaper with coarse grit to a strong heat that can melt the plastic and discolor wood.

Variants

While out at the handsets of the belt sander to the fixed workpiece, the workpiece must be kept above the belt sander in stationary models. Stationary models are often combined with a side grinding wheel.