General about orbital sander

Orbital sander are electric or pneumatic tools that are operated by hand and grind surfaces with abrasive paper attached to a flywheel. They are intentionally used for roughing and regrinding various materials. For example, varnishes, hardwoods or softwoods with a sanderprocessed. Using a Velcro fastener or special clamps, the sandpaper is attached to the swing plate of the orbital sander. In addition, an orbital sander has a system for extracting dust and other grinding debris. This ensures health and environmental compatibility.
The choice of used grinding machineshould depend on your own working method, the materials used and the workpieces produced. As a rule, an orbital sander is sufficient for most jobs Random Orbit Sander out. Above all, if the work steps in the production of a workpiece are planned exactly, one is well advised with one of these devices.

Differentiation to the classical orbital sander

In a classical orbital sander, the mostly rectangular flywheel plate is set in a circular motion together with the sandpaper spanned thereon. The flywheel is mounted eccentrically and is driven by an electric motor. The sanding plate in the form of a rectangle enables the machining of workpiece corners and edges. Similarly, there are orbital sanders with triangular grinding plate. The sharper angle also reaches hard to reach corners. As a rule, classic orbital sanders have a small stroke of around two to three millimeters. The path that covers the grinding plate in one movement is referred to here as a stroke. Classic orbital sanders are particularly suitable for fine and precise sanding. The only slight movement of the square grinding plate results in a fine sanding pattern and only very small and hardly visible sanding marks in the material to be processed. Coarser grinding work, in which a lot of material is removed, should not be carried out with classic orbital sanders.

The device for the rough – The Random Orbit Sander

The special about one Random Orbit Sander is that the oscillatory motion is complemented by a rotational movement. As a result, the process of grinding is extremely accelerated because the material removal is much greater than in a vibration, transmission or belt sander, Of course, most models have a coarser sanding pattern. This will require additional sanding by hand or with an orbital sander to finish the surface finish. The most important characteristic of an orbital sander is the diameter of the resonant circuit. The larger the diameter, the further the movement of the grinding disc. And the greater this movement, the faster the material will be removed. With larger material removal also larger sanding marks come on the surface of the processed wood. On Random Orbit Sander with slow oscillating motion and smaller resonant circuit carries slower material and leaves minor grinding marks.
Eccentric sander exist in many different models with different size pads on the market. If the grinder has a smaller sanding pad, the device requires a smaller motor. This reduces the weight of the machine. They are easier to handle and come closer to corners inside the workpiece. For large areas, however, are suitable Random Orbit Sander with the largest possible grinding plates. For example, large sanding discs have the advantage that they are less likely to follow any unevenness on the surface of the workpiece. Especially large plates are even suitable for grinding uneven surfaces.
Another significant factor is the hardness of the grinding disc. You should definitely have several, different hard sanding plates on hand. For example, a softer sanding pad allows sanding delicate surfaces with not too small curves. A very hard sanding pad is used to sand off bumps. Plane wooden surfaces should be treated with a medium hard sanding pad

The reworking of the surface

When using an eccentric grinder with a hard sanding plate, a reworking of the surface by hand is recommended. This sweaty work can be simplified with simple tools and the result can be improved with simple tricks. A simple sanding block, on which the sandpaper is placed, allows a better way to level unevenness and better power transmission. For sanding profiles is a palm made of foam. By means of Velcro a grinding wheel on a Toolmade of foam with hand strap attached.