A double-sided grinder, also known as a slicing machine, is a general purpose rotating device consisting of an oscillating cutting face that rotates clockwise and an additional spinning face that rotates anticlockwise in the same direction. Typically the first spinning face is called a fixed face. The other spinning face is called a variable face, which contains an additional auger for grinding or milling components, and sometimes a router attachment. Normally each face has a pair of cutting edges; however some models include a center hole and cutting blade.
These types of machines are ideal for producing prototypes and intricate patterns as well as for grinding different materials, such as aluminum, steel, and copper. The two-sided rotating machine is the most common type of machine used today for rough or abrasive finishing on metal surfaces. The two-sided rotating machine is used primarily for rough finishing or grinding and is suitable for cutting both inlays, stamps, die cuts, fabricate, and engrave various surfaces. In addition, these types of grinders can be utilized for polishing and buffing aluminum, copper, brass, stainless steel, fiberglass, aluminum oxide, aluminum alloyed, titanium, and copper.
One advantage to the use of a two-sided grinder when compared to a single-sided grinder is the ability to move the workpiece along the surface of the grinding stone. This feature allows a user to alternate grinding sides for the purpose of obtaining a variety of different working positions. To gain maximum performance from a two-sided grinder, a user should make certain that the distance between the grinding blade and the workpiece is appropriate. The two-sided grinder will perform best when the distance between the blade and the workpiece is at or slightly above the elevation of the workpiece itself.
A drawback to the two-sided grinder when compared to a single-sided grinding device is that it generally generates a higher degree of noise. The grinding sound produced by these types of grinders is normally not too loud nor loud enough to interfere with sleeping. However, the grinding noise generated by the two-sided grinder can be reduced by increasing the speed of the rotary blade. Some grinders, such as those manufactured by Festool, include an option for variable setting speed adjustments. Other manufacturers offer universal options that allow adjustments of speed that are controlled by a push button.
Single-sided grinders are similar to the double-sided grinder in that the only difference is the position of the grinding blade. Single-sided grinders are typically more suited for softer metals. They are also suitable for use in applications where the primary purpose of the grinding blade is to create a fine, finer finish than is possible with the double-sided grinder. The single-sided grinder does not produce a very large amount of dust and produces very little noise. However, it is more appropriate for use in sanding and polishing rather than in grinding.
Both single and double-sided grinder have benefits that make them appropriate for a wide range of operations. These types of grinders are most often used for sanding and polishing hard metals and other surfaces. In addition to their ability to grind to a fine finish, they are ideal for grinding wheels, bearings, and other components. They are available in different sizes and configurations to accommodate different sized components. Some grinders are also designed to accommodate different material types including aluminum, copper, brass, lead, and more. By allowing different types of materials to be ground at the same time, the two-sided grinders eliminate interference from uneven heat dissimilar materials.