A double-sided grinder, also known as a dual-sided grinding machine, is a powerful grinding device made up of two rotating faces which rotate in opposite directions each having a different degree of engagement. The lower grinding face is normally referred to as the stationary face and the upper rotating face is termed as an adjustable face. They are usually found in metal working shops. The two faces have different levels of ground quartz and are used for different purposes.
The two-sided rotating face of the double-sided grinder has an extractor in the center which can move up or down to pick up small pieces of material along the grinding path. In order to grind heavier materials, a tail mill is fitted to the grinding mechanism. The grinder has a solid steel work surface with tiny holes bored into it at various places. These tiny holes allow only small particles to enter the grinding path as the material passed through these holes is prevented from entering other holes in the workpiece. This ensures that the material being worked will be totally ground without the interference of small particles.
A variety of grinding devices are available in the market according to the application they are intended for. The two-sided grinder has the same benefits as the fixed grinder with the added advantage of the adjustable face being removable. Many designs of double-sided grinders are available in the market. They can be used both in indoor and outdoor applications. In this way the user can choose the type of grinding method depending on the type of work being done.
The two-sided type of grinders can be either portable or fixed. In a portable unit, the user can take it along when traveling. In case of fixed units, they are permanently installed. The fixed grinders usually have larger cutting spaces than the portable ones. They also produce finer burrs but cost more than the portable ones.
Double-sided grinders are available in different shapes and sizes and offer different advantages. Some of them are stationary and some are hand operated. The stationary type is more suitable for use in making large grinders while the hand operated ones are good for smaller jobs. The choice depends on the power source of the grinder used.
In most of the two-sided grinders the working surface is made from either steel or chrome plate. The smaller grinders are made of aluminum and need a special work area with sufficient space. These grinders are not as powerful as their two-sided counterparts and are used mainly for standard home usage. For commercial purposes the largest grinders are used. These grinders produce coarse grind but also give excellent results.