A surface grinder is used to create a very smooth finish on almost flat surfaces. It’s a popular abrasive cutting method in which a rotating disc-like tool covered with abrasive material cuts pieces of nonmetallic or metallic material at a high-speed, producing a fine face of it smooth or even flat. The rough texture of the abrasive material helps to spread the sharp edge of the tool across the surface in many different directions so that the entire surface is touched in a uniform fashion.
The most common type of surface grinder is the rotary grinding wheel. It consists of a small grinding wheel with two rows of teeth, and a large flat plate, usually made from steel, attached to the front. On this large plate, a number of cylinders with teeth attached are fitted. These cylinders, each of which is approximately half the size of the flat plate, spin at a fixed speed on the ground horizontal axis. As a result of this continuous rotation, the rows of teeth penetrate the surface of the workpiece and, in the case of flat work, gradually shave off small amounts of material, and in the case of rounded work, create a beveled edge that is finely ground.
In the case of metal fabrication, such as in making pipes and screws, this type of machining is normally used in conjunction with another type of surface tool called a drilling press. In a drilling press, a cylindrical housing with a series of holes is pushed into a drilled hole, and the work surface is quickly accessed through the holes created by the holes. In this way, surface grinding and cutting tool positions are often alternated with each other. However, the main advantage of using a surface grinder in drilling is that it allows the user to move directly from one position to another without having to slow down the grinding or cutting process.
A further variation on the surface grinder is the rotary grinder. In this type, the spindle, which is rotated, either electronically or manually, to move the work piece in a forward or reverse direction. This type of grinding tool usually incorporates a gear system that is controlled by the operator for the amount of grinding action. The most common types of rotary grinders are self-contained, which means that they have their own power supply and drive system. They may also include a clutch system for additional control.
Another type of surface grinder is the electromagnetic chuck. This is basically a piece of metal that consists of two pieces; the first is circular, shaped like a corkscrew, and the other is metallic and it has a magnetic field inside of it. The electromagnetic chuck works by pushing the chuck into a drilled hole, where it comes in contact with the surface that needs grinding. Because it is metal, electromagnetic chucks tend to last longer than other types of surface grinder – although it is more difficult to maintain and repair.
These are the basic types of surface grinder that can be used for many different types of workpieces. Grinding wheels tend to be more expensive, and therefore these tools are often used for heavier work that requires precision and speed. If you want to purchase a wheel, it is important to know exactly what you are buying. It should be able to handle the types of surfaces and materials that you are planning to use it on.