The term “surface grinder” refers to an abrasive concrete cutter that is primarily used to grind stones, metal and nonmetallic material. It is also used to create a smooth polished finish on many flat surfaces. It’s a popular versatile abrasive cutting method used in a variety of machining operations, where a rotating abrasive drum containing crushed rough particles is utilized to cut away chips of metal or non-metals from a workpiece. The main advantages of this type of grinder over other types of cutting tools are its speedy speed of operation, ability to work in hard to reach places, and excellent capacity for workpiece fabrication and repair.
A spinning wheel consists of a number of cylinders and a large abrasive wheel attached to the outside of the cylinders. When you talk about the “rotary action”, this means that the cylinders are able to rotate either clockwise or counter-clockwise. The size and shape of the wheels will depend upon the types of materials to be printed. For example, if you want to grind aluminum alloy surfaces, a flat wheel with approximately 25 inches of spacing between the cylinders would be necessary.
The two types of grinding machines that use the surface grinder concept are electrical and hydraulic-electric. Electrical surface grinding machines are quite common, powered by either 12-volt or 24-volt power source. Hydraulic-electric machines, on the other hand, are not as common, probably because the hydraulic fluid is difficult to store, maintain and transport. They are best suited for grinding larger pieces or areas with numerous obstacles. In addition, these types of machines can’t work well without the use of electromagnetic chuck, which consists of a coil spring, compressed air, and a ground contact.
To compare both types of surface grinding, it is important to understand first what the differences are. The main difference is in the area being cut. Electrical surface grinder uses an electromagnetic energy, which makes it different from hydraulic-electric types. Electric machines can also grind finer and faster than the hydraulic ones.
As for the features of each type, a surface grinder with a chuck and a revolving work bed is considered more efficient than a single-action one. With a single-action grinder, there is only one moving piece and its position is fixed. Work piece movement can only be done in a vertical direction, and the speed of the work piece depends mostly on how fast the blade will move. Since the blade needs lubrication and need to be free from debris and rust, this type of machine is limited when it comes to cutting rough materials and tougher ones, but this is why it is often used in applications where high speed is required.
The other feature needed to define a machine is its power source. There are two types of power sources: battery and electric motor. Usually the electric motorized surface grinder is more expensive and is used by more industries. However, the battery-powered type is more portable and easier to store and use.