The LSS 53 Vertical Grinder is extremely solid and powerful enough for even the toughest roughing jobs thus making it an excellent choice especially when frequent access to the work area is of lesser importance. The solid, rigid design with an air-powered nodular cast iron cylinder and vertically positioned air hammer gives it durability and impressively long working life. The adjustable angle of about 0. Zurita type diamond blades ensures that grinding remains a smooth, effortless affair yet with adequate control over the grinding angle the outcome is consistent and superior. In addition to this it comes with ergonomic roller wheels which make it easy to move from one work bench to another.
There are two types of grinding wheels with each having its own advantages and disadvantages. These are generally classified as radial-pistoned and torsion-tang shaped grinding wheels which are also known as tandem grinders. The radial-pistoned vertical grinder is the most commonly used and widely available type in the market due to its simple mechanism which only requires a pinion. This type comes with teeth which have a slightly larger diameter than those of the tangential grinding wheels thus facilitating the use of more grinding surfaces thereby improving the efficiency of the tool.
The torsion-tang shaped vertical grinder has a spindle that is perpendicular to the axes of rotation. It uses a single diamond blade at the center and the workpiece is moved up and down by means of an adjustable angle on the vertically mounted workwheel. It is capable of performing face grinding and is preferred mainly for tougher and bulkier workpieces which need to be ground at high speeds. The disadvantage of using this type is that it tends to slip when using the work in a vertical position.
The next series, the counter-trending grinder, is another vertical grinder type which has two sets of teeth instead of the one diamond blade. These teeth have larger radii and the result is a counter rotating action which increases the speed of the grinding operation. The largest set of teeth has a maximum load capacity of 7.2 times that of the set of smaller teeth. They can also handle face grinding coarse materials such as steel and titanium. Some of the 56v series vertical grinders have a rotating centre which is particularly useful for multi-spindle grinding applications.
The last type of grinder to be mentioned is the zero-feed vertical grinder which operates by having the workpiece positioned between two rollers with teeth attached to each of the rollers. The feed system allows the material to be drawn into the grinding area but the feed does not allow any suction or back flow of material. The result is greater accuracy and lesser distortion of the workpiece. The negative feed mechanism also allows greater rotation of the workpiece, which allows the grinding operation to continue at a higher rate than the conventional vertical grinder. The biggest disadvantage is the need for a continuous hydraulic supply to the mechanism.
The two types of vertical grinder discussed above are used mainly in production settings to increase production efficiency by reducing defects and minimizing roundness error. They offer similar high precision performance when compared to handheld grinders and are often used in counter-flow and zero-feed systems. There are advantages and disadvantages to each type of vertical grinder based upon the requirements of the application and the type of material to be printed. For larger and more complex projects, the continuous hydraulic supply required by the counter-flow vertical grinder will be necessary.