What is a grinding wheel? Grinding wheels consist of layers of abrasive grain and fiberglass that are bonded into the shape of the wheel by another substance. Abrasive grains act as abrasive tools, removing material from the workpiece to shape and refine it. Grinding wheels are used in many grinding and machining operations.
There are many types of grinding wheels to choose from, so when a facility is selecting a grinding wheel, it is important to consider the specifications of the contrasting styles and their ability to handle different environmental and operational challenges.
Wheel type
Grinding wheels—along with other, more portable grinding products such as cones and plugs—come in a variety of styles. Selecting the correct type of wheel for a given application allows users to complete demanding metal fabrication jobs quickly and accurately. Grinding wheels are mainly divided into three types, and different numbers are used to distinguish grinding wheels with specific properties and uses – type 1 grinding wheel, type 27 grinding wheel and type 28 grinding wheel.
Type 1
Type 1 cord reels have a straight profile and a relatively small diameter, about 2 to 4 inches. Its size makes it ideal for use on high-speed die grinders to grind away excess metal. Our Type 1 grinding wheels feature aluminum oxide grit for long life grinding and consistent stock removal rates.
Type 27
Type 27 is by far the most common grinding wheel. Type 27 grinding wheels differ from other wheels in that they have a flat profile and a concave center. The recessed center allows clearance when the operator must work at restricted angles. A range of grinding angles can be achieved with recessed center wheels, typically 0 to 45 degrees. However, the optimum angle range for a size 27 wheel is 25 to 30 degrees. The steeper the grinding angle, the more aggressive the cut. Working at small angles with these wheels requires consideration of the potential consequences. Grinding at a shallower angle increases the life of the wheel, but generally also reduces the stock removal rate. On harder materials, shallower grind angles may also add unwanted vibration and chatter.
Type 28
Type 28 wheels, also known as disc wheels, have a similar concave center and are optimized for low grinding angles. They differ from Type 27 wheels in that their concave or dished design allows for better contact with the workpiece—especially in tighter areas like corners, fillets, and overhangs—and in smaller jobs. Increase the aggressiveness of the angle. They can work at angles between 0 and 30 degrees, but generally work best at grinding angles of 0 to 15 degrees.
Fianl Thoughts
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