Disc cutter
A disc cutter is a specialised, often hand-held, power tool used for cutting hard materials, ceramic tile, metal, concrete, and stone for example. This tool is very similar to an angle grinder, chop saw, or even a die grinder, with main difference being cutting disc itself, (circular diamond blade, or resin-bonded abraisive cutting wheel for disc cutter vs. abrasive grinding wheel for angle grinder). This tool is highly efficient at cutting very hard materials especially when compared to hand tools.
Discs
Often cutting discs or (cut-off wheels), are made from a solid abrasive disc. These discs are often used for cutting metal; they are composed of an abrasive mix of grit and adhesive that is formed into a rigid and thin disc with fiber webbing running through it for strength. Some discs used for cutting ceramic tile or stone are made from a solid disc with an edge coated with a diamond grit. The most common size for these cutting wheels is 4-1/2 inches in diameter, however they cn range from 2 to 16 inches in diameter with a thickness range from .045 in to .125 in. Type 1 discs are flat, and type 27 discs have a raised hub. These wheels are strong, but not immune to breaking, if a cutting wheel breaks while in use, fragments could injure the operator or a near by co-workers. To avoid breaking cutting discs, never exceed the maximum speed (RPM) specified on the disc, and do not overload the disc by cutting with excess force or jamming the wheel into your workpiece.
Applications
Many manual cutting tasks require a hand-held grinder using a cutting wheel. Metal fabrication is one of the most common uses for cutting wheels. Used to cut sheet metal, sizing metal stock for welding, cut a weld to re-weld it, and cutting and notching steel pipe are just few examples. Die grinders and Chop saws are also common tools used with cutting discs.
Smaller projects and smaller or more precise cuts may require a die grinder equipped with a cutting wheel, these cutting discs are extremely thin and often less than 2 inches in diameter. Because they are so thin, they are commonly made with metal and have a diamond coated edge for the abrasive. This type of disc cutter is good for sheet metal and light weight or thin materials, thicker or heavier materials will need a larger disc cutter.
For long straight cuts on sheet metal or light cut-off work, a standard Circular Saw is used with a 7 1/4 inch cutting wheel. These cutting discs are made just like the smaller wheels for an angle grinder, with resin bonded abrasive material, or metal with a diamond coated edge.
A cutoff saw is used for cutting larger materials, like heavy metal stock, metal studs, or cutting large metal pipe. The cutting discs for this tool are usually 10 or 12 inches in diameter, with a composition like that of the smaller wheels mentioned above. When cutting heavy materials the cutting discs mat require lubrication or coolant to prevent overheating. The cutoff saw is for making clean straight 90 degree cuts through the material.
Citations
- "Metal Cutting Disc". homeguides.sfgate.com. Retrieved 2019-09-18.
- "Grinding and cutting safely". www.thefabricator.com. Retrieved 2019-09-18.
- "Cutting metal with cutting wheels". www.thefabricator.com. Retrieved 2019-09-18.