An angle grinder is a hand tool with a rotating abrasive disc used for grinding, cutting, or polishing hard materials. It can be electric or pneumatic and requires safety precautions. Different discs are needed for various tasks, and protective gear should be worn to avoid injury or fire.
An angle grinder is a mechanically operated hand tool equipped with a rotating abrasive disc. The disc is mounted at right angles to the motor and spins at a very high speed. This tool is typically used for grinding, cutting, or polishing metal, concrete, tile, and other hard materials. Angle grinder discs can be firm and abrasive for grinding and cutting or smooth and flexible for grinding and polishing. This powerful tool can be quite dangerous and precautions must be taken to ensure safe operation.
An angle grinder is usually a large, heavy tool that features two handles for greater maneuverability. Most angle grinders are powered by an electric or pneumatic motor. Cordless electric models are also produced. Electrically powered models are typically needed for heavy-duty work covering a large area. Pneumatic models are often smaller in size and designed for general light duty tasks.
All angle grinder models use the same basic operating principle regardless of size or type. A rapidly rotating disc is mounted on the side of the tool at right angles to the motor. The face of the disc can be used for grinding, sanding or polishing. Cutting maneuvers are usually performed with the edge of the disc. The cutting tasks performed by an angle grinder are actually performed by grinding a thin groove in the material until it has been separated into two parts.
Angle grinders are typically used to grind or cut pieces of metal, concrete, or tile. This tool is often used in auto body repair to remove rust and paint from metal parts and to polish chrome bumpers. An angle grinder is also an ideal tool for cutting concrete and asphalt surfaces during road and bridge construction. Builders often use this tool to cut brick or block and to remove excess mortar from masonry structures. This tool is also used by emergency personnel to free people trapped in vehicles.
Different types of angle grinder discs are needed for various tasks. Hard, highly abrasive discs are required for grinding or cutting steel and concrete. This type of disc should usually be kept moist when cutting concrete and masonry. Highly abrasive discs are sometimes diamond tipped to improve their cutting performance. Less abrasive discs are also available for grinding and polishing and typically require a flexible backing.
When using an angle grinder, certain safety measures must be taken to avoid injury or fire. Injuries to the head, face and feet are common when operating this device. A hard hat and visor is usually required to avoid being hit by flying debris. Protective footwear must be worn to avoid injury from falling pieces of concrete and steel. Grinding and cutting steel with this tool typically produces numerous sparks that can ignite nearby flammable materials.
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