Angle grinder

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An angle grinder is a handheld tool powered by an electric motor, petrol engine or compressed air. The motor drives a geared head at a right-angle on which is mounted an abrasive disc that can be renewed when worn. Angle grinders typically have an adjustable guard and a side-handle for two-handed operation. There are myriad different disks that are used for various materials and tasks, such as cut-off disks (Diamond Blade), abrasive grinding disks, sanding disks, wire-brush wheels and [polishing] pads. The angle grinder has large bearings to counter side forces generated during cutting, unlike a power drill, where the force is axial.

Angle grinders are widely used in civil engineering, in particular metalworking and construction, as well as in emergency rescues. They are commonly found in workshops, garages and auto body repair shops. However, they can be very dangerous due to the high rpm involved and the sparks and bits of metal that fly off as they cut. The even more dangerous aspect of Angle Grinders is that a bad cutting disk can explode when used. The other danger is that if the edge of the grinding wheel catches in a corner of the material the torque from the spinning grinding wheel will attempt to propel the tool up and back at the operator. For these reasons angle grinders are considered to be one of the most dangerous hand power tools.

Safety equipment should be worn while using this, or any power tool. A face shield should always be worn along with gloves, respirators, ear protection, long sleeves and hard hats are highly suggested. Especially when grinding toxic materials like lead based paint.

The angle grinder can be contrasted with other varieties of grinders; see grinding machine, bench grinder and other diamond tools.