There are angle grinder parts for every component of any hand held grinder. This is for pneumatic, electric, or gasoline powered tools. Each of these has moving and non-moving parts that may need replacing. Just like an old hammer whose handle has worn out or cracked because of time and stress that had been applied to it. The parts inside your angle grinder will need replacing if the same thing happen to them.
The different power sources of your grinder will determine which parts will wear out and need replacing. For electric powered grinders, both with cords and batter power, the bushings are the most worn moving parts. The wire and plugs also need inspections and immediate attention if any fraying is found.
Right Angle Drill
For those grinders that are powered by internal combustion engines, the number of moving parts is considerable. Just like any engine, there are bearings, seals, compression rings, and valves, along with the spark plug that must be constantly maintained. The proper scheduling of the oil changes is the most crucial of all with this power grinder, but all are important for it to function properly.
The pneumatic grinder is vastly different than the others with its moving parts. The most common item that wears with them is the o-rings. Even with proper oiling, these seals will wear out in time and need replacing.
The one part that all of these angle grinders have in common are the bearings that change the direction of the rotating shaft. This must always be greased and lubricated to help prevent wear and tear from making your tool non-functioning.
These are most of the most common angle grinder parts that will need replacing if you use your hand angle grinder.