Chances are if you’ve seen any construction work being done, you’ve seen that the finishing touch is performed by a power tool known as the grinder. Grinders are popular heavy-duty tools that are used to finish work pieces and surfaces. They come in many different variations, all of them suitable for different projects. So if you happen to be on the lookout for a brand new grinder, there are a couple of things to consider before making the purchase.
From angle grinders to belt and die grinders, you can find these tools online, in commercial tool warehouses and home improvement stores. You can use these tools to finish work pieces that are made of brass, concrete, steel, cast iron, plastics and so on. Grinders can be either hand-held or stationary, depending on their size and use. They’re typically powered by an electric motor, petrol engine or compressed air. Here are 3 of the most popular types of grinders.
Most grinders aren’t really considered great at fine finishing. They’re typically tools that do rough finishing. However, when detailed work needs to be done with a grinder, you can always rely on die grinders. The reason being, is that these grinders are much easier to handle and lighter than others, which is mainly due to their smaller size. They’re most commonly used by welders, boilermakers, sheet metal workers, iron workers and auto body workers. But don’t let their size fool you – these grinders are considered heavy-duty power tools and operate at extremely high speeds, often exceeding 30.000 RPM.
Angle grinders are one of the most popular types nowadays. They’re used for cutting as well as removing excess material from a work piece. They aren’t capable of doing fine finishing, but they can cut through a lot of tough materials. They’re used by stone finishers, welders and masons, making them the most commonly used grinder in metalworking and construction. The RPM and APM of the motor matters, as they need the power and speed to cut through tough materials efficiently. 15 APM motors are recommended, which translates roughly to 8.000 RPM.
Bench grinders are the most popular stationary grinder and they’re usually bolted to a bench or a table. They feature abrasive discs on both sides with a motor in the centre, and they’re used for heavy-duty rust removal, shaping, grinding and cleaning of wood, pipes, metal and stone. The motor on the bench grinder typically has 3.500 RPM and the wheels range between 5 and 10 inches in diameter. By having two wheels, you can use two different abrasive discs at the same time, allowing one of the discs to perform rough grinding, while the other disc to perform more detailed and finer work.