Angle grinders are multi-purpose hand held power tools that can be used for cutting, grinding, surface preparation and polishing of metals.
The choice of angle grinder is important as it will influence the quality of the job undertaken.
Here are some of the factors that should be considered when choosing an angle grinder for metal fabrication:
- Corded or cordless:
Power tools such as angle grinders can be either corded or cordless. For heavy workload and use over long durations, a corded angle grinder would be a better choice. Since it is connected to a power source, a continuous supply is available for use without any
interruptions.
On the other hand, for field work or work over a shorter duration of time, a cordless angle grinder will provide more portability and flexibility. They can also be handy for use in tight spaces.
- Power Consideration:
Power is a key consideration in the choice of an angle grinder. Higher wattage translates to higher power for heavy-duty cutting and grinding work. An angle grinder with greater power will also give faster cuts and smoother finish.
When working with light sheet metal, lower power works well. Generally, up to 900W works effectively for use with sheet metal.
- Type of disc:
The angle grinder needs to be compatible with the types of discs that are required for the job. Typically, there are different types of discs for cutting, grinding and polishing. Using the right disc for the right task helps in carrying out the task smoothly and prevents any accidents.
The size of the disc should match the rated capacity of the angle grinder. Angle grinder discs range from 3 inches (75 mm) to 9 inches (230 mm) in diameter. A disc size of 4 -5 inches is commonly used in DIY projects whereas discs that are 9 inches and above are used for heavy industrial work.
- Variable speed:
One can usually adjust the speed of the angle grinder. This supports different tasks such as moving from heavy grinding of metal to polishing the surface lightly. Being able to vary speeds of the angle grinder helps to prevent any discolouration and warping of metal, gives a superior finish and offers versatility as the same power tool can be used for tasks that need either light and heavy speeds.
- Safety considerations:
Choosing a power tool such as an angle grinder that is designed for safety and comfort is of utmost importance. It is necessary to check that the angle grinder has a
mechanism to protect against overloading. The presence of features such as kickback brakes and paddle switch help in making the operation safer. If the grinder is to be
used for longer durations then an anti-vibration handle is a must for protection of the user.
In conclusion, the choice of angle grinders depends on several factors. Power, torque, speed settings, safety features, ergonomics, and application are all key considerations while choosing the right angle grinder.
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