The angle grinder is not only one of the most frequently used power tools by professionals, but also a convenient cutting and grinding tool that we often come across in our daily lives. So how does one choose the right grinder?

1.Working Principle of Angle Grinders

Angle grinders use high-speed rotating discs, such as abrasive wheels, rubber wheels, wire wheels, etc. to grind, cut, deburr, polish metal workpieces. Angle grinders are suitable for cutting, grinding and brushing metals and stones. A guide plate must be used when cutting stone. For models equipped with electronic control devices, grinding and polishing operations can also be performed if suitable attachments are installed.

2. Applications of Angle Grinders

Angle grinders are basically used for cutting or grinding. There are many types of angle grinder discs for various tasks and materials, such as: cutting discs (diamond blades), steel wire brushes, grinding wheels, polishing wheels, woodcutting saw blades, marble cutting discs, aluminum alloy cutting discs.

Angle grinders are widely used in metal processing and construction industries, as well as emergency rescue operations. They are usually found in workshops, garages or auto repair shops. There are many types of angle grinders. The most important factors in choosing a suitable angle grinder are the size of the grinding disc and the power of the motor. Other factors to consider are whether the power source is electric or pneumatic, the speed and shaft size. The larger the grinding disc, the greater the electric power requirements.

When choosing an angle grinder, do not judge its quality solely based on the power rating. The power rating does not directly reflect the actual performance level of the angle grinder. In general, angle grinders can be divided into DIY, Professional, and Industrial grades.

Industrial grade angle grinders, as the highest quality level, are suitable for heavy duty work such as cutting and grinding stone. Industrial models may have similar specifications to DIY models, but if a DIY grinder is used for heavy duty work, its motor will likely overheat and fail quickly, and it does not have enough torque, which can cause the blade to get stuck during cutting and pose great safety hazards. Never choose a cheap angle grinder just to save money.

Issues like inflated power ratings and specs are common in the DIY market. The cheaper the angle grinder, the more likely the power will be exaggerated to attract consumers.

Evaluate the overall quality, design, manufacturing process and quality control of the angle grinder, and choose the right product for your needs, rather than relying solely on the power rating. Specs should also be compared carefully. Opt for reputable professional brands that offer reliable quality and easy maintenance.

3. Key Points for Selecting Angle Grinders

01 Choose angle grinders with different power ratings according to needs

For general grinding and polishing of stone or metal surfaces, angle grinders below 600W are recommended. For cutting welds or grinding rough metal surfaces with more force, opt for 700W angle grinders. For long periods of continuous heavy-duty metal cutting and stone carving, choose 800W or higher angle grinders with more professional capabilities. It should be noted that the input power is usually different with output power. The output power depends on the load condition of the angle grinder and the power the motor can withstand. If it exceeds the limit, it will cause the angle grinder to burn out.

02 Pay attention to the comfort of the angle grinder

Comfort is very important for workers who need to use angle grinders for long periods. A small, lightweight, ergonomic, low vibration angle grinder can reduce fatigue during work, is suitable for long-term use, and can also improve work efficiency. Vibration of angle grinders is unavoidable, but choosing a model with lower vibration frequency can greatly improve work efficiency and health.

For example, our KD69 angle grinder has a slim body design that allows for single-handed grip. It provides good handling, low vibration, high power, and ergonomic design for operator comfort.

03 Operation Specifications for Angle Grinders

Angle grinders are grinding tools used to cut and grind fiberglass. Lightweight angle grinders are suitable for deburring and grinding. Specifications vary by brand and model, so be sure to review the instruction manual before operation. Some small tips for safety:

04 Correct Usage Methods for Angle Grinders

Safety is crucial when operating angle grinders due to the spinning disc and flying debris. Protective eyewear should always be worn to prevent eye injuries. Heavy gloves guard against cuts, and face masks limit dust inhalation. Ear protection, like mufflers, reduces noise.

Choosing the right grinding disc type and grit for the workpiece material is also important to avoid damage and injuries. Discs designed for metal should not be used on stone or ceramics. Using two hands provides maximum control given the torque reaction of grinders. With proper wheel selection and handling, angle grinders can be used efficiently and safely for grinding, cutting, sanding and finishing tasks.