A corded angle grinder is powered by electricity through a power cord connected to an outlet. It offers consistent power output, making it suitable for heavy-duty tasks and prolonged use without the need for recharging. Corded models are generally more powerful, providing higher torque and speed, which is ideal for cutting, grinding, and polishing hard materials. However, their mobility is limited by the length of the power cord, and they require access to an electrical outlet, which can be inconvenient in remote or outdoor locations. In contrast, a cordless angle grinder is powered by a rechargeable battery, offering greater mobility and convenience, especially in areas without easy access to electricity. Cordless models are more portable and allow for use in tight or hard-to-reach spaces without the restriction of a cord. However, they typically have less power and shorter runtime compared to corded models, depending on the battery capacity. The need to recharge or swap batteries can interrupt work, and they may not be as effective for heavy-duty tasks. In summary, the choice between corded and cordless angle grinders depends on the specific needs of the user. Corded grinders are better for continuous, high-power tasks, while cordless grinders offer flexibility and ease of use in various locations.

To choose the right size angle grinder for a job, consider the following factors: 1. **Material Type and Thickness**: For cutting or grinding thick, hard materials like metal or stone, a larger grinder (7-9 inches) is more effective. For thinner materials or lighter tasks, a smaller grinder (4.5-6 inches) suffices. 2. **Job Scale and Duration**: Larger grinders are suitable for extensive, heavy-duty tasks due to their power and larger disc size, which covers more area quickly. Smaller grinders are ideal for precision work or tasks requiring maneuverability. 3. **Power and Speed Requirements**: Larger grinders typically offer more power (measured in amps or watts) and higher RPMs, making them suitable for demanding jobs. Smaller grinders are less powerful but more manageable for detailed work. 4. **Workspace Constraints**: In tight or confined spaces, a smaller grinder is easier to handle and maneuver. Larger grinders require more space and are less suited for cramped areas. 5. **User Experience and Comfort**: Consider the user's physical strength and experience. Larger grinders are heavier and may cause fatigue over long periods, while smaller grinders are lighter and easier to control. 6. **Disc Availability and Versatility**: Ensure the availability of the required disc sizes for your grinder. Smaller grinders offer a wide range of disc types for various applications, while larger grinders may have limited options. 7. **Budget Considerations**: Larger grinders are generally more expensive. Evaluate the cost against the frequency and type of use to ensure a cost-effective choice. By assessing these factors, you can select an angle grinder size that aligns with the specific requirements of your job, ensuring efficiency, safety, and optimal performance.

1. **Personal Protective Equipment (PPE):** Wear safety goggles or a face shield to protect against flying debris. Use ear protection to guard against noise. Wear gloves to protect your hands and a dust mask if working with materials that produce dust. 2. **Inspect the Grinder:** Check the angle grinder for any damage or defects before use. Ensure the guard is in place and secure. Verify that the disc is appropriate for the material and is not cracked or damaged. 3. **Secure the Workpiece:** Ensure the material being worked on is securely clamped or held in place to prevent movement during operation. 4. **Correct Disc Installation:** Make sure the disc is properly mounted and tightened. Use the correct disc for the task and material. 5. **Safe Environment:** Work in a well-ventilated area to avoid inhaling dust and fumes. Keep the workspace clean and free of clutter to prevent tripping hazards. 6. **Proper Handling:** Hold the grinder with both hands for better control. Maintain a firm grip and be aware of the kickback. 7. **Avoid Loose Clothing:** Wear fitted clothing and secure long hair to prevent entanglement with the moving parts. 8. **Power Source Safety:** Ensure the power cord is in good condition and positioned away from the grinding area to prevent damage. Use a Residual Current Device (RCD) for added electrical safety. 9. **Start and Stop Procedures:** Allow the grinder to reach full speed before applying it to the workpiece. Turn off the grinder and wait for the disc to stop spinning before setting it down. 10. **Stay Alert:** Be aware of your surroundings and maintain focus on the task to prevent accidents. 11. **Emergency Preparedness:** Have a first aid kit and fire extinguisher nearby in case of accidents or emergencies.

1. **Unplug the Grinder**: Ensure the angle grinder is unplugged from the power source to prevent accidental start-up. 2. **Secure the Grinder**: Place the grinder on a stable surface or use a vise to hold it steady. 3. **Locate the Spindle Lock**: Find the spindle lock button, usually located on the top of the grinder near the wheel. Press and hold it to lock the spindle in place. 4. **Remove the Old Wheel**: - Use a wrench or the provided spanner tool to turn the flange nut counterclockwise while holding the spindle lock. - If the wheel is stuck, gently tap the wrench with a mallet to loosen it. - Once the nut is loose, remove it along with the old wheel. 5. **Inspect the Flanges**: Check the inner and outer flanges for wear or damage. Replace if necessary. 6. **Install the New Wheel**: - Place the new wheel onto the spindle, ensuring it fits snugly against the inner flange. - Make sure the wheel is the correct size and type for your grinder and the task. 7. **Secure the Wheel**: - Place the outer flange over the wheel. - Thread the flange nut onto the spindle and tighten it by hand. - Use the wrench to further tighten the nut while holding the spindle lock. Do not overtighten. 8. **Check Alignment**: Ensure the wheel is properly aligned and spins freely without wobbling. 9. **Test the Grinder**: Plug the grinder back in and briefly turn it on to ensure the wheel is securely attached and operates smoothly. 10. **Safety Check**: Wear appropriate safety gear, such as goggles and gloves, before using the grinder.

An angle grinder is a versatile power tool commonly used in various industries and DIY projects. Its primary uses include: 1. **Cutting**: Angle grinders are equipped with cutting discs that can slice through metal, concrete, tile, and stone. They are often used in construction and metalworking to cut rebar, pipes, and sheet metal. 2. **Grinding**: With grinding discs, these tools can remove excess material, smooth rough edges, and shape metal or stone. This is particularly useful in welding to clean up welds and in metal fabrication to prepare surfaces. 3. **Polishing and Buffing**: By attaching polishing pads, angle grinders can polish metal surfaces, giving them a shiny finish. This is common in automotive work and metal restoration projects. 4. **Sanding**: Using sanding discs, angle grinders can sand down wood, metal, and plastic surfaces. This is useful for surface preparation, paint removal, and finishing tasks. 5. **Sharpening**: Angle grinders can sharpen blades and tools, such as lawnmower blades, axes, and chisels, by using appropriate grinding wheels. 6. **Surface Preparation**: They are used to remove rust, paint, and corrosion from metal surfaces, making them essential in maintenance and restoration work. 7. **Masonry Work**: With diamond blades, angle grinders can cut and shape bricks, tiles, and stones, making them invaluable in tiling and masonry projects. 8. **Demolition**: In demolition work, angle grinders can cut through various materials, aiding in the dismantling of structures. 9. **Cleaning**: Wire brush attachments can clean metal surfaces, remove burrs, and prepare surfaces for welding or painting. These tools are favored for their portability, power, and ability to handle a wide range of materials, making them indispensable in both professional and home settings.