In January 2024, the Health and Safety Executive (HSE) reported a tragic accident involving an angle grinder. A worker was cutting railway sleepers with a saw blade. In order to make it fit, he took off the tool's guard, then the tool kicked back during use and hit him in the groin. The injury was severe and caused his death.
This incident clearly shows why it is crucial to follow safety rules while using an angle grinder. Therefore, this article will discuss how to use this tool safely. Before that, it will discuss the types and common uses of this type of grinder. By learning this, workers can choose the right tool for their safety. Let's start reading!
What is an angle grinder?
An angle grinder or side grinder is a portable tool for grinding and polishing surfaces. This tool gets power from an electric motor, a petrol engine, or compressed air power. To use this tool, workers usually hold the handle and aim the tool at the object at several degrees. By using it in the right way, they can get the job done efficiently. Workers use it in many fields. For instance, metalwork, construction, and emergency rescue.
Just like a regular grinder, the purpose of an angle grinder is to cut, grind, and polish hard materials. However, its primary use is to clean welds and rust on metal, as well as smooth metal edges. To do those jobs, workers attach a disc that spins fast. Workers can change the discs depending on what job they want to do.
Typical uses of angle grinders
Most people buy an angle grinder to grind weld lumps, sharp corners, and rough surfaces. However, this device can do more. By changing the disc, people can use grinders for other jobs. It's perfect for removing old paint, stains, or surface flaws. People can also use it to cut through tile, concrete, metal, or even masonry. Here's the breakdown of the common uses:
- Material finishing: Angle grinders help workers create a clean finish on material. Workers use abrasive or sanding discs to give such an appearance.
- Removal of rust: A side grinder helps to get rid of rust and old paint on metal. Workers can use wire brushes, strip discs, or grinding wheels to do the job.
- Application of matte finishing: Fine-grit flap or polishing discs on an angle grinder create a matte finish on metal or stone. The tool gives a non-shiny look to materials.
- Blade sharpening: For sharpening tools, workers can use a disk grinder to grind the edges of the tool. As a result, it makes them sharp again.
- Emergency rescue: In emergencies, rescue teams use an angle grinder to cut through rough materials. For instance, locks and window bars.
Types of angle grinders
Before selecting an angle grinder, it's crucial to learn about the types. Every one of them is suitable for different jobs and situations. In addition to that, they come in various power sources and features. These characteristics affect how well it performs. Therefore, users can choose the best one for their projects.
In brief, cordless grinders offer freedom of movement. Meanwhile, corded grinders are ideal for heavy-duty tasks. On the other hand, pneumatic grinders run on compressed air. Variable speed grinders let users control the rotation speed. Finally, straight grinders can reach tight spots. Here's the breakdown:
Cordless grinder
A cordless angle grinder is a practical tool for construction jobs. It's popular on many worksites. Since they don't need to be plugged in, workers can easily bring them from place to place. It's handy, as it has no cables to trip over. As a result, workers can use it at high elevations.
Corded grinder
In contrast to a cordless grinder, a corded grinder gets its power from electricity through a plug-in cord. This feature gives it steady and reliable power. What's more interesting is that workers can use it for jobs that require long hours of work. This tool is best for heavy cutting, grinding, masonry, and metalwork.
Pneumatic grinder
A pneumatic angle grinder has a strong performance with long-lasting durability. Instead of using electricity, this tool connects to an air compressor to get its power. It handles heavy tasks well and can run for a long time without overheating. Besides, it's lighter than other models, thus it's easy to handle.
Variable speed grinder
A variable speed grinder allows users to change the speed to match the material. For instance, they can use high speed to cut metal. On the other hand, they can use a lower speed for polishing wood or concrete. Some models also include paddle switches for better control. These features improve safety for those who work with tough materials.
Straight grinders
Although it's different from a regular angle grinder, a straight grinder has a wheel that aligns with the motor shaft. This design allows better access to tight spaces that the regular angle grinders cannot reach. Therefore, it's ideal for deburring pipes, grinding welds, or fine sanding metal. Metalworkers, fabricators, and foundry workers usually use it in their workshops.
Choosing the right angle grinder
After learning about the types, it's time to learn about the considerations of choosing an angle grinder. Each of them has benefits depending on the task. Think about motor power, speed options, and how easy it is to carry. Those things help workers pick the right tool for the job. In this section, we'll break down what things workers need to think about when choosing a grinder.
- Motor power: Higher power helps a grinder cut tougher materials and run for a longer time. In general, 500–800W is enough for light jobs. Meanwhile, heavy tasks may need 1,500W or more.
- Power source: The source of power is crucial for choosing angle grinders because it specifies where the workers can grind. Corded grinders have powerful performance for heavy jobs. On the contrary, cordless grinders offer easy portability.
- Speed: Basically, an angle grinder runs between 5,000 and 11,000 revolutions per minute (RPM). With this in mind, variable speed models give workers flexibility because they can adjust the speed.
Safety tips for using angle grinders
To use an angle grinder safely, the first thing to do is to use the proper personal protection equipment. These include glasses, earmuffs, flame-resistant clothing, and gloves. After that, check the grinder before using it. Check the disk to ensure it's right for the job and in good condition. Besides, adjust the guard and make sure it's secure.
When using a grinder, let it reach full speed before touching the workpiece. This action helps to avoid kickback. Keep the grinder at a 15 to 30-degree angle and use light pressure on the material. Don't force it, as this action can cause accidents. Ensure to avoid flammable materials since sparks can fly from grinding.
After finishing your work, turn off the grinder. Wait for the disc to stop spinning before putting it down. Most importantly, unplug the tool when you change discs or make adjustments. Keep the angle grinder in a dry place to avoid moisture. Don't forget to check it regularly and replace worn parts right away. Following these safety steps protects workers and keeps everyone safer.
Conclusion
In conclusion, an angle grinder is a valuable tool for many jobs. Workers use this tool not only for construction jobs, but also in workshops or emergency rescue situations. Same with other grinders, this tool cuts, grinds, polishes, and removes rust or old paint from materials. However, using this device safely is just as important as knowing its functions. By following safety rules, workers can get good results without risk.
If you want to learn about safety practices on a site, the College of Contract Management has such courses. The courses are designed for students who wish to improve their skills in the construction field. Besides, the College offers flexibility, thus students can learn at their own pace. Explore our pages and create a prosperous future today!
