So what size angle grinder should I buy? This is the million dollar question in most DIYers and craftsmen minds. To answer this question, it is important to note that the angle grinder size to go for is dependent on numerous factors to think about.
Also, when you talk about the angle grinder size, it is determined by the grinder disc and not the overall length of the tool. We understand that making this decision can be quite a challenge considering the tons of information on the internet already.
However, in this article, we shall make this decision-making process a lot easier for you. Let us look at the factors to consider.
#1.Type of Task
The type of tasks can range from light to medium to heavy. Different angle grinders are for different tasks. Most handymen assume that the grinder size is dependent on the length of the tool, but this is not always the case. Bigger angle grinders are normally long in order to accommodate the big discs.
Also, most handymen prefer 4.5-inch angle grinders because they are lighter, have a smaller frame and are good for home projects. In addition, they are best for light to medium tasks. So a 4.5-inch disc is best for such a grinder while a 7-inch angle grinder works best with a 7-inch disc and so on.
The bigger the angle grinder, the larger the disc and thus, in turn, will be best for heavy duty tasks. For example, when you try to use a 4.5-inch disc to cut through a wooden beam, it will definitely be a chore, but with a 7-inch disc, it will be easy.9-inch grinders were popular and preferred for heavy duty tasks, but were outlawed because they caused too many accidents.
#2.Type and Size of Material
Most angle grinders can cut through wood, although if the piece of wood is thick, smaller angle grinders will be difficult to use for this. With other materials, such as stone or concrete, small angle grinders may not be the best choice.
This is because such materials are strong and thick. For example, a 5-inch grinder with a 5-inch disc cannot cut through thick concrete or wood because the diameter will only allow half the size to pass through.
Therefore, the best angle grinder size for thick materials such as concrete and stone are those with 7-inch discs and above. This will make deeper cuts easily.
It is common knowledge that smaller discs tend to spin faster than larger discs. With the smaller diameter, thus smaller circumference, they are able to reach about 11000 revolutions per minute (rpm). This means they can be used polishing and cutting surfaces.
The disadvantage of using smaller discs is that at those high speeds, they often overheat. It is advisable to choose an angle grinder with an adjustable speed setting so that you can have some level of control.
Needless to say, you should be aware that the speed of the angle grinder goes hand in hand with the amp rating of the motor. This means that even though a 5-inch angle grinder can spin faster, a 7-inch angle grinder with a higher amp motor can be fast, if not faster than the smaller disc with a lower amp motor.
#4.Level of Expertise
Last but not least, an important factor to consider is your level of expertise as a handyman. For beginners, it is better and safer to start with a smaller grinder, then as you keep getting better, you can upgrade.
On the other hand, for professionals, they can use the larger grinders, such as the 7-inch angle grinders as they can handle the more advanced features. Actually, large grinders can be so strong they will need two hands to be controlled.
No matter the size of the angle grinder, it is paramount to observe safety first. Always have safety gear on when grinding, polishing, sharpening or cutting surfaces in order to avoid any accidents. Clearly, choosing an angle grinder is not that complicated.
Once you understand these factors listed, you are on your way to choosing the best angle grinder for your needs that match the grinder size required.