Hole saws are versatile tools with many applications. Below is a list of their advantages and disadvantages to help you decide whether this is the right tool for you.
Advantages
1. One of the chief advantages of using a hole saw over a conventional drill bit is the hole saw’s efficiency. Due to the fact that so little of the total amount of material being removed is actually cut, much less power is required.
2. Because less power is needed, you save energyand increase the battery life of your portable power tools.
3. Another advantage is the hole saw’s ability to cut a greater variation of hole sizes. There are a wide range of diameters available on the market that can cut with ease when compared with a twist drill or spade drill trying to perform the same task.
Disadvantages
1. The drill you use to power your hole saw must produce high levels of torque due to the amount of friction created by sawing a hole into often dense materials. Without high levels of torque, you will not have enough power to cut consistently.
18 Volt Combi-drills with variable speed function have the high levels of torque needed for use with hole saws.
2. Hole saws may become stuckin the object they are cutting (especially if choked with dust). To prevent this happening, be sure to back out your hole saw every so often to clear the chippings and dust. if you are cutting metal, use a cutting oil to help lubricate the saw.
3. A powerful drill may occasionally “kick back” if the hole saw gets snagged or stuck. It is advised, where possible, to use a side-handle on your drill for extra stability
4. The slug of waste material may become stuck inside the saw blade and need to be pried out (this is less likely to happen if your arbor has an ejector spring!).