Getting the Most out of Your Jigsaw Blades
If you use a jigsaw, you’ll inevitably need a selection of jigsaw blades for it. Your jigsaw will come with a standard blade which will be fine for most projects. However, to get the most from your jigsaw blades, you need to understand them a little more.
Types Of Blades
There are three types of jigsaw blades in coarse, medium or fine grades. The classification depends on how many teeth per inch (or tpi) they have. The more teeth per inch on jigsaw blades, the finer and smoother the cut the blades will make on a specific material. A higher amount of teeth per inch will also result in a quicker cut.
The problem with jigsaw blades is that they tend to be thin and only have support on one end where they join the body of the jigsaw. this makes them very susceptible to bending or overheating. This can happen when they’re cutting through thin material especially if you use an inappropriate blade. Bending is more likely to happen when cutting through material that’s too thick. You need to know what your blade can cut through and not attempt to work on material that’s too thick.
High Speed Steel
High speed steel jigsaw blades are meant to be used on wood. Contrary to the name, they don’t actually move at an especially high speed but are actually designed to have greater penetration. They also have a high tpi that can guarantee a good cut on most types of wood. You can also use high speed steel blades on thin metal such as aluminum or tin. For this, you might be better advised to use a bi-metal blade. The biggest problem with these types of blades is that they’re not exceptionally durable so they’ll wear out quite easily. However, they can be resharpened.
For a blade that can stand up to harder work on thicker wood or metal, you’ll want one that’s made out of cobalt steel. The advantage to this is that they’ll last longer before you have to sharpen them again. In both instances, the blades can be sharpened several times before they need to be replaced.
Because you can cut other materials apart from wood or metal with your jigsaw, you will need a blade that can stand up to more arduous work and this is what carbide grit blades are made for. They can cut masonry board and even porous concrete. Although these blades are tipped in carbide for better cutting ability, they will still need frequent sharpening and replacement because of the materials involved in cutting. These will work on all types of harde materials including ceramics and marble. These blades have to be harder and more heat resistant than other types.
These are the three main types of jigsaw blades. Within each of type, there are a number of variations for different thicknesses of materials or for softer materials such as leather or carpet. You will need to consult charts for which variations are recommended for different materials and purchase your blades accordingly.