How to Change a Circular Saw Blade
If you have ever been working on a project and the blade of your circular saw has become too dull to finish, then this article is for you.
There are many different methods that people use to change their blades, but the easiest way is explained below.
- Disconnect any cords from power before beginning a project with a circular saw.
- Remove the blade guard that is connected with screws. Make sure you do not lose the screws when doing this because, they can be easily misplaced or lost even in a small project like this one.
- There will now be a gap between the saw and its lock handle which you can slip your wrench into to loosen any nuts there may be on it. Loosen these until the blade is free of the machine.
- Slip your new blade onto the spindle with any spacers attached to it properly so that it does not interfere with the motor of the machine, but close enough so that it does not move while being tightened.
- Tighten each nut using your wrench while holding down on part of the spindle so that the blade does not fly off.
- Put the guard back on and re-connect any cords to power before turning it on.
When To Replace Your Circular Saw Blade?
It is important to replace worn or broken blades for your circular saw because they are dangerous.
If the blade has nicks, chips, bends, notches, or if it is badly corroded then you need to replace it with a new one immediately.
Nicks and chips in the blade can slow down the performance of the machine or lead to accidents, but most importantly they can damage other blades too.
It is also crucial that you change bent blades right away because they make the machine harder to control which makes it easier for somebody to get hurt.
If the task at hand requires you to use a specific blade size
You need to make many cuts with a blade that is 7.5″ in diameter (7 & 1/4″ and smaller are not likely to be used as often as those an inch or more larger) then you should replace the blade even if it is only slightly dull.
This is because this size of blade does not come as standard on most household circular saws and so you would be forced to buy a more expensive one than necessary which will cost more and waste time.
A standard carpentering blade has 24 teeth, but some blades may have 32 teeth which cut faster, but cause more kickback on the machine.
If you do not know whether or not your machine can handle such a high number of teeth then it is best not to use it and buy a lower tooth count blade instead.
It’s better to replace your circular saw blades before they get too dull and damage other parts of your machine.
A brand new blade can be bought from any hardware store for under $20, but cheaper blades exist which do the same job for half that price or less.
In addition, most hardware stores sell two-packs of blades that are slightly different in size so that you do not have to purchase another when one gets dull.
A word of caution: Never try to sharpen a circular saw blade because if done incorrectly it will make the metal too thin and weak which makes them more likely to shatter or snap on a project, possibly sending pieces flying in all directions dangerously.
Circular saw blades are used for cutting through many different types of materials, so you not only need to think about their size but also what they are being used for.
Depending on the material it is best to use a specific number of teeth count, angle, and plywood rating.
Plywood rating: Wood is not as hard as metal and therefore it dulls saw blades quicker. If you are cutting through plywood then your blade should have a high number of teeth which can cut through its surface more easily.
Angle: A lower angle means that the blade will give less resistance to the material being cut, but it tends to be weaker because if one tooth breaks on this type of blade it causes all the others beside it to snap too.
Therefore, circular saw blades used for cutting metals tend to be angled upwards more so that they can maintain their strength while still giving good cut results.
Number of Teeth: Circular saw blades with many teeth are best used for making smoother cuts in wood, but if you are cutting metal then a blade with fewer teeth is better.
Metal saw blades have a tendency to grab the material being cut and cause it to spin out of control, so having more teeth helps prevent this from happening.
Non-ferrous metals: Circular saws work best on ferrous metals which include iron, steel, nickel alloys, some types of stainless steel etc.
However non-ferrous metals such as aluminum or copper cannot be cut very easily with the machine because their lack of magnetic properties causes them not to stick to the blade as designed resulting in poor cuts and fracture of the materials.
In order to cut these metals effectively you need an abrasive disc cutter (see tool section).
The Best Budget Circular Saws
The best budget circular saws will cost around $100 and the more expensive ones can be found for over $250.
But, there are quality carpenter’s circular saw blades which can cut through wood and metal with ease that don’t even reach half of that price and still function very well.
So it all depends on how much you want to spend and what types of materials you need them to cut effectively.
How do I know which size of wrench I need?
Circular saws vary in size by their horsepower, so knowing the size of your machine is key to buying a good wrench for this project.
Furthermore, if you have an electric or cordless version of your saw, then its shape will be different than one with a cord attached to it.
Experiment trying different wrenches until you find one that fits securely around all of your nuts or bolts. Can I use another type of wrench instead?
You can always find a substitute for a wrench, but it may not fit perfectly. If you have another type of tool that will fit around your nuts or bolts securely then go ahead and try it out.
Be careful when using new tools because they could damage the parts of your saw if they are too big or small.
How Do You Know When Your Circular Saw Blade is Dull?
There are many telltale signs that your circular saw blade is becoming dull.
One of the most obvious would be when you try to cut through something and it takes more than one or two attempts to even create a small indent in it.
If you find yourself making multiple strokes over the same area before finally cutting it, then your blade needs replacing soon because if you keep forcing it, the blade could snap off while cutting which can cause damage to both the project and whoever is using the machine.
What Can I Do If My Machine Does Not Have Loosening Nuts?
Some machines require you to use a special key instead of a wrench to loosen the blade.
If this is the case, then you will need to procure that tool before figuring out how to change your circular saw blade.
There are some models where you do not need to touch any nuts at all; they pop right out once you press on them correctly which is why reading directions thoroughly can save you time and frustration when working with tools like these.
Safety Measures to Follow while Changing Your Circular Saw Blade?
Circular saw blades are very sharp and dangerous.
This machine can cut through your hand without too much force if it slips while you are using it so please be extremely careful before reaching in to remove or attach a blade.
Make sure the power is off and any guards have been removed from the area surrounding your cutting surface first.
Before working on a circular saw, always make sure the machine has been turned off and unplugged from any power source.
You should also remove all guarding that could come into contact with you as well as other people who may be present during this process.
In addition, protective eyewear is not a bad idea to wear to protect your eyes against flying debris just in case something happens.
Circular saws are some of the most useful power tools available today.
They can cut through dense wood or tough metals with ease while being used by skilled craftsmen or beginners who have never even held a saw before.
The more you use your saw, the more its blade will begin to dull and become more difficult to control.
Changing this part of the machine every once in awhile is essential for safe operation so just follow these steps on how to change a circular saw blade next time yours needs replacing.