How to Change a Radial Arm Saw Blade

What You'll Need
New saw blade
Wrench or ratchet with correct size socket

A radial arm saw is a great invention that places a rotary saw on a stationary arm. The saw functions best when the radial arm saw blade is sharp. It doesn't take long to change your saw blade. You'll need less than 15 minutes once you get the hang of it, and only simple tools are needed for the job.

Step 1: Preparation

You always want to be safe when working around power tools. Turn off the power and unplug the machine. Even with the power off, the machine is being fed power and can be accidentally turned on. The other part of preparation is to ensure that you have selected the correct blade. You need one that fits the tool correctly, and you also need one that works with the material you are planning to cut.

Step 2: Remove Saw Guard and Blade

In order to get to the blade and the saw nut, you need to remove the saw guard. After the saw guard is off, remove the nut with the correct size wrench. Once you have removed the nut, you will be able to take off the arbor collar and the blade. Remember to do this gently, since the blade is still sharp. The inside arbor collar might come off with the blade, so make sure you keep track of which direction it needs to be reinstalled.

Step 3: Replace Arbor Collar And Blade

You will need to replace the interior arbor collar before placing the new blade on. The correct way for the arbor collar to face is with the recessed edge towards the blade. After you have place the arbor collar, place on the blade. The blade needs to be put on with the teeth pointing in the direction that the saw turns. If the blade moves counterclockwise when you're looking at it, the blade will go on with the teeth pointing down on the left side.

Step 4: Replace and Tighten

After the blade is on, you need to place the exterior arbor collar, then the nut. Tighten the nut with the same tool that you used to loosen it. Make sure the nut is tight. Extra force may be needed to ensure safety. Use your hand to make a manual turn of the blade and make certain that there is nothing impeding the motion.

Step 5: Check for Square and Replace Saw Guard

While you have the guard off, it's a good time to check that the blade is square. This means that you want to make sure that it's level and even. If it's out of alignment, you will want to check your owner's manual for the proper way to adjust the blade. After that, it's time to replace the saw blade guard.

Once you have done this a few times for different projects, it will seem like second nature to change the radial arm saw blade safely.