Changing a saw blade is a short job when done in the right order, and the order begins with removing power. The exact steps differ between models, so these notes are general only. Always use your saw’s manual for the arbor lock, wrench and torque details, and follow its safety instructions.
Before You Touch the Blade
- Switch the saw off and unplug it, or remove the battery on a cordless model.
- Wait until the blade has fully stopped and has cooled, since used blades can be hot and sharp.
- Clear the area and put the saw on a stable surface.
- Wear cut-resistant gloves only if your manual allows, and handle the blade by the body, away from the teeth.
- Have the correct blade ready, matching the arbor size, diameter and saw type given in the manual.
Removing the Old Blade
- Locate the arbor nut or bolt in the centre of the blade.
- Engage the arbor lock button or hold the blade with a wood block, as the manual shows. Some saws supply a wrench and a spindle lock.
- Turn the nut the direction the manual states. Many saws use a reverse thread on one side, so do not assume it is the normal direction.
- Remove the nut and the outer washer or flange. Note which way they face.
- Retract the lower guard if needed, using its lever, and lift the blade away.
- Clean sawdust from the washers and the arbor with a brush.
Fitting the New Blade
| Check | Why it matters | What to look for |
|---|---|---|
| Rotation arrow | Blade must spin the right direction | Arrow on the blade matches the arrow on the saw |
| Arbor hole size | Must fit the shaft without play | Size listed in the manual |
| Washer orientation | Holds the blade flat | Flat faces against the blade |
| Tooth type | Affects the cut | Rip, crosscut or combination for your material |
- Slide the blade onto the arbor against the inner washer, with the rotation arrow lined up.
- Refit the outer washer and nut, with the orientation noted earlier.
- Engage the arbor lock and tighten the nut firmly, in the direction the manual describes. Do not use extensions or hammers unless the manual says so.
- Release the lock and spin the blade by hand to check it is centred and clear of the guard.
- Confirm the guard moves freely and returns to place.
- Reconnect power only after everything is in place and tools are clear of the blade.
On a table saw, also check the riving knife or splitter, the throat plate and the blade height, as the manual describes.
FAQ
How do I know when a blade is worn?
Burn marks, extra force needed, ragged cuts and chipped teeth are signs. A blade with missing teeth should be replaced.
Can I clean and reuse a blade?
Resin build-up can be cleaned with a product the maker suggests. Do not use a blade that is bent or cracked.
The Short Version
Disconnect power, lock the arbor, remove the old blade and fit the new one with the rotation arrow correct. Check the guard, and follow your saw’s manual for all details.