How to Replace Wood Planer Blades How to Replace Wood Planer Blades

What You'll Need
A set of Allen wrenches
Adjustable wrench or socket wrenches
Magnets (these should have come with your planer when you purchased it)
Compressed air (optional)

A wood planer is a tool that's used to shave wood to a desired thickness. Many wood planers have double-sided blades which can be flipped around to provide a new cutting surface. Additionally, the planer blades can be sharpened to get them (almost) as good as new. However, after extended use and sharpening, you may find it necessary to replace the blades altogether. New wood planer blades can be purchased at most hardware stores or home improvement warehouses, as well as online at the manufacturer's website. Make sure that you buy a blade that is compatible with your tool's brand. Reference the owner's manual for specific information regarding the size and type of the blade.

Step 1—Remove the Chip Deflector

Before starting any work, make sure the planer is turned off and unplugged. Next, locate the chip deflector, which is a unit that covers the blades. Using an allen wrench, remove the socket head screws from the chip deflector and then remove the chip deflector unit, which will expose the blades.

Step 2—Removing the Old Blades

Carefully rotate the cutter head towards you. Once it has been spun about 180 degrees, it should be automatically locked in place by a latch on the side.  At this point you should see what is called the gib bar.  It is a metal bar with screws heads spaced about an inch apart. Using a wrench, loosen and remove the screws. When they are removed, use the magnets to lift up and remove the gib. After the gib has been removed you will see the blades. Use the magnets to remove them.  Be extremely careful, as even old, dull blades are still very sharp.

Step 3Installing the New Blades

Once the old blades have been removed, use compressed air to blow out any wood chips or other particles. If you don't have an air compressor this can also be done manually. Next, pick up the new blades with the magnets and install them. When the blades have been inserted, put the gib back into place with the magnets. It is important to make sure the holes on the gib are properly aligned with the holes on the new blades. Once the holes are lined up reinsert the screws but leave them a bit loose.

Step 4—Setting the Blade

Unlatch the safety lock and rotate the cutter head back to its original position. You will see the magnets have grooves on them which are used to set the blade to the correct depth.  Start with one magnet on one side. Put the magnet onto the blades and push down lightly. The blade should align with the grooves. Once the blade is set correctly, tighten the screws. Repeat this for the other side.

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