How To Sharpen Planer Blades

If you own a planer at home, you would know that cleaning and maintaining the planer are very important if you want this piece of machinery to perform well. In addition, when your planer is in good condition, it will last for many years. Among all of the parts in the planer, the blades of the planer are some of the most important parts. They help the planer to do its job properly and prevent unwanted accidents when you use the machine.

And in order to maintain the planer blades, you need to know how to sharpen them. This task is not difficult at all if you know which tools to use and which steps to follow. Read this guide below to see how to sharpen planner blades in the most effective way.


For this method, you should use a whetstone in order to sharpen the blades of a planer.

Source: Sharpen Planer Blades

• Pros of this method: For this method, you don’t have to create any complicated jib in order to do the job. You can also use this method for all type of planers, whether they are floor standing planer, lunch box planer or benchtop planer.

• Cons of this method: However, this method requires you to be more careful with the blades in order to prevent the sharp blades from causing damage to your body.

Step 1: First of all, you need to prepare the blades for them to be sharpened. Take the guide out and place it onto a clean and even surface. Then place the blades of the planer out and place it to the guide. Position the blades carefully so that they are in the bevel side down position.

Step 2: Apply a thin layer of tapping oil on the whetstone. Tapping oil will help to clean off metal more effectively.

Step 3: Use the coarse side of the whetstone in order to remove any nick on the blade of the planer. Push the whetstone along the blade. Don’t pull the whetstone in order to prevent burr on the edge of the blades.

Step 4: After you get rid of the nicks on the blade, move whetstone on the blades to sharpen them. Remember that you should only apply the stone onto the areas at which there is no vibration. If the blades move rigorously during the process of sharpening, it will lead to a curved edge on the blades of the planer.

Step 5: After you sharpen the blades of the planner with the whetstone, use the medium and fine grit to further sharpen these blades.

For the second method, I am going to use a sharpening jig for sharpening the planer blades

• Pros of this method: This method is more effective in term of sharpening the planer blades. Another great benefit of this method is that you don’t have to take the blades out for sharpening. As a result, it is safer for you.

• Cons of this method: This method only works for floor standing planer. It doesn’t work for some lunch box and benchtop planer.

source: www.finewoodworking.com

Step 1: First, you need to set up the sharpening jig. Take the look at the picture below to see all of the parts of this sharpening jig. The type of wood which can be used is the dense and hard type of wood like maple.

Alternatively, you can buy a ready-made sharpening jig at any local store. This planer sharpener is made to help you to hone as well as sharpen both sides of the planer blades without having to take off the blades. Some products also come with coarse and fine grit.

Step 2: Place this sharpening jig on the top of the cutterhead. Adjust the cutterhead so that the bevel side of the planer blade is placed under the stone. Make sure that it also points toward the center of the sharpening stone as well.

Step 3: Lock down the cutterhead. This will prevent the blades from moving and causing frictions. There are 2 main ways you can use to lock down the cutterhead. The first method is you can clamp the belts of the cutterhead to the pulley. The second method is clamping the cutterhead with a wedge.

Step 4: Move and tilt the sharpening jig forward several times to sharpen the blades of the planer.

Finally, here are some safety precautions to take note when you deal with the planer and its blades:

  • 1. Before you sharpen the planer blades, make sure you turn off and unplug the machine.
  • 2. Since the blades are rough, even the dull ones will be sharp enough to cut you, you need to be careful. Never brush up against these blades. Some blades have two sharp sides so be careful whenever you handle any blade.
  • 3. Apply a lot of pressure on the planer blades and the sharpening tools. It will help to keep the blades away from vibrating.
  • 4. Remember that you need to check the blades of the planer frequently to make sure they always stay sharp and flat. You can check for the conditions of the planer blades by tilting them toward the light. If the planer blades are in good condition, they would look flat.
  • 5. There are several sharpening tools that you can use as well. For example, you can use the coarse grit, the waterstones which are from 1000 to 8000 grit, sandpaper or oilstone. The choice of which sharpening tools to use is purely based on your personal preference.

Here are all of the steps you should follow in order to sharpen planer blades. It is critical for the machine to keep up the good work if you keep sharpening the blades frequently. You can use a whetstone for this task. Alternatively, you can set up a sharpening jig so that you can sharpen the blades without taking them out of the machine. I hope that with all of the information above, you would be able to find the best and most suitable way to sharpen the planer blades. Remember the safety tips as well and you will never fail on sharpening planer blades.