How to make a device for quickly sharpening a saw chain

If you have a dull chain on your petrol or electric saw, then you simply take a round needle file and start sharpening each tooth individually. On the one hand and on the other. Usually it takes about half an hour to do everything, and then your hands “fall off” from the painstaking work. There is a simple solution to mechanize part of the process using a screwdriver. To do this, you will need to make a simple device from any bearing.

Making a jig and quickly sharpening a saw chain

We take the bearing. If you have a choice, then take the one that is comfortable to hold in your hand.

We hammer a piece of branch or piece of wood into it. Everything should fit very tightly.

We cut off the wood on the sides so that only the inner ring of the bearing is filled with it.

Draw a cross with a pen on a ruler to find the center of the circle.

Now we drill a hole in the center, you can even use a nail if you don’t have a drill. At the same time, let's check the rotation to ensure there are no beats.

We hammer the round needle file into the center with the sharp end.

We fix the second end of the file into the screwdriver chuck.

The device is ready!

Chain sharpening

Now we sharpen the chain. Place it at an angle. We hold the bearing with our hand and hold the screwdriver with our other hand.
We start the rotation and sharpen each tooth in turn.

One and the other direction.

Thanks to the rotating needle file, sharpening is much faster and more accurate than moving the file manually to sharpen each tooth.
Roughly speaking, it took 10 minutes to sharpen the entire chainsaw chain.