Hello everyone. While I was working on a project I realized I could really use a height gauge for my router bits and discs, so I've decided to make one based on commercially available ones using my digital caliper. You can download the Plans for free here.

Video for mobile devices.

Step 1: Easy to Assemble

I wanted to make one that would have to be easy to assemble and disassemble for convenience, so I decided to make use of a powerful screw pot magnet I had in my shop.

Step 2: Assemble

As you can see, it's very simple and easy to assemble, you only need to attach this end to the bottom of the magnet.

Step 3: How to Use

Let's see it in action. Place the gauge on the table and set it to zero. Now we position it on top of the router bit. We can see the height at which the router bit is at the moment, and I'm going to raise it to 10 milimetres.

Step 4: Height of a Cutting Disc

We can do the same to measure the height of a cutting disc.

Step 5: Depth of a Hole

In order to obtain a deeper measurement, I change the position of the magnet and zero out the caliper. Now we can determine the exact depth of a hole.

Step 6: Measure the Distance Between the Fence and the Cutting Disc

We can also use it to measure the distance between the fence and the cutting disc. We set the gauge to zero, rotate the tool and attach it to the disc in order to find out the exact width of the piece we want to cut. Having done that, I can zero it out again to work out the relative position of the fence. We can clamp the tool onto the disc to hold it in place.