Measuring Chamfers

Here at Level Engineering we take measuring chamfers seriously. We have designed and manufactured a device to accurately measure the width of a 45 degree chamfer on a straight edge of a machined part. 

How It Works

The device works through the combination of an anvil and a micrometer thimble. We machined an anvil that has features to locate itself on a straight 45 degree chamfer and has a bore to let the spindle of a micrometer thimble pass through. This anvil is secured to the micrometer thimble so that the spindle can pass freely through the anvil bore and touch off against the flat surface of the chamfer it is measuring (Figure 1). Figure 2 shows a diagram of the measurement that is taken. 

Figure 2: Diagram Representing The Measurement Taken By The Device

How to Derive the Chamfer Width ​

The measurement from the device gives the user the depth of the chamfer. To derive the width of the chamfer, we use some basic trigonometry. For a 45 degree chamfer, the width of the chamfer can be calculated from the following formula.  

Width = Depth / 0.707

​The table below shows some common width values for a 45 degree chamfer.