The Erichsen 85-809-0022 Paint Borer 518 MC Wedge Cut Thickness Gauge, Complete Kit with #5 Drill Bit for Coatings up to 300µm / 12 mils is a compact instrument having all the principal components; drilling device, measuring microscope, specimen illumination and the battery enclosed in a sturdy housing. A slide moving on horizontal slide-ways houses the drill and microscope and gives the PAINT BORER 518 MC the unique advantage of not having to be moved for measurement after drilling. The Erichsen 85-809-0022 Paint Borer 518 MC Wedge Cut Thickness Gauge, Complete Kit with #5 Drill Bit for Coatings up to 300µm / 12 mils is the wedge cut method in which the specimen is cut at a defined angle. From the projected width of the cut face the layer thickness can be calculated using a simple geometrical relationship. The Model 518 MC limits damage to the coating to a small conical hole as illustrated in the sectional view. The measuring microscope displays a system of concentric circles and from the difference in the radii the film thickness can be calculated by multiplying with a known factor
