The lapped, robust spindle runs in a honed hole and is sealed against dust. With degree scale. The radius movement is limited by adjustable stops. The arm with the dressing diamond is height-adjustable using threads. A fine-adjustment screw on the arm can be used to move the diamond into the correct position. The precision radius dresser is delivered with 3 exchangeable dressing inserts and dressing arm 2 as a standard. 2 additional arms with a larger range for the dressing radius are available. Arm 3 with a 100 mm raising foot for dressing larger radii.