The boring head of type 391.37A is a fine product for various applications in the industry. The dedicated boring bars and sleeves, for the finish boring of diameters from 3 to 42mm come with a vernier and scale-disc, which can be turned to change the diameter by 0.01mm. The vernier can set this change to be 0.002mm.
The boring bars have entering angles evaluated between 90 and 92 degrees, while the shanks come in sizes of 16, 20 or 25mm and are provided with a scribed circle that indicates the minimum clamping length. Finally, when a user puts the sleeve to work, they will find that one of the clamping screws is directly clamping on the sleeve's surface.