Linear, assembled, floating, and semi-floating mandrels

The Van Steel mandrel range includes linear and floating solutions designed to adapt to different line configurations and reduction levels. From in-line drawing to applications with high reductions, each type is developed to ensure operational reliability and consistent performance throughout the entire production cycle, meeting the requirements of the most demanding tube operations.

Solid linear mandrels

Solid rod-type mandrels are cylindrical mandrels designed for in-line tube drawing, ensuring dimensional stability and precise control of the internal diameter. This type of mandrel is used in cold drawing processes where continuous and uniform support along the tube axis is required, guaranteeing smooth material flow and high internal surface quality. Solid linear mandrels can be manufactured up to a maximum diameter of 25 mm, making them suitable for the production of small- and medium-sized tubes used in industrial, mechanical, and plant engineering applications.

Assembled linear mandrels for large-diameter tubes

Assembled linear mandrels are cylindrical mandrels designed for in-line tube drawing, consisting of a tungsten carbide core mounted on a high-strength steel shank. This design combines the wear resistance of tungsten carbide with the structural strength of steel, ensuring reliability even in demanding applications. They are particularly used for drawing large-diameter tubes, where stability, concentricity, and internal diameter control are critical. Assembled linear mandrels can reach diameters of up to 200 mm, making them suitable for industrial applications in the production of structural tubes, plant engineering components, and mechanical parts. They offer a reliable technical solution for tube manufacturers focused on producing large-section tubes with high quality standards.

Floating mandrels for bull block drawing

Floating mandrels are manufactured as a single solid piece of tungsten carbide, consisting of two cylindrical sections and one conical section. Thanks to this geometry, the mandrel can automatically align with the die cone during the drawing operation.
Unlike linear mandrels, floating mandrels do not require draw rods. Their self-aligning capability ensures correct positioning inside the tube, guaranteeing uniform internal diameter and stable process conditions. This characteristic makes floating mandrels particularly suitable for tube drawing on bull block machines, where ease of use and operational continuity are key factors. They are an ideal technical solution for tube drawing plants requiring efficiency, internal precision, and reliability throughout the production cycle.

Semi-floating mandrels

Semi-floating mandrels consist of an integral tungsten carbide section brazed onto a steel shank. They are mainly used in tube drawing processes requiring high reductions and smooth internal surfaces. With these types of mandrels, it is possible to achieve reductions of up to 48% on annealed materials.