400+ materials

200+ employees

100+ years of experience

Seamless Rolled Rings for demanding Industries

Rosswag is specialized in the production of seamless rolled rings. Utilizing precision technology and extensive expertise, we deliver rings that offer superior structural integrity and dimensional accuracy. Our products are ideal for demanding applications, with capabilities to produce rings up to three meters in diameter.

Seamless rolled rings

Seamless rolled rings are precisely shaped metal rings created without welds for enhanced strength and integrity.

up to 3 m diameter

Forged parts can be produced with diameters of up to 3 meters, accommodating large-scale applications.

CNC Control

CNC control ensures precise and automated machining for complex and accurate manufacturing processes.

400+: Our Range of Materials

We offer the most diverse portfolio of materials for open-die forging in the global market!


Technical equipment

Rosswag operates multipple hydraulic presses with 800 up to 3500 tons as well as air and drop hammers. For the wide range of different materials many furnaces are used for the different temperature levels. Heat Treatment furnaces and quenching basin with oil and water complete the holistic equipment for our forging services.


Frequently Asked Questions

How does Ring-Rolling work?

Ring-rolling is a specialized forging process that produces seamless rings. The process begins with a preformed piece of metal, called a “doughnut,” which is heated and then placed on the ring mill. As the ring mill’s mandrel rolls rotate, they exert pressure on the doughnut, expanding its diameter and reducing its thickness to form a ring. This method allows for precise control over the ring’s final dimensions.

What are the advantages of Ring-Rolling?

The main advantages of ring-rolling include:

  1. Uniformity and Precision: The seamless nature of rings produced by ring-rolling ensures uniform structural integrity and precise dimensional control.
  2. Material Efficiency: This process minimizes waste as the ring shape is formed directly from the doughnut, optimizing the use of material.
  3. Versatility: Ring-rolling can create a wide range of diameters and weights, suitable for various applications, from small bearings to large-scale wind turbines.

What materials can be processed through ring-rolling?

Ring-rolling can handle a variety of ferrous and non-ferrous materials. Commonly used materials include carbon steel, stainless steel, alloy steels, titanium, and high-temperature alloys. These materials are chosen based on the required mechanical properties and operational demands of the finished rings.

What is the typical size range for rings produced by ring-rolling?

The size range for rings produced by ring-rolling can vary significantly. Rosswag is equipped to manufacture rings with diameters ranging from a few inches up to 3 meters. The maximum size is dependent on the specific capabilities of the ring-rolling machinery and the material properties.

In which industries are ring-rolled products most commonly used?

Ring-rolled products are essential in many industries due to their strength and durability. Key industries include aerospace, where they are used in engines and structural components; energy, particularly in turbines and generators; oil and gas, for flanges; and the automotive sector, for gears and bearings. Each industry values the high performance and reliability of ring-rolled components.

How can we help you?

Do you have questions about the feasibility of a project? Then simply contact us directly!