Seamless rolled rings

Rail-vehicle tyres

Application Examples:
Seamless rolled, raw and machined wheel tyres, clamp rings and rim rings for resilient and tyred wheels used in railway rolling stock, including:

• Locomotives
• Trams
• Metro and underground systems
• Freight trains
• Railway wagons

Technical Advantages

• High resistance to cyclic and dynamic loading
• Reliable performance under demanding railway operating conditions
• Consistent material properties across the entire ring cross-section
• High dimensional accuracy for safety-critical wheel applications
• Long service life and predictable maintenance intervals

Product Data Sheet Wheel Tyres (PDF)

Flanges

Application Examples:
Seamless rolled and pre-machined flanges for pressure-vessel construction, pipeline systems, and process industry applications requiring reliable performance under pressure and mechanical loading.

Technical Advantages

• High structural integrity through seamless ring rolling
• Consistent material properties across the entire component
• High dimensional accuracy for demanding assembly requirements
• Suitable for pressure-retaining applications
• Reliable performance under long-term mechanical and thermal loads

Drill-pipe connectors

Application Examples:
Seamless rolled rings for drill pipe connectors used in special civil engineering, foundation construction, and drilling systems, as well as in demanding mechanical and plant engineering applications.

Product Data Sheet Drill Pipe Connectors (PDF)

Gearwheel blanks

Application Examples:
Seamless rolled rings used as gearwheel blanks in highly loaded drive systems, including spur and planetary gears, cam rings and flywheels for gearbox applications in mechanical and plant engineering.

Technical Advantages

• High strength and fatigue resistance for demanding drive applications
• Consistent material properties across the entire ring cross-section
• Excellent suitability for dynamic and cyclic loading conditions
• High dimensional accuracy for subsequent machining operations
• Reliable performance and long service life in heavily loaded transmission systems

Product Data Sheet Gearwheel Blanks (PDF)

Rolling-Element Bearings and Rotary Joints

Application Examples:
Seamless rolled rings for the manufacture of rolling-element bearings and rotary joints used in mechanical engineering, energy systems, industrial equipment, and heavy-duty rotating machinery.

Technical Advantages

• High fatigue resistance under continuous rolling and rotational loads
• Uniform material properties across the entire ring cross-section
• High dimensional accuracy for precision bearing and rotary joint applications
• Reliable performance under dynamic operating conditions
• Long service life in highly loaded rotating systems

Tool Steel Rings and Rings for the Energy Sector

Application Examples:
Seamless rolled and pre-machined rings for toolmaking, energy machinery and power-generation equipment. Heat treatment and mechanical machining are performed on a project-specific basis according to customer requirements..

Technical Advantages

• High strength and toughness for demanding operating conditions
• Consistent material properties across the entire ring cross-section
• High dimensional accuracy for subsequent machining and assembly
• Suitable for applications exposed to high mechanical and thermal loads
• Reliable performance and long service life in toolmaking and energy-related applications

Further grades, dimensions, delivery conditions and standards according to customer requirements.

Frequently Asked Questions

What dimensions are possible for seamless rolled rings?
Depending on the design and the project-specific technological assessment, seamless rolled rings can be manufactured in large diameters:

Finished dimensions:

• Outer diameter: 300–4,000 mm
• Height: up to 570 mm

Rolled dimensions (raw):

• Outer diameter: < 4,000 mm
• Height: < 600 mm

Delivery weight: up to 4,000 kg, depending on the project
Different dimensions and larger formats available on request.

Which steel grades can be processed into seamless rolled rings?
Schmiedewerke Gröditz manufactures seamless rolled rings from a broad range of steel grades, including:

• Unalloyed and alloyed engineering steels
• Quality steels
• Case-hardening steels
• Nitriding steels
• Tool steels, including cold-work and hot-work steels

Stainless steels, including:

• Austenitic grades
• Ferritic grades
• Duplex grades
• Martensitic grades

Production is carried out according to national and international standards or customer-specific specifications.

What you can expect

Reliable Performance Under Load
Seamless rolled rings with homogeneous material properties, high dimensional accuracy and the strength required for demanding applications in energy, railway technology, bearing production, and mechanical engineering.

Integrated Manufacturing Expertise
From GMH-produced ingots and billets to ring rolling, heat treatment and optional machining, we control key manufacturing steps to ensure consistent quality throughout the process.

Broad Material and Dimension Range
A wide range of steel grades and ring dimensions up to an outer diameter of 4,000 mm enables application-specific solutions for highly loaded components.