From the individual machine to complete rolling lines for steel, aluminum, and non-ferrous metals

SMS group has banked almost 100 years of experience in ring and wheel rolling. This dates back to Keller & Banning Maschinenfabrik und Eisengießerei (machine works and iron foundry) and Wagner Maschinenfabrik. Today, our ring and wheel-rolling activities stand for innovative technology, precision, and top quality. Almost 600 ring-rolling machines, over 100 complete plants and facilities, as well as satisfied customers all over the world conclusively prove our leading position. So you can rest assured, we know the industry inside out and we meet your expectations.

Ring rolling:

  • Ring sizes: 100–16,000 mm
  • Ring heights: 20–5,000 mm
  • Ring shapes: Rectangular cross sections, wide range of inner and outer profiles
  • Materials:
    • Carbon steels, low and high-alloy steels, austenitic steels,
    • Inconel, Hastelloy, Waspaloy, Incoloy, Nimonic
    • Non-ferrous metals such as titanium, aluminum, and copper alloys

Wheel rolling:

  • Max. wheel diameter 1,450 mm
  • Max. wheel weight 1,500 kg

Plant types

  • Ring blank presses

    Top quality starts with the blank

    Ring blanks are crucial to your products. The better the starting product matches the final ring shape, the more cost-efficient your downstream processes are. This in turn means higher productivity. That’s how you benefit from our reliable, future-proof ring blank presses with press forces of up to 100 MN.

    The manufacturing of forged ring blanks involves upsetting, pre-piercing, and piercing. There is also an extra step for profiled blanks in the form of profiling. Blanks for sleeve-type rings are forged in a pot die. So, whatever the application and the power range you want – we supply the right ring blank press for you.

    Ring blank presses


    • Highly flexible, modular design
    • Highly adaptable to changing plant demands or market requirements
    • Lines designed to suit your ring and lot sizes
    • Rapid tool changing for cost-effective production
  • Radial and radial-axial ring rolling machines

    Wide range of ring profiles

    Main data

    Our RAW ring rolling machines produce rings by enlarging the diameter of ring blanks. The process works like this: first, the blanks are heated to forging temperature. Then, our radial ring rolling machines reduce their wall thickness using a main roll and a mandrel. Alternatively, radial-axial ring rolling involves two axial rolls that simultaneously decrease the height of the blanks.

    Application of the products extends from antifriction bearings in all forms, to the aerospace industry, through to crawler-mounted and rail-bound vehicles. The highest precision levels are required when it comes to gearbox and machine construction, and the maximum load-bearing capacity is a must for tank and vessel construction. Rings are likewise indispensable in power plants, in the oil and gas industry, and in the chemicals industry.

    Radial and radial-axial ring rolling machines
  • RAW ecompact®

    Innovative drive concept for ring production

    What’s best about our new electrohydraulic drive solution is that it saves you serious money. That’s because it consumes between 25 and 50 % less energy than conventional ring rolling machines. Instead of a large central hydraulic system, several small, self-contained electrohydraulic drives provide the necessary energy – wherever and whenever you need it.


    • Low investment costs
    • Reduced energy consumption (up to -50 %)
    • Lower operating costs (e.g. utility costs: -15 %)
    • Lower noise emissions (-15 %)
    • Compact dimensions
    • Automatic control and software included
    • Short delivery times and fast commissioning
  • Ring expanders

    Perfectly calibrated rings save material, time and costs

    SMS group designs and supplies ring expanders suitable for the ring rolling machines. The core components are a hydraulically movable expanding cone and expanding jaws. This is how you achieve excellent plastic deformation of rings. It's an extra advantage that the control system automatically accounts for the spring-back and compensates it during the next expanding stroke.


    • Integrated turning device for higher precision
    • Single-stroke calibration for automated lines
    • EXPANTRONIC software for fully automated expanding sequence
    • Lower production costs due to near-net-shape execution
    Ring expander
  • MERW

    High production rates of small rings

    The multi-mandrel radial ring rolling machine type MERW is designated for ring diameters of between 100 mm and 500 mm. The MERW small-ring rolling machine is designed for high volume production in an automated plant. We customize your machine so you always roll exactly the profiled and rectangular rings you require. It's the only proven way to ensure you get both - top precision and low costs.


    • Purely mechanical drive for maximum precision
    • High productivity with turret head for simultaneous loading and unloading
    • Low material losses due to small mandrel diameter with guided support
    • Rapid tool changes for longer productive times
    • Easy operation and maintenance for shorter non-productive times
    Multi-mandrel radial ring rolling
  • Axial closed-die rolling machines

    Up to 30 % material and cost savings

    Axial closed-die rolling is ideal for many applications. You can use it to roll virtually all rotationally symmetrical workpieces from any forgeable material. Included here are not only axle drive wheels but also aluminum wheels. These wheels come with excellent properties that make them predestined for racing cars.


    • Up to 30 % material savings compared with the traditional close-die forging process
    • Lower heating and machining costs
    • Up to 20 % lower force compared with conventional closed-die forging
    • Wide variety of applications such as axle drive wheels, bevel gears, flanges, roller bearing rings, synchronizer rings, engine parts, aluminum wheels, turbine discs
    Axial closed-die ring rolling
  • Wheel rolling machines and lines for steel

    Top cost efficiency, precision, and service life

    SMS group offers integrated wheel rolling lines for capacity requirements in the range of 100,000–500,000 wheels per year, in which all the line components are perfectly coordinated with one another. Wheel rolling machines produce solid wheels and wheel disks. Typical applications are wheels for rail-bound vehicles such as locomotives, carriages, and subway trains. To ensure high precision and smooth running, our machines feature two web rolls that simultaneously roll the wheel web and the inside of the tread.

    SMS group provides the wheel rolling lines with specialized presses – for the manufacturing of the necessary wheel blanks as well as dishing and piercing of the wheels after rolling – depending on the production capacity.

    Wheel rolling machines and lines for steel

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  • ROLLTECH for rings, wheels, flanges, and profiles

    ROLLTECH gets your process rolling

    Included among today’s most important and powerful technology systems for ring and wheel rolling is ROLLTECH – our software package that runs on standard PCs. Primarily it is used in job preparation, where the entire ring or wheel production process can be planned, from the ingoing material to the finished rolled product.


    • Easily assesses product feasibility
    • Ensures perfectly reproducible results – from billet selection to the machined finished form
    • Design support with automatic profile contour drawings for tooling
    • Full overview of primary materials for your warehouse and saw shop
    • All process data for hot forming – from the furnace through to heat treatment
    • Latest data for your entire system from a centralized data pool
    • Support for the entire process from blanking press to finished rolled part
  • Line laser

    By using a line laser to measure the outer contour of the ring, the geometry of the outside diameter can be captured in a non-contact way over the whole ring height during the ring rolling process, and any deviations from the desired shape can be identified. This can be done not only for rings with a smooth outer contour but also primarily for rings with an outer profile.

  • Ring Monitoring System - RMS

    Control strategy for reproducible rolling results

    Working in conjunction with the line laser, the RMS (ring monitoring system) delivers real-time measurements that are displayed in graphical form as the ring geometry and form defects. Form defects can be reduced or avoided entirely thanks to direct feedback to the machine control and interventions in the rolling strategy. This control strategy enables reproducible rolling results and reliably ensures close manufacturing tolerances.

    Screen ring monitoring system

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