Cold pilger technology

Tube and pipe making
Cost-efficient and indispensable for many applications

Our cold pilger mills use a special cold forming process which is both cost-efficient and indispensable for many applications. It involves a large number of forming steps to improve roundness, stress homogeneity, and surface roughness of the tubes. You can even apply our cold pilger mills to produce difficult materials beyond the capabilities of other processes.

Cold pilger mill

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Cold pilgering process

Multi-step forming guarantees high-quality seamless tubes

Cold pilgering is a rolling process for metal tubes that reduces diameters and wall thicknesses.

The Process

Located inside the tube is a stationary mandrel (1) which tapers in the rolling direction. This is attached to a long mandrel bar (4) which is secured in, and rotated by, a thrust block. Two dies (2) "form" the tubular stock in the same way that a rolling pin rolls out pastry. These two dies are mounted in a reciprocating saddle (3). Their drive pinions mesh with two stationary racks. That's how the dies rotate back and forth in synchronization with the reciprocating saddle. The saddle, in turn, is moved back and forth by a crank drive in the same way as a piston in the engine of a motor car.

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Your extra benefits
from the cold tube rolling process

  • High range of cross-sections
  • Reduction per pass savings in intermediate processes (annealing, pickling, straightening, cutting)
  • No process-related material losses
  • Improved product eccentricity
  • Close diameter and wall thickness tolerances
  • Excellent surface condition
  • Better microstructure
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Main use

Stainless steel

  • Chemical industry
  • Food
  • Pure gas applications

Antifriction bearing steel

  • Antifriction bearings


Ferritic steels

  • Boiler construction
  • Chemical engineering

Low-alloy steels

  • Boiler construction
  • Drilling and boring
  • High pressure tubes
  • Automotive engineering

Inconel®, Incoloy®

  • Heat exchangers for power plant
  • Chemical engineering


  • Plumbing tubes
  • Air-conditioning systems
  • Refrigerators
  • Heat exchangers

Cooper-nickel , brass

  • Seawater desalination plant
  • Marine engineering

Titanium alloys

  • Aeronautical engineering 
  • Medicine


  • Nuclear power plants


Cold pilger mill equipment

SMS group cold pilger mills achieve large reductions in both diameter and wall thickness. Simultaneously, they significantly reduce eccentricity due to the homogenization of the material flow during forming. This creates the required microstructures in the material.

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Cold pilgering eliminates the need for additional time and cost-intensive process steps such as cleaning, annealing, pickling, cutting, and straightening. During cold pilgering, a large number of forming steps improve roundness, stress homo- geneity, and surface roughness of the tubes. No other cold forming process for tubes offers you so many advantages.

Tool machining image

Tools perfectly tailored to the rolling process are essential for producing top-quality tubes. That's why our product portfolio also features grinding machines for dressing dies and mandrels.

These are specially designed for machining tools used in cold pilger mills. So you get precisely ground dies and mandrels that ensure consistently high productivity and tube quality.

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Tube cleaning, sawing, diameter and wall thickness measuring

Apart from machines and plants for tube production and tool dressing, we also supply a range of facilities downstream of cold pilgering.

  • Tube inside /outside cleaning facility
  • Travelling saw on the run-out side of the cold pilger mill
  • Diameter and wall thickness measurement for process monitoring and quality assurance

Electrical and automation systems

Integration of the latest technologies and automation processes

There is a huge demand for the automation of complete cold pilger mills and integrated individual machines. That’s another SMS group specialty.

So, whatever you want, from individual sensors, through drive and control technology, right up to planning and implementation of computer-aided information and control systems: SMS group supplies complete solutions. 

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Emergency Support

Remote service

Remote access to the machine control system for fault analysis is possible only after authentication by the customer. Direct analysis and evaluation of the operating parameters are performed online by the SMS Service employees. They can easily identify defects and malfunctions and initiate measures for fault elimination. Remote access also allows the system software to be updated. Naturally, the installation of the necessary hardware and software for the remote access is already included in the remote service.

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Our services

  • Installation of software and hardware
  • Identification of faults, defects and malfunctions 
  • System update and fault elimination per remote access
  • In case of plant failure competent assistance by experts

Your benefits

  • Shorter reaction times
  • Rapid identification of necessary maintenance and repair measures
  • Reduction of maintenance costs

Spare parts pool

Flexibility and guaranteed availability – with less capital tie-up

You can draw on our spare parts pool for cold pilger mills whenever you want exclusive access to a customized range of OEM spare parts. Up-front, we agree fixed prices with you and guarantee immediate availability. That means lower operating costs and lower capital tie-up without compromising machine on machine availability or flexibility.

Your benefits at a glance:

  • Guaranteed availability 
  • Short delivery times
  • Better planning security 
  • Reduced capital tie-up
  • Lower warehousing costs 
  • Less maintenance work
  • Guaranteed OEM quality
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Lower costs, less capital tie-up image

Lower costs, less capital tie-up

We charge a reasonable fee for access to our spare parts pool. As a result, you not only obtain high flexibility and parts availability, but also make substantial savings. What's more, you no longer have to dispose of outdated or old parts - saving even more money.

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Fixed prices and delivery times

Whether large, machine-specific components or standard products - we keep a backup inventory of the components you specify. That means you can rely on rapid delivery of all the products you require. It also makes purchasing spare parts easier. We regularly get together with you to agree on terms and conditions.

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Less maintenance work

Both procurement and stocking are covered by our spare parts pool. This results in leaner processes for you. Why? Because our staff take care of warehousing - including administrative work such as inventory management and ensuring the right storage conditions.


SMSgroup Wilms, Michael

Michael Wilms

SMS group GmbH
Head of Seamless Tube Plants
Ohlerkirchweg 66
41069 Mönchengladbach

Phone : +49 2161 350 1842


Learn about our plant technology covering the entire process chain for the production of high-quality metals.