Bearing metal alloys made of tin and lead for demanding applications

Bearing metal - also known as white metal or plain bearing alloy - is a specially developed white metal alloy consisting of tin, antimony, copper, lead and occasionally silver, nickel and zinc. They are used specifically for the production of radial/axial plain bearings, segment bearings, bearing bushes, connecting rod bearings and planetary bolts. Our most important customers for white metals in the bearing metal groups include industrial customers who use the bearing metal mixtures supplied to manufacture plain bearings for gearboxes, wind turbines, compressors, electrical machines and other industrial equipment.

Typical features:

  • Suitable for both low and high speeds

  • very good emergency running properties (low static friction & good impact resistance)

  • suitable for spherical casting as well as die casting and centrifugal casting

Make a request

Standard and high-performance alloys

Lead-containing and lead-free

Whether established standard metal or modern, environmentally friendly variants - we offer suitable alloys for your technical requirements.

 

Standard alloy

Lead-free high tin alloy

Legierung

WM80 

(Sn80Sb12Cu6Pb2)

WM89 

(Sn89Sb7,5Cu3,5)

Therm81AG 

(Sn81,3Sb12Cu6Zn0,6Ag0,1)

Zusammensetzung80% tin, 11-13% antimony, ~6% copper, <3% lead89% tin, 7.5% antimony, 3.5% copper~81% tin, 12% antimony, 6% copper, 0.6% zinc, 0.1% silver
Einsatzgebiete

Turbines

Electric machines

compressors

Rolling mill bearings

Gas turbines

Gearboxes

Turbomachines

compressors

Generator bearings

Eigenschaften

Suitable for slow and high sliding speeds

Medium static load capacity

low sensitivity to edge pressure

Suitable for medium and high sliding speeds

Medium static load capacity

low sensitivity to edge pressure

good resistance to vibrations and alternating bending stresses

Highest static load capacity

high resistance to dynamic stresses

good dimensional stability



Plain bearing alloys for numerous key industries

Bearing metals are used wherever machine components need to be rotatably or pivotably mounted and at the same time reliably protected against wear, friction and failure. Their combination of sliding properties, wear resistance and thermal load capacity makes them indispensable for numerous industrial applications.

The main sectors include:

In mechanical engineering and drive technology, plain bearing alloys are used in particular in industrial gearboxes, presses, rolling mills and compressors. Here it is important to have bearings that can withstand permanent loads while minimizing friction loss - especially in continuous operation or under changing load conditions.

In energy and turbine construction, for example in wind power, hydroelectric or gas power plants, bearing metals ensure the reliable functioning of rotors, axial and radial bearings as well as auxiliary units. In wind energy in particular, they are an essential component of the main bearing in the nacelle - a highly stressed area in which temperature, pressure and environmental influences interact.

 

The aerospace industry uses bearing metals in turbochargers, auxiliary power units (APU) and actuators. Particularly lightweight, heat-resistant and at the same time highly resilient materials are required here - an ideal field of application for high-purity, tin-based bearing metals with a finely tuned alloy structure.

Plain bearing alloys also play a key role in the field of transportation and railroad technology - for example in traction motors, locomotive bearings, swivel units and brake mechanics. The materials must reliably compensate for extreme load changes, vibrations and high speeds.

In the construction industry and in heavy-duty technology, bearing metals are used for rotating bearings in slewing cranes, hydraulic systems, cable winches or lifting equipment. Variants with high compressive strength, good emergency running properties and stable casting behavior are particularly in demand here - even with large component cross-sections.

Finally, in pump, valve and fitting technology, bearing metals protect moving components in chemical plants, refineries, energy centers or cooling water pumps. Here, media-resistant, low-wear alloys are required that function reliably even when there is a lack of lubricant or changing temperatures.

Make a request

The right format for your process

We supply our stock metals in various formats so that you can integrate them efficiently into your production process. Whether ingots with or without suspension for easy handling, bars and rods for precise dosing - each format is designed to shorten set-up times, minimize material losses and ensure consistently high melting and casting quality. Together we will find the optimum delivery form for your application.

 

Production in Germany

Our production takes place entirely at our site in Halsbrücke - with a dedicated team that produces quality with responsibility.

Consistent quality & traceability

Each batch is analyzed and documented in our own laboratory - for consistent quality and complete traceability.

Practiced circular economy & raw material recycling

We close material cycles and return valuable metals to production in a resource-saving and sustainable way.

Get your offer

Fast, transparent and uncomplicated - request your individual offer now!


Your contact person
Contact information

According to the Chemicals Prohibition Ordinance (§ 5 ChemVerbotsV), lead-containing substances may only be sold to commercial customers with the appropriate expertise. Sale to private individuals is prohibited by law. We therefore reserve the right to request appropriate proof when placing orders.

Frequently asked questions (FAQ)

These terms are often used interchangeably. They refer to tin- or lead-based alloys that have been specially developed for the manufacture of plain bearings.

Bearing metal is the generic term for such alloys.

Bearing alloy describes the technical area of application.

White metal refers to the silvery, shiny appearance of these non-ferrous metal mixtures.

What all variants have in common is that they offer optimum sliding properties, high compressive strength and good emergency running properties.

 

Lead-free bearing metals are used wherever legal requirements - such as RoHS, REACH or environmental regulations - restrict the use of materials containing lead.
Typical areas of application:

  • Wind turbines

  • Near food or drinking water systems

  • Export-oriented production with EU directives

Lead-free alloys such as WM89 now offer comparable performance values to classic lead-containing variants - often with improved environmental compatibility.

 

Depending on requirements, we supply stock metals in various formats:

  • Bars with and without suspension

  • Bars type 3K & 4K

  • bars