Application

Application of KS P210 – KS P213

Plain bearings made of KS P210 – KS P213 are particularly suited for use in tribological systems with minimum lubrication or for hydrodynamic systems with high rates of mixed friction such as, for example, high-pressure injection pumps, hydro-engines or high-performance gear units. They excel by extremely low wear even at high temperatures and very good chemical resistance. Plain bearings made with a machining allowance can be reworked by chipping. This way, any misalignments can be equaled out and closer bearing plays adjusted.

Description

Brief description of the sliding material

The material family KS P210 to KS P213 encompasses different varieties in terms of sliding layer thickness and profile design of the sliding surface.

 Layer above bronze (mm)Ready for installationMachining allowanceLube pockets1)
KS P2100,05 – 0,20 
KS P2110,15 – 0,20 
KS P2120,15 – 0,50  
KS P2130,05 – 0,20  

1) Lubrication pockets acc. to DIN ISO 3547, sampling at request

The base material consists of a steel back, a bronze bonding layer and a PEEK sliding layer with purpose-adapted fillers.

Plain bearings made of KS P210 – KS P213 have been designed for application in tribological systems with initial lubrication or for hydrodynamic systems with elevated rates of mixed friction at operating temperatures up to 200 °C.

  • Material characteristics
    Characteristics, limit loadsUnitKS P210 - P213

    Permissible specific bearing load p

    • Static
    • Very low sliding speed
    • Oscillating, vibrating
     

     

    N/mm²
    N/mm²
    N/mm²

     

    250
    180
    90

    Permissible sliding speed v

     

     

     
    • With mixed friction
    • Hydrodynamic
     

    m/s
    m/s

    3
    10

    Permissible temperature range

    °C

    -60 to +200

    Coefficient of thermal expansion

    k-1

    49 · 10-6*

    Thermal conductivityW · (m·k)-18 – 10*

    *)These parameters were measured at a sliding layer thickness of 0.15 mm. Different values may be obtained when changing the sliding layer thickness

  • Chemical resistance
     

    Engine oil

    Damper oil

    Transmission oil

    Hydraulic oil

    Temperature (°C)

    150

    140

    150

    125

    Duration (h)

    528

    528

    528

    528

    Thickness increase (μm)

    0-3

    0-5

    0-2

    0-4

    Damage through chem. attack

    none

    none

    none

    none

     

Bearing structure

Bearing structure of KS P210 - P213

The steel carrier material used is typically of grade C22. The steel back hardness is in the range of 100 HB – 180 HB. The bonding layer is porous, sintered CuSn10 bronze with a pore volume of 45 – 60 % and a layer thickness of 0.2 – 0.35 mm. The sliding surface is based on a filler-reinforced PEEK layer.

1 PEEK sliding layer
2 Intermediate layer
3 Steel back

Chemical composition of the sliding layer

mass-%

PEEK

60 %

C fibers

10 %

ZnS

10 %

TiO2

10 %

Graphite

10 %

Manufacture

Manufacture of the sliding material

In a granulating and extrusion process, first a PEEK-based, filler-reinforced plastic sheet is produced. In a continuous sintering process, the bronze bonding layer is applied to the steel strip in such a way that a pore volume of 45 – 60 % is obtained. Next, the plastics sheet and the steel-bronze strip are joined by hot pressing and the exact material thickness is adjusted. The quality-determining parameters in this process are temperature, press power and pressing time.

Plain bearing manufacture

Sliding elements of the most varied shapes are produced from this composite by cutting, punching and forming. Flange bushings composed of wrapped bushes and punched thrust washers are joined by applying a newly developed laser welding method and boast a series of benefits compared to the standard forming process. Depending on each specific case of application, at the end of the process a finetuned corrosion protection treatment is performed.

Laser-welded flange bushing

Benefits of laser-welded flange bushings

  • Possibility to combine discretional flange and bush diameters
  • Closed flange-thrust contact area
  • Accurate wall-thickness distribution at the flange-thrust contact surface
  • Bush (radial part) and flange/thrust washer (axial part) may consist of different materials and also exhibit different material thicknesses

Quality

The entire production process is monitored and controlled by a close-meshed net of quality assurance measures.

Tribological performance

In order to demonstrate the performance capability of this new development, various tests were carried through. The results shown on the left side attest to excellent performance, also in comparison with competing design solutions. What is especially noteworthy is the high wear resistance for pump bearings in start-stop operation.

 

Download

Information as PDF

Would you like further information?
Get in touch.

Use of cookies and data protection

Motorservice Group uses cookies saved to your device in order to optimize and continuously improve its websites, as well as for statistical purposes. Further information on our use of cookies can be found here, together with our publication details and data protection notice.

By clicking on “OK” you confirm that you have taken note of the information on cookies, the data protection declaration and the publication details. You can also change your cookie settings for this website at any time.

Privacy settings

We place great importance on transparent information relating to all aspects of data protection. Our website contains detailed information on the settings you can select and what effect these settings have. You can change your selected settings at any time. Regardless of the selection you choose, we will not draw any conclusions regarding you as a person (except where you have explicitly entered your details). For information on deleting the cookies, please see the help function in your browser. You can find out more in the data protection declaration.

Change your privacy settings by clicking on the corresponding buttons

Necessary

Cookies essential for the system ensure that the website works correctly. Without these cookies, malfunctions or error messages may occur.

This website will:

  • Store cookies required by the system
  • Store the settings you make on this website

This site wil never do the following without your agreement:

  • Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.
  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Convenience

These cookies make the website easier to use and save settings, for example, so that you do not have to repeat them every time you visit the site.

This website will:

  • Store cookies required by the system
  • Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.

This site wil never do the following without your agreement:

  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Statistics

Statistics cookies enable us to evaluate the usage behaviour on the website anonymously – without enabling any conclusions to be drawn about you as a person. This enables us to measure the performance of the website and to improve it continuously to offer a better user experience.

This website will:

  • Store cookies required by the system
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)
  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.

This site wil never do the following without your agreement:

  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Of course, we will always respect the do-not-track (DNT) setting in your browser. In this case, no tracking cookies are set and no tracking functions are loaded.