„creating a world of bearings solutions“

COM-KU®/D

Fibre reinforced plastic composite sliding bearing

Technical details COM-KU®/D

  • maintenance-free *
  • Interchangeable with lubricated bushings
  • Suitable for impact load as well as edge pressures
  • good damping properties
  • special dimensions possible
com-ku-d_kdz402

Maintenance-free: the COM-KU®/D fibre-reinforced plastic sliding bearing

With the COM-KU®/D, we offers you a self-lubricating and maintenance-free plastic sliding bearing, which brings together the greatest advantages of this material: good sliding qualities, chemical resistance and a long service life. This means that it is suited to a range of applications – from machinery, equipment and drive construction to construction and agricultural machinery, shipbuilding and use in off-shore facilities. Read here about the success of this product.

Our plastic sliding bearing COM-KU®/D is manufactured from fibre-reinforced compound plastic using winding technology. Its material characteristics are summarised below:

  • Compressive strength: between 300 and 350 Newtons per square millimetre (N/mm²)
  • Shear strength: between 95 and 105 N/mm²
  • Compressive modulus of elasticity: between 1600 and 2000 N/mm²
  • Density: between 1.25 and 1.35 x 103 Kilogram per cubic metre
  • Coefficient of friction: between 0.04 and 0.12 µ.

The sliding bearing is suited for a temperature range between -150ºC and +130ºC and has very good sliding characteristics at low sliding speeds. It resists high to very high loads, including impact loads and edge pressing. It also has good attenuation properties, which has a positive effect on its resistance to impacts.

With plastic sliding bearings think about the extended coefficient of expansion

For a shaft material in COM-KU®/D, steel should be used with a Brinell hardness of more than 200 HB and a roughness depth of less than 6.3 Rz. The tolerance of the shaft varies according to the application, that of the bushing after installation according to its diameter. Please note as a matter of principle that installation dimensions and tolerances should be designed to be “plastic suitable” for plastic sliding bearings. Above all, an enhanced expansion coefficient should be taken into account relative to metal sliding bearings, from which larger tolerance ranges and bearing clearance fits can result. After installation, the COM-KU®/D plastic sliding bearing operates completely maintenance-free. Replacement is easily possible even with lubricated bearings. This means that our product not only saves on costs, but also guarantees operation without any impairment in its area of application. If you have further questions on plastic sliding bearings and other products, we look forward to your message via our contact form or your call!

Properties

  • Suitable for high load capacity, very good at low sliding speeds, good chemical resistance, long life-span, good damping features.

Materials

  • Compound plastic with different sliding additives, made of winding technique*

Tolerance details

  • Housing Ø H7
  • Bushing inner-Ø after mounting Depends on diameter
  • Shaft tolerance Depending on application
  • Please note, that fitting tolerances have to be “plastic-tailored” considering the larger expansion coefficient compared to metal sliding bearings. Therefore bigger fitting tolerances occur (to be advised by LHG)

Shaft material

  • Steel >200HB dressed to size, surface roughness ≤ Rz 6.3

Mounting advise

  • Housing: Mounting bevel, min. 1,5 mm x 15-45°
  • Shaft: Mounting bevel, 5 mm x 15°, edges rounded
  • Force fitting mandrel: For thin walls advisable

Maintenance

  • No maintenance necessary. COM-KU®/D is a maintenance-free plastic sliding bearing. If non-stainless shafts are used, lubrication against shaft corrosion necessary!

Range of application

  • Machine and apparate construction, construction equipment, gear manufacturing, agricultural machinery if impact load as well as edge pressures occure, shipbuilding, offshore construction

Caption

*) Only the bushing with its wear-resistant material is maintenance-free. Please consider the parts surrounding the bushing, such as housing and shaft, whether they may require anti-corrosion lubrication!

On request further materials are available for higher demands, e.g. for higher temperature ranges.

The above stated material properties are valid for optimal operating conditions. Through changes of the application conditions e.g. higher sliding speed or strain, these values are subject to change.