Material information

P20, P22 and P23... low-maintenance standard solutions

P20, P22 and P23 are leaded standard sliding materials with a high performance. They are designed for low-maintenance grease or liquid-lubricated applications. The standard P20 version features oil distributing pockets according to DIN ISO 3547 in the sliding surface and a pre-finished wall thickness. The P22 versions (smooth sliding surface, suitable for reworking) and P23 (smooth sliding surface, ready to install) are also available on request.

Material production

The bronze compound layer is sintered onto a prepared steel surface (band) in a continuous sintering process in such a way as to produce a pore volume of around 50 % at a layer thickness of approx. 0.3 mm.

Next, the sliding layer is applied in powder form and rolled into the cavities in the compound layer under a high temperature.
The result is a sliding layer thickness of approx. 0.08 mm or approx. 0.2 mm above the compound layer, depending on the intended purpose.
At the same time, the oil distributing pockets are produced, if required. A further rolling calibration process then adjusts the necessary thickness tolerance of the composite material.

Important!

The materials P20, P22 and P23 contain lead and must therefore not be used in the food sector!

Plain bearing production

Sliding elements in a great variety of designs are produced from the composite material in cutting, stamping and shaping processes.

Standard designs are:

  • Cylindrical bushes
  • Thrust washers
  • Strips

In a final step, plain bearings manufactured from P20, P22 or P23 undergo corrosion protection treatment on the bearing back, face reliefs and striking faces.

Standard version: Tin
layer thickness: approx. 0.002 mm

Note: Tin is used as temporary corrosion protection and an assembly aid

Characteristics

  • Service life lubrication possible
  • Low wear
  • Low sensitivity to edge load
  • Good damping behaviour
  • Insensitive to impact load
  • Good chemical resistance

Preferred areas of application

  • Low-maintenance operation under lubrication conditions
  • Rotating or oscillating movements up to a velocity of 3 m/s
  • Linear movements up to 6 m/s
  • Temperature range -40 °C to 110 °C

Material composition

Layer systems P20, P22, P23

1 Sliding layer
PVDF matrix with bulking agents¹)
Layer thickness [mm]: 0.08 - 0.20

2 Intermediate layer
Tin-bronze
Layer thickness [mm]: 0.20 - 0.35
Pore volume [%]: Approx. 50

3 Bearing back
Steel
Steel thickness [mm]: Variable
Steel hardness [HB]: 100 – 180

1) The pores of the sliding layer are also filled with this lubricant mass.

Chemical composition

Sliding layer

Components% weight
PVDF51
PTFE8
Pb41

Interlayer

Components% weight
Sn9 to 11
CuRest

Bearing back

MaterialMaterial information
SteelDC04
DIN EN 10130
DIN EN 10139

Material characteristics

Characteristic values, load limitDesignationUnitValue
Permitted pv valuepvzul.MPa·m/s3
Permitted specific bearing load
  • Static
pvzul.MPa250
  • Concentrated load, circumferential load at sliding speed ≤0,021 m/s
pvzul.MPa140
  • Concentrated load, circumferential load at sliding speed ≤0,043 m/s
pvzul.MPa70
  • Concentrated load, circumferential load, increasing at sliding speed ≤0,086 m/s
pvzul.MPa35
Permitted sliding speed
  • grease-lubricated, rotating, oscillating
vzul.m/s3
  • grease-lubricated, linear
vzul.m/s6
  • hydrodynamically operated
vzul.m/s6
Permitted temperatureTzul.°C-40 to +110
Coefficient of thermal expansion
  • Steel back
αStK-111*10-6
Coefficient of thermal conductivity
  • Steel back
λStW(mK)-1< 40

Models and tables of dimensions

Model range P20, P22 and P23

  • Bushes PAP.. KS Permaglide P20
    DescriptionDiDoB
    PAP 0808 P208108
    PAP 0810 P2081010
    PAP 0812 P2081012
    PAP 10050 P2010010550
    PAP 10060 P2010010560
    PAP 1008 P2010128
    PAP 1010 P20101210
    PAP 1015 P20101215
    PAP 1210 P20121410
    PAP 1212 P20121412
    PAP 1215 P20121415
    PAP 1220 P20121420
    PAP 1420 P20141620
    PAP 1510 P20151710
    PAP 1515 P20151715
    PAP 1525 P20151725
    PAP 1612 P20161812
    PAP 1615 P20161815
    PAP 1620 P20161820
    PAP 1815 P20182015
    PAP 1820 P20182020
    PAP 2015 P20202315
    PAP 2020 P20202320
    PAP 2030 P20202330
    PAP 2220 P20222520
    PAP 2515 P20252815
    PAP 2520 P20252820
    PAP 2525 P20252825
    PAP 2530 P20252830
    PAP 2830 P20283230
    PAP 3020 P20303420
    PAP 3025 P20303425
    PAP 3030 P20303430
    PAP 3040 P20303440
    PAP 3230 P20323630
    PAP 3520 P20353920
    PAP 3530 P20353930
    PAP 3550 P20353950
    PAP 4020 P20404420
    PAP 4030 P20404430
    PAP 4040 P20404440
    PAP 4050 P20404450
    PAP 4540 P20455040
    PAP 4550 P20455050
    PAP 5025 P20505525
    PAP 5040 P20505540
    PAP 5060 P20505560
    PAP 5540 P20556040
    PAP 6030 P20606530
    PAP 6040 P20606540
    PAP 6060 P20606560
    PAP 6070 P20606570
    PAP 7040 P20707540
    PAP 7050 P20707550
    PAP 7070 P20707570
    PAP 7540 P20758040
    PAP 7580 P20758080
    PAP 8040 P20808540
    PAP 8055 P20808555
    PAP 8060 P20808560
    PAP 8080 P20808580
    PAP 9060 P20909560
  • Thrust washers PAW.. KS Permaglide P20
    DescriptionDiDoB
    PAW 20 P2020361,5
    PAW 22 P2022381,5
    PAW 52 P2052782,0
    PAW 12 P2012241,5
    PAW 14 P2014261,5
    PAW 42 P2042661,5
    PAW 26 P2026441,5
    PAW 18 P2018321,5
    PAW 32 P2032541,5
    PAW 28 P2028481,5
    PAW 38 P2038621,5
    PAW 48 P2048742,0
  • Strips PAS.. KS Permaglide P20
    DescriptionLBS3
    PAS 15180 P205001801,48
    PAS 10180 P205001800,99
    PAS 25180 P205001802,46
    PAS 20180 P205001801,97

     

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