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P4021Z Bronze-graphite Oil Sintered Plain Bush Sliding Bearing

BS 5600-5.1:1988
ISO 5755-1:1987
BS EN ISO 5755:2022
P4021Z
Product description: The P4021Z is a bronze-graphite oil-impregnated sintered plain bush sliding bearing compliant with BS 5600-5.1:1988, ISO 5755-1:1987, and BS EN ISO 5755:2022 standards. Its self-lubricating design ens
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P4021Z Bronze with graphite Sintered Bearing Material

Bronze-graphite sintered bearing material, oil-impregnated per BS 5600-5.1:1988 / ISO 5755-1:1987. Graphite provides additional solid lubrication for improved self-lubricating performance in boundary lubrication conditions.

Chemical Composition (BS 5600-5.1:1988)

Element	Content	Unit
C total	0.5–2.0	%
Cu	Balance
Sn	9–11	%
Other elements	—	≤2

Mechanical & Physical Properties

Property	Unit	Value
Open porosity (P)	%	≥27
Radial crush strength (K)	N/mm²	≥90
Density (—)	g/cm³	5.9
Relative density (—)	%	70
Coefficient of linear expansion (μz)	10⁻⁶K⁻¹	18

The Z suffix indicates the material has been impregnated with liquid lubricant per ISO 5755. The liquid lubricant content shall be not less than 90% of the measured open porosity. Open porosity and radial crush strength are mandatory values as specified in BS 5600-5.1:1988 / ISO 5755-1:1987 / BS EN ISO 5755:2022.

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