Aerospace series Bearings@ spherical plain@ in corrosion resisting steel with self-lubricating liner Elevated load under low oscillations Technical specification (Edition P 2)
This standard specifies the required characteristics@ inspection and test methods@ qualification and acceptance conditions for spherical plain bearings in corrosion resisting steel@ self aligning with self-lubricating liner designed to withstand (under load) slight swivelling and slow rotations only. This standard applies whenever referenced. These bearings EN 4538-1@ EN 4538-2@ EN 4539-1 and EN 4539-2 are for actuator applications and for use in the temperature range ?C 54 ??to 163 ??and for EN 4538-003 and EN 4539-003 for use in the temperature range ?C 54 ??to 120 ?? The liner may be of a fabric or composite material bonded to the inside diameter of the outer ring or in a composite material moulded into a pre-formed cavity between the inner and outer rings. The duty cycle (Annex E@ normative) has been established on the basis of a civil aircraft aileron surface application.