SSH EN 4540:2011

Seritë e hapësirës ajrore - Kushineta, të thjeshta sferike, prej çeliku të qëndrueshëm ndaj gërryerjes me këmishë vetë-vajosëse me ngarkesë të rritur nën lëkundje të vogla - Detaj teknik

Aerospace series - Bearings, spherical plain, in corrosion resisting steel with self-lubricating liner elevated load under low oscillations - Technical specification

Scope

This European 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 prEN 4538-1, prEN 4538-2, prEN 4539-1 and prEN 4539-2 are for actuator applications and for use in the temperature range - 54 °C to 163 °C and for EN 4538-003 and EN 4539-003 for use in the temperature range - 54 °C to 120 °C.
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.