RENK marine shaft bearings, RADILUS® LR type and SN type

RENK marine shaft bearings in the RADILUS® range of type LR and SN are the proven standard for conventional marine propulsion systems with shaft lines. Both types are self-lubricating and can be configured as supporting bearings or journal bearings ‒ available with a lower shell only ‒ depending on the requirements. Because it is installed in the housing with a ball joint, the bearing shell adapts to the position of the shaft during assembly. Damaging pressure at the edges is avoided, and the assembly and alignment of the shaft train are simplified significantly.
The frictional heat is dissipated by means of natural cooling; i.e., through radiation and convection via the housing. If necessary, seawater resistant cooling systems can be built into the lubricant sump or the bearing can be connected to an external lubrication system.
The SN type is distinguished by a higher degree of radial rigidity of the bearing housing in contrast to the LR type. The SN type therefore has a proven track record with large sizes for special applications in particular – such as ice-going ships, for example.


RENK marine shaft bearings, RADILUS® LR type and SN type

Bearing design tailored especially to shipbuilding applications

Self-lubricating operation despite highly inclined positions

Overhaul and maintenance possible for installed shaft

Noise and vibrations during operation are generally low

Efficient condition monitoring thanks to easy evaluation of the bearing temperature

Available as a package with numerous combination options

Technical data

Shaft diameter:
110 to 850 mm
Pedestal bearing
Self-lubricating or external lubrication
Cooling system:
Natural cooling, water cooling, or external cooling
Hydrostatic system, lubrication system


Other products

Thrust bearings ‒ D type

RENK thrust bearings in the D range are suitable for absorbing high axial and radial forces, include shock type forces, regardless of the rotation and load direction.

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Pedestal bearing ‒ SC type

RENK pedestal bearings in the SC range are optimized for stationary use as radial bearings in land applications and can also absorb moderate axial loads. They are primarily used in electrical machines.

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Engine bearing ‒ SM type

RENK flange-mounted bearings in the SM series were specially developed for use as an engine bearing in naval applications. Designed for steeply inclined positions, the construction enables self-lubricating and therefore extremely quiet operation.

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Rolling mill bearing – WG type

RENK rolling mill bearings in the WG range are designed for extreme axial strain. They were developed primarily for the mounting of rolling mill drive units and large electrical machines in which high axial loads occur at low speeds and a high level of protection against damage must be ensured at extreme loads.

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Relevant industries


Shipping industry

Gear units, slide bearings, and couplings for the shipping industry. Make the most of reliable, low-emission drive technology from RENK.

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Power generation


Enhanced productivity for your hydro power station

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