Function and use of marine greases
Marine greases lubricate mechanical connections, bearings and moving elements that are exposed to high loads, moisture and salty environments. They minimize friction, reduce wear and extend the service life of components. At the same time, they help to protect against corrosion and ensure reliable operation.
Properties of marine greases
Marine greases should have the following properties:
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Water resistance: Protection against washing out through contact with water
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High pressure resistance: Reduces material fatigue under load
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Corrosion protection: Protects surfaces in salty environments
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Thermal stability: Maintains the lubricating effect over temperature ranges
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Adhesion: Reliable lubricating film even with vibrations
These features ensure reliable lubrication and component protection in boat operation.
Applications in boat and drive systems
Marine greases are used on:
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Bearing points - Ball, roller and swivel bearings
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Shafts and shaft couplings - Reduction of friction and play
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Steering and gearshift joints - permanent mobility
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Hinges and pin connections - protection against corrosion and freedom from play
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Deck and superstructure technology - moving connection points
Correct lubrication reduces mechanical stress and increases service life.
Selection criteria: Compressive strength, water resistance & temperature
The following should be taken into account when selecting a marine grease:
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Compressive strength (EP properties): for heavily loaded bearings
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Water resistance: especially for outdoor and underwater parts
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Temperature range: suitable for the environment and operating conditions
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Compatibility with materials used: e.g. metals, plastics
Only suitable greases guarantee long-lasting function and protection.
Application & application methods
The following applies for effective lubrication:
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Apply grease evenly to the bearing or connection
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Plan grease replenishment at operating intervals
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Clean lubrication points before applying new grease
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Adjust quantity to requirements, do not overgrease
Correct application technique reduces friction and heat generation.
Maintenance and relubrication
Regular inspection of lubrication points is important:
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Visual inspection for wear, rust or grease contamination
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Relubrication at higher loads or at the start of the season
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Replace old grease to remove water/particles
Scheduled maintenance protects moving components in the long term.
Typical problems with unsuitable grease
If the wrong or unsuitable grease is used, this can lead to
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Increased friction and wear
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Bearing damage under load
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Water or salt ingress on moving parts
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Increased noise development
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Reduced service life of connecting elements
can lead to A suitable selection prevents these problems in advance.
