SKF
SNLN 30 Series Housings
The SKF SNLN 30 series are heavy-duty split plummer block housings designed for large spherical roller bearings (typically above 300 mm bore) used in the heaviest industrial applications: mine hoists, raw mill trunnions, ship propeller shafts, and large ventilation fans. The housing base and cap are robust grey iron or spheroidal graphite iron castings, with optional oil lubrication sumps and cooling coils to manage heat from continuous high-load operation. The SNLN 30 series accommodates a full range of sealing options, including taconite seals for extreme dust. The design features generous grease cavities and oil flow paths for effective lubrication under low-speed, high-load regimes. These housings are engineered with a substantial safety margin on static load capacity, providing the rigidity and durability essential for mission-critical rotating equipment.
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Extreme Load Capability
Supports multi-megawatt drivetrains with large static safety factors.
Oil Lubrication Ready
Integrated sump and optional cooling coils for heat dissipation.
Taconite Seal Compatibility
Protects against the harshest mining and processing dust.
Spheroidal Graphite Iron Option
Enhanced strength and toughness for shock loads.
Modular Accessories
End covers, stabilising rings, and condition monitoring ports.
Designed for Long Service Life
Conservative design limits minimise stress and fatigue.
Solving Heat Management in Large Bearing Housings
In ball mill trunnions or large ID fans, frictional heat buildup can degrade oil and cause bearing smearing. SNLN 30 housings with cooling coils circulate water to maintain safe oil temperature, preserving film thickness and extending bearing life indefinitely under constant thermal load.
Taconite Sealing for Mining Applications
The taconite seal combines multiple labyrinth stages, a grease-filled cavity, and a floating elastomer ring. This configuration has proven effective in preventing iron ore dust ingress in crusher and conveyor drive bearings where standard seals fail, dramatically reducing premature failures.