SOFN Series
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SOFN Series
SOFN Series: Oil Lubricated Large Bearing Housings

SOFN Series

The MASTA SOFN Series represents a specialized range of plummer blocks specifically designed for oil lubrication. These housings are engineered for high-performance applications where grease is insufficient due to high operating speeds or extreme temperatures. The SOFN series is widely utilized in critical equipment like industrial fans, blowers, and high-speed emergency machinery where continuous, reliable lubrication is a necessity.

Size Range
As per requirement
Surface Finish
Standard / Customized
Application
Industrial Use
Country of Origin
India
Drop-in SOFN Series replacement
Heavy-duty rated
4 Seal options
Why Choose SOFN Series

Key Features & Improvements

Engineering advancements that make the SOFN Series the smarter, longer-lasting choice.

  • Optimized Oil Lubrication System: Unlike standard grease-filled housings, the SOFN series is designed with an internal oil delivery system. It features a specialized oil pick-up ring that ensures a constant and uniform supply of oil to the bearing, even at high startup speeds.
  • Superior Sealing Technology: To prevent oil leakage, these housings are equipped with advanced non-contact labyrinth seals. These seals are highly effective at retaining oil within the housing while simultaneously preventing external dust and moisture from contaminating the oil sumps.
  • Enhanced Heat Management: By utilizing oil as the primary lubricant, the SOFN series naturally dissipates heat more effectively than grease. This makes it the ideal choice for high-temperature environments where bearing longevity depends on maintaining a stable operating temperature.
  • Integrated Oil Level Monitoring: To simplify maintenance for plant operators, the SOFN series includes a built-in oil level gauge. This allows for quick visual inspections to ensure the lubricant is at the correct level, preventing "dry running" and bearing failure.
  • Robust Four-Bolt Base: Designed for stability in high-speed rotating applications, the SOFN housing features a solid four-bolt base. This design ensures secure mounting and minimizes the risk of vibration-induced wear on the foundation.
Specifications

Technical Summary

Full dimensional and performance data for the SOFN Series.

Feature Detail
Series SOFN Series (Oil Lubricated Type)
Lubrication Oil Sump (using an oil pick-up ring)
Sealing High-performance Labyrinth Seals
Shaft Sizes Typically, 75 mm to 160 mm and above
Best For High-speed industrial fans, blowers, exhausters, and high-temp machinery

Comparison: SD vs. SOFN Series

Feature SD Series (Heavy-Duty Large) SOFN Series (Oil Lubricated)
Primary Lubricant Grease Oil
Key Advantage Maximum load capacity for huge shafts High-speed operation and heat dissipation
Lubrication Method Grease Nipples Oil Pick-up Ring / Sump
Monitoring Visual inspection Oil Level Gauge included
Typical Application Mining, Crushers, Steel Mills Fans, Blowers, and High-speed rotating units
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