Overview
The SKF SAF-520 is a split pillow block bearing housing engineered for industrial machinery and power transmission systems. This SAF-520 bearing housing features cast iron construction with a two-bolt base mount, designed to securely hold and support mounted bearings in demanding applications. The split design simplifies installation and maintenance while maintaining structural rigidity required for continuous operation.
Key Features
- Split pillow block design for straightforward installation and service access
- 3-7/16″ (3.4375″) bore diameter accommodates standard 20 mm shaft bearings
- Two-bolt base mounting with 13.125″ bolt center-to-center spacing
- Cast iron construction meets ASTM A48 Grade 35 specification for durability
- Includes (2) LOR 102 aluminum labyrinth triple-seal rings for contamination protection
- Uncoated finish suitable for both indoor and protected outdoor environments
Technical Specifications
- Bore Diameter: 3-7/16″ (3.4375″)
- Overall Length: 15.25″
- Overall Height: 8.5″
- Overall Width: 6.125″
- Base Width: 4-3/8″
- Base to Bore Centerline: 4.5″
- Bolt Center-to-Center Length: 13.125″
- Weight: 46.74 lbs
- Housing Material: Cast Iron
- Housing Construction: Split
- Mounting Type: Two-Bolt Base
- Seal Rings: (2) LOR 102 Aluminum Labyrinth Triple-Seal Rings
- Standard: ASTM A48 Grade 35
- Finish: Uncoated
Typical Applications
The SAF-520 split pillow block housing is widely used in:
- Fan and blower assemblies requiring reliable bearing support
- Conveyor and material handling systems
- Pump and compressor drive systems
- Mining and quarrying equipment
- Agricultural machinery and irrigation systems
- Industrial gearbox and power transmission assemblies
Compatibility & Replacements
Compatible With
- SKF 1220 K self-aligning ball bearings
- SKF 22220 EK spherical roller bearings
- SKF C2220 EK spherical roller bearings
- Standard 20 mm bore shaft diameters
- Two-bolt pillow block mounting systems
Replaces / Drop-In Replacement For
- FAG SAF 520U X
- Timken FSAF 520 (note: Timken version uses four-bolt base, verify mounting requirements)
- Similar SAF-series split pillow block housings from alternative suppliers
Works With
- SKF lubrication systems and grease cartridges compatible with SAF housings
- Standard shaft and bearing coupling systems
- Industrial maintenance and monitoring equipment
- Condition monitoring sensors and vibration analysis tools
