Overview
The SKF SAF-526 pillow block bearing housing is a robust, split-design unit engineered to accommodate adapter-mounted spherical roller bearings in demanding industrial applications. Cast from high-quality ductile iron and compliant with ASTM A48 Grade 35 standards, this housing provides stable shaft support and alignment for heavy-duty power transmission systems including conveyors, crushers, and rotating machinery.
Key Features
- Split Housing Design — Two-piece construction enables quick bearing installation and simplified maintenance without disturbing the shaft assembly.
- Four-Bolt Base Mount — Securely fastens to equipment frames with a 16-inch bolt center-to-center spacing and 5.25-inch base width for stable mounting.
- Triple Ring Seals — Includes two LOR 117 aluminum labyrinth triple seal rings to protect bearings from contaminants and retain lubricant integrity.
- Spherical Roller Compatible — Accepts SKF 22226 EK and C2226 EK spherical roller bearings for misalignment tolerance and shock load capacity.
- Cast Iron Construction — ASTM A48 Grade 35 materials ensure durability, wear resistance, and extended service life in abrasive industrial environments.
Technical Specifications
Housing and Mounting:
- Series: SAF (SKF Adapter-mounted Flange)
- Housing Type: Split pillow block
- Mounting: Four-bolt base
- Base Width: 5.25 inches
- Bolt Center-to-Center Length: 16 inches
Dimensional Data:
- Overall Length: 18.375 inches
- Overall Height: 11.3125 inches
- Overall Width: 8.125 inches
- Base to Bore Centerline: 6 inches
- Weight: 108.16 lbs
Bore and Bearing Compatibility:
- Compatible Bore Diameter: 4.4375 inches (4 7/16″), 4.5 inches
- Shaft Diameter Range: 4 3/8″, 4 5/16″, 4 7/16″, 4 1/2″
- Compatible Bearing Type: Spherical roller
- Compatible Bearing Series: SKF 22226 EK, C2226 EK
Material and Sealing:
- Housing Material: Cast iron (ASTM A48 Grade 35)
- Finish: Uncoated
- Sealing: LOR 117 aluminum labyrinth triple seal rings (qty. 2)
Typical Applications
The SKF SAF-526 is ideal for heavy-duty industrial environments requiring stable, long-term shaft support:
- Belt and chain conveyor systems
- Jaw and cone crushers in mining and aggregate processing
- Industrial gearboxes and speed reducers
- Sawmill and woodworking equipment
- Large rotating shafts requiring misalignment compensation
Compatibility & Replacements
Compatible With
- SKF 22226 EK spherical roller bearing
- SKF C2226 EK spherical roller bearing
- Four-bolt base mounting surfaces on standard industrial frames
- Adapter-mounted bearing assemblies requiring 4.5-inch or 4.4375-inch bores
- Industrial power transmission systems with 6-inch base-to-bore centerline spacing
Replaces / Drop-In Replacement For
The SKF SAF-526 is a direct replacement for OEM equipment originally specified with SAF-526 housings. For alternative SAF series housings or cross-compatible units from other manufacturers, verify bearing bore diameter and mounting dimensions before substitution. Consult your equipment manual or systems integrator to confirm compatibility.
Works With
- SKF SAF series adapter-mounted bearing inserts
- Standard industrial lubricants and greases approved for spherical roller bearings
- Four-bolt pillow block mounting standards used across industrial equipment manufacturers
- Shaft materials including carbon steel and alloy steel
