Overview
The Dodge SAF-XT-520 (part number 042129) is a heavy-duty pillow block housing for spherical roller bearing installations in industrial power transmission and material handling applications. The SAF-XT-520 features split housing design that simplifies bearing inspection and replacement without requiring complete shaft removal. This cast iron housing accommodates adapter-mounted 22200K series spherical roller bearings across a 3-7/16″ to 3-1/2″ shaft size range.
Key Features
- Split housing construction — enables bearing replacement with minimal downtime; cap removal and re-seating accomplished without specialized tools
- Triple-Tect seals — multi-stage sealing system with grease relief channels and self-centering positive contact design for contamination resistance
- Four-bolt base mounting — standard footprint compatible with SAF dimensional standards; includes pry slots and elongated bolt holes for easier installation
- Optimized load capacity — SAF-XT offset design improves load carrying versus standard USAF housings
- Single grease fitting — centralized lubrication point reduces complexity and chance of voids during regreasing
Technical Specifications
- Bore Range: 3-7/16″ to 3-1/2″
- Overall Length: 15-1/4″
- Overall Width: 6.22″
- Overall Height: 8-3/4″
- Base to Bore Centerline: 4-1/2″
- Bolt Center-to-Center Length: 12-3/4″
- Base Width: 4.38″
- Material: Cast Iron (Uncoated)
- Mounting Style: 4-Bolt Base (Fixed/Non-Expansion)
- Bearing Type: Adapter Mounted 22200K Series Spherical Roller
- Seal Type: Triple-Tect with LER options
- Housing Series: SAF-XT (Series 520)
Typical Applications
- Conveyor systems and bulk material handling equipment
- Crusher and grinding mill drive shafts
- Air handling and fan motors
- Industrial fan and blower applications
- Heavy-duty transmission and gearbox housings
- Paper mill and sawmill equipment
Compatibility & Replacements
Compatible With
- Dodge 22200K series spherical roller bearings
- SKF SAF 520 housings (dimensional interchangeability)
- Timken SAF 225/SAF 226 bearing inserts
- FAG/Schaeffler SAF-format bearings
- Dodge split-spher insert replacements (reduced downtime retrofit option)
Replaces / Drop-In Replacement For
- Dodge SAF 520 (standard SAF housing) — SAF-XT provides superior sealing and load capacity in the same footprint
- Verify compatibility with your system integrator before ordering.
Works With
- Standard SAF pillow block dimension standards (ISO)
- 4-bolt fixed mounting base systems
- Tapered bore adapter designs for flexible shaft accommodation
- Grease-lubricated applications (pack per Dodge MN3018 instruction manual)
