EE130902-902A6 Double row taper roller Bearing 228.6×355.6mm
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EE130902-902A6 Double row taper roller Bearing 228.6×355.6mm
Comparative Design Advantages
Compared to standard single-row tapered designs, the EE130902-902A6 assembly handles combined axial and radial forces with significantly higher rigidity. The dual-cup configuration eliminates preload variation across mating surfaces, delivering consistent contact geometry even under shock loads. Engineers specify this unit when space is constrained but operational demands require superior moment resistance.
At a glance
- Specification: Value
- Model Number: EE130902-902A6
- Outer Diameter (D): 355.6 mm
- Inner Diameter (d): 228.6 mm
Structural Geometry and Boundary Envelope
Precise envelope sizing dictates direct fitment into existing housings without custom machining. The nominal cross-section aligns with a standardized inch-based dimensional series, ensuring predictable clearance retention for the EE130902-902A6 unit. The outer ring maintains strict perpendicularity relative to the axis, while the inner cup group accommodates a straight cylindrical journal. This layout simplifies alignment checks during installation.
| Specification | Value |
|---|---|
| Model Number | EE130902-902A6 |
| Outer Diameter (D) | 355.6 mm |
| Inner Diameter (d) | 228.6 mm |
| Overall Width (B) | 152.4 mm |
| Bore Type | Z = Cylindrical Bore |
| Bearing Series | 130000 |
| Assembly Type | Double Row, TDO |
Tolerance stacking remains tight across mating flanges. Manufacturers rely on these exact measurements to calculate housing shoulder heights accurately. Any deviation beyond standard boundaries compromises the designed contact angle.
Combined Load Rating Profile
Distributing stress across two roller complements increases static capacity substantially. Each row shares applied force, preventing localized fatigue spalling. The conical profile directs resultant vectors toward the large roller end, maximizing edge support. This arrangement sustains mixed directional loads that would quickly degrade conventional cylindrical setups. Calculations for the EE130902-902A6 must account for the effective pressure center shift.
Thermal Management and Speed Limits
Limiting rotational velocity ensures adequate lubricant film formation. Exceeding recommended thresholds generates frictional heat, accelerating grease breakdown. The allowable operating temperature ranges from -30 to +110 °C, providing sufficient margin for standard petroleum lubricants at moderate speeds. Near upper velocity limits, forced circulation cooling becomes necessary.
Thermal stability within the EE130902-902A6 depends heavily on initial preload settings. Over-tightening restricts roller freedom, while insufficient clamping causes cage instability. A balanced approach preserves load distribution throughout service life.
- Verify shaft finish meets Ra 0.4–0.8 μm standards
- Apply anti-seize paste to thread engagement zones
- Torque locking nuts using calibrated instruments
- Monitor runout at both diameter faces
Installation Protocols and Clearances
Axial displacement determines final preload. Technicians measure free play before tightening the adjusting mechanism, backing off slightly for optimal running clearance. Tapered raceways require careful inspection; microscopic scoring alters the contact patch. Consistent lubrication prevents galling during future maintenance. Housing squareness and journal roundness must be confirmed before finalizing stack height.
Component Referencing and Sourcing
Decoding the identification string clarifies substitute sourcing. Suffix designations indicate cup and cone pairings alongside bore modifications. Cross-referencing legacy catalogs requires matching the base series code rather than relying on alphanumeric guesses. Our catalog maps this designation to compatible Double row taper roller bearings category listings for streamlined procurement. Engineers consulting a standard bearing number reference guide will find consistent mapping rules across conversions. Every unit undergoes hardness profiling before leaving our facility. Contact FIJ Bearing directly. Request a quote today for reliable delivery.