The Alltrux ATX-S404 Drive Axle Inner Wheel Bearing Set replaces industry set SET404TRB and is engineered for heavy-duty commercial truck wheel end applications, including Mack special radius axle configurations. This tapered roller bearing assembly is equivalent to cone 598A and cup 592A, designed to handle the high radial and axial loads experienced at the inner wheel end of drive axle hub assemblies.

Tapered roller bearing sets like SET404 are precision-engineered to maintain proper wheel hub alignment, reduce friction, and ensure reliable load distribution across the axle during heavy hauling and vocational service. The inner wheel bearing position plays a critical role in stabilizing the hub assembly and supporting long-term drivetrain durability under continuous load and vibration.

Manufactured to meet industry-standard dimensional and performance requirements, this bearing set provides dependable service life for fleet maintenance, axle rebuilds, and wheel end overhauls. Designed for compatibility with heavy-duty truck drive axle hubs, including Mack special radius applications, this set should be installed with proper lubrication and preload adjustment to ensure optimal wheel end performance and longevity.

Key Features

Industry standard SET404TRB wheel bearing set
Alltrux Part Number: ATX-S404
Equivalent to tapered roller cone 598A and cup 592A
Designed for drive axle inner wheel end applications
Suitable for Mack special radius axle configurations
Supports heavy radial and axial load handling in hub assemblies

Technical Specifications

Brand: Alltrux
Part Number: ATX-S404
Industry Set Number: SET404TRB
Cone Number: 598A
Cup Number: 592A
Bearing Type: Tapered Roller Bearing Set (Cone & Cup)
Position: Drive Axle – Inner Wheel Bearing
Application Note: Mack Special Radius Compatibility
Condition: New Aftermarket
Application: Heavy-Duty Truck Drive Axle Wheel End Assemblies

Cross References

INDUSTRY: SET404TRB
TIMKEN: 598A / 592A
ALLTRUX: ATX-S404