The Alltrux ATX-S426 Rear Axle Outer Wheel Bearing Set replaces industry standard SET426TRB and is engineered for heavy-duty Mack truck drive axle wheel end applications requiring high load capacity and long service life. This tapered roller bearing assembly is equivalent to cone 47679 and cup 47620 and is commonly used as the outer wheel bearing in rear drive axle hub assemblies for heavy-duty commercial vehicles.

Tapered roller bearing sets like SET426 are designed to manage both radial and axial loads while maintaining precise hub alignment and smooth rotation under severe operating conditions. Often referred to as a MileMate-style bearing in heavy-duty applications, this set features an approximate 3.000 inch bore, 5.250 inch outside diameter, and 1.313 inch width, supporting demanding freight, vocational, and off-highway service environments.

Manufactured from durable case-carburized steel for resistance to wear and harsh conditions, this bearing set is ideal for fleet maintenance, axle rebuilds, and preventive wheel end service on Mack trucks and similar heavy-duty drive axle applications. Proper lubrication, installation, and preload adjustment are essential to maximize bearing life and ensure safe, reliable rear axle operation.

Key Features

Industry standard SET426TRB wheel bearing set
Alltrux Part Number: ATX-S426
Equivalent to tapered roller cone 47679 and cup 47620
Designed for rear drive axle outer wheel end applications (Mack)
High load capacity for heavy-duty truck and vocational service
Ideal for fleet axle rebuilds and wheel end maintenance

Technical Specifications

Brand: Alltrux
Part Number: ATX-S426
Industry Set Number: SET426TRB
Cone Number: 47679
Cup Number: 47620
Bearing Type: Tapered Roller Bearing Set (Cone & Cup)
Position: Rear Axle – Outer Wheel Bearing
Application Note: Mack Drive Axle Applications
Bore Diameter: 3.000 in
Outer Diameter: 5.250 in
Width: 1.313 in
Material: Case-Carburized Steel
Condition: New Aftermarket
Application: Heavy-Duty Mack Truck Drive Axle Wheel End Assemblies

Cross References

INDUSTRY: SET426TRB
CONE: 47679
CUP: 47620
ALLTRUX: ATX-S426