Products
Double-Row Tapered Roller Bearings
Product Overview
Double-Row Tapered Roller Bearings combine two rows of tapered rollers in one bearing assembly to carry high radial loads and axial loads in both directions. Their wide effective bearing spread provides greater rigidity and resistance to tilting moments than a comparable single-row arrangement.
Common designs include TDO configurations with one double outer ring and two inner ring assemblies, and TDI configurations with one double inner ring and two outer rings. They are used in heavy wheel hubs, gearboxes, railway equipment, rolling equipment, and industrial machinery requiring compact bidirectional support and controlled operating clearance.
Technical Specifications
| Product Type | Double-row tapered roller bearings |
| Design Options | TDO, TDI, matched double-row assemblies, and application-specific configurations |
| Load Direction | High radial load with axial load in both directions |
| Rigidity | Wide effective bearing spread for strong resistance to tilting moments |
| Clearance / Preload | Preset or adjustable endplay and preload according to application requirements |
| Precision Grades | Standard industrial precision and higher-precision OEM options |
| Material Options | Chrome steel rings and rollers with pressed steel, pin-type, or engineered cage options |
| Lubrication | Grease or circulating oil selected for load, speed, temperature, and maintenance interval |
| Typical Applications | Heavy vehicle hubs, railway systems, industrial gearboxes, mining machinery, rolling equipment, and heavy-duty transmissions |
| OEM Support | Boundary dimensions, internal geometry, clearance, preload, cage, lubrication, marking, packaging, and inspection documentation |
Key Features
Bidirectional axial support – two tapered roller rows carry axial loads in both directions together with high radial loads.
High system rigidity – the wide effective bearing span improves shaft guidance and resistance to tilting moments.
Compact heavy-load solution – integrates two bearing rows into one controlled assembly for demanding installations.
Controlled clearance or preload – internal settings can be specified to balance rigidity, temperature, and bearing life.
TDO and TDI configurations – multiple ring arrangements support different mounting and maintenance requirements.
OEM engineering support – ETM can match dimensions, internal design, cage, preload, lubrication, marking, and packaging to operating conditions.
Applications
Double-Row Tapered Roller Bearings are selected for compact assemblies that must carry heavy radial loads, axial loads in both directions, and significant tilting moments. They are especially suitable for heavy vehicle hubs, mining machinery, railway systems, agricultural equipment, and rigid machine tool arrangements.
Technical Resources
Whether you are an engineer, procurement manager, or equipment maintenance professional, here you will find in-depth content covering bearing operating principles, technical parameter interpretation, industry application guidance, selection methods, installation and maintenance practices, and purchasing considerations.
FAQs
What loads can double-row tapered roller bearings support?
They support high radial loads and axial loads in both directions. Their two-row geometry also provides strong resistance to overturning moments, making them suitable for rigid hubs, gearboxes, and heavy rotating assemblies.
What is the difference between TDO and TDI designs?
A TDO design normally uses one double outer ring with two inner ring assemblies and provides a wide effective bearing spread. A TDI design uses one double inner ring with two outer rings and can suit installations where the shaft-side assembly and axial location requirements differ.
How is clearance or preload specified?
Clearance or preload may be preset by the bearing design or controlled through spacers and mounting adjustment. Selection should consider fits, operating temperature, shaft and housing stiffness, speed, lubrication, and the required running accuracy.
When should a double-row design be used instead of paired single-row bearings?
A double-row bearing is useful when the application needs a compact integrated assembly, bidirectional axial support, high rigidity, and controlled internal setting. Paired single-row bearings may offer more arrangement flexibility when installation space and adjustment procedures allow it.
Which industries commonly use double-row tapered roller bearings?
Typical applications include heavy vehicle wheel hubs, mining crushers and gearboxes, railway axle or drive systems, agricultural hubs and transmissions, and machine tool spindles or rotary tables.
Can ETM customize double-row tapered roller bearings?
Yes. ETM can support OEM requirements for boundary dimensions, TDO or TDI configuration, clearance, preload, cage, lubrication, heat treatment, marking, packaging, and inspection documentation.
How does misalignment affect double-row tapered roller bearings?
Double-row tapered roller bearings are designed for high rigidity but generally have limited tolerance for shaft or housing misalignment. Excessive deflection or installation error can concentrate load at the roller ends, increase temperature, and shorten bearing life, so accurate seats and rigid support are important.
What lubrication and mounting practices are recommended for double-row designs?
Use grease or oil with viscosity and additives suited to the load, speed, and temperature. Apply force only through the ring being fitted, keep all components clean, verify spacer and preload settings, and confirm free rotation and operating temperature after assembly.
What information is required to select or quote a double-row tapered roller bearing?
Provide the bearing designation or dimensions, TDO or TDI preference if known, radial and bidirectional axial loads, moment load, speed, shaft and housing fits, clearance or preload requirement, lubrication, operating temperature, expected life, quantity, and documentation needs.
Get a Fast Response from Our Team
Share your double-row tapered roller bearing requirements or project details – our team will review dimensions, radial and axial loads, moment load, speed, clearance, preload, lubrication, and packaging needs to recommend a suitable solution.
ETERNUM MOTION TECHNOLOGY