Products
Tapered Roller Bearings
Product Overview
Tapered Roller Bearings are a high-capacity rolling bearing type featuring conical (tapered) rollers arranged between tapered inner and outer ring raceways, with all roller axes converging at a common point on the bearing centerline. This geometry allows the bearing to support substantial combined radial and axial loads simultaneously, making it one of the most load-dense bearing types available, particularly well-suited for applications involving heavy loads and moderate-to-high speeds.
Available in single-row, double-row (TDO/TDI), and four-row configurations, Tapered Roller Bearings can be tailored to specific load magnitude, load direction, and rigidity requirements. Precision grades from Class 4 (standard) to Class 0/00 (high precision) are available depending on application demands, with clearance/preload settings adjustable through axial positioning during installation. Most designs feature separable inner and outer ring assemblies (cone and cup), allowing independent mounting and simplified maintenance.
Product Specifications
| Series | 302, 320, 322, 330, 332 Series (Single-Row); TDO/TDI Double-Row |
| Bore Diameter Range | 12mm – 750mm |
| Outer Diameter Range | 30mm – 1090mm |
| Width Range | 9mm – 224mm |
| Cage Material Options | Steel stamped, brass machined, polyamide PA66 |
| Configuration Options | Single-row, double-row (TDO/TDI), four-row (TQO) |
| Precision Grades | Class 4 standard, Class 2, Class 0/00 high precision |
| Clearance / Preload | Adjustable via cone axial positioning during mounting |
| Material Standard | Gcr15 / 52100 chrome steel, case-hardened alloy steel optional |
| Temperature Range | -40掳C to +150掳C standard, up to +200掳C high temperature |
| Lubrication | Grease standard, oil optional, circulating oil for heavy-load/continuous duty |
| Standards Met | ISO 9001, IATF 16949, ISO 355, DIN 720, JIS |
Featured Products
Single-Row Tapered Roller Bearings
Single-row tapered roller bearings feature a single row of tapered rollers between a tapered inner ring (cone) and outer ring, with roller axes converging at a common point, enabling them to support substantial radial loads together with axial loads in one direction. The cone and cup are separable, simplifying installation and clearance adjustment. As the most widely used and cost-effective configuration, it is often mounted individually or paired with another single-row bearing (back-to-back/face-to-face) for bidirectional axial support, commonly applied in automotive wheel hubs, transmissions, industrial gearboxes, and agricultural machinery.
Double-Row Tapered Roller Bearings
Double-row tapered roller bearings integrate two rows of tapered rollers within a single bearing assembly, enabling them to support substantial radial loads together with bidirectional axial loads. Common configurations include the TDO type (outer ring large-end faces outward, back-to-back arrangement, offering higher rigidity and strong resistance to tilting moments) and the TDI type (outer ring large-end faces inward, face-to-face arrangement, suited to axially constrained installations). This series is widely used in automotive wheel hub units, industrial gearboxes, construction equipment, and rolling mill applications requiring bidirectional axial support and high rigidity.
Key Features
- High combined load capacity – efficiently supports heavy radial loads together with substantial axial loads in one direction (single-row) or both directions (double-row/paired)
- Adjustable internal clearance – axial position of the cone assembly can be set during installation to achieve the desired clearance or preload
- Separable design – cone (inner ring + rollers + cage) and cup (outer ring) can be mounted independently, simplifying assembly and replacement
- High rigidity and shock resistance – line contact between rollers and raceways distributes load over a larger contact area, suitable for heavy-duty and shock-loading conditions
- Compatible with grease and oil lubrication, including circulating oil systems for high-load, continuous-duty applications
- Compliant with international standards, including ISO 355, ANSI/ABMA, DIN 720, and JIS
Applications
Tapered Roller Bearings are widely used in the automotive industry, particularly in wheel hubs, differentials, and transmissions, where they support the combined radial and axial loads generated during vehicle operation, cornering, and braking.
In industrial gearboxes and power transmission systems, the series handles heavy combined loads generated by gear meshing forces, providing stable support across a wide range of shaft sizes and torque levels.
In construction and mining equipment, including excavators, loaders, and crushers, Tapered Roller Bearings deliver the high load capacity and shock resistance required under harsh, heavy-duty operating conditions.
In agricultural machinery, the series supports axles, gearboxes, and rotary components subject to variable and heavy loading. In the rolling mill and metal processing industry, four-row tapered roller bearings provide the extreme load capacity required for heavy roll-neck support.
The series is also widely applied in railway axle boxes, wind turbine main shafts and gearboxes, marine propulsion systems, and material handling equipment, wherever a combination of heavy radial load, axial load, and operational reliability is required.
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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 analysis, and selection logic — helping you build a comprehensive understanding of bearing products and make more informed decisions in real-world applications.
Tapered Roller Bearings A Complete Guide to Structure, Working Principle, Selection, and Applications
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Bearing Seals and Shields: A Complete Guide to Z, ZZ, RS, RZ, RS1, and 2RS1 Types
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FAQs
What loads can deep groove ball bearings handle?
Deep groove ball bearings are primarily designed for radial loads, but they can also handle moderate axial (thrust) loads in both directions. They are not suitable for heavy axial loads or combined shock loads. In those cases, angular contact or tapered roller bearings are preferred.
How do I select the right bearing size for my application?
Selection should be based on bore diameter (shaft size), required load capacity (dynamic rating C and static rating C0), operating speed compared with the bearing limiting speed, available space (outer diameter and width), and required precision grade from P0 to P2. Always apply a safety factor and verify that the calculated L10 service life meets your requirements.
What is the difference between open, shielded (ZZ), and sealed (2RS) bearings?
Open: No built-in protection, requires external sealing, and is suitable for clean environments or oil bath lubrication.
ZZ metal shields: Protect against dust and debris with low friction, making them suitable for high-speed applications, but they are not waterproof.
2RS rubber seals: Provide strong protection against dust and moisture. They are pre-greased and ideal for contaminated environments, but generate slightly more friction.
How often should I lubricate or replace the grease?
For general industrial use, grease should be replenished or replaced every 3,000 to 10,000 operating hours depending on speed, temperature, and environmental conditions. Bearings running above 70 C or in contaminated environments require shorter intervals. Sealed 2RS bearings are pre-greased for life and do not require re-lubrication.
What are the common causes of premature bearing failure?
The most frequent causes include inadequate or improper lubrication, contamination by dirt, dust, or moisture, incorrect installation, misalignment, excessive force during fitting, overloading beyond the rated capacity, improper shaft or housing fits, and fatigue at the end of normal service life.
How is the rated service life (L10) of a bearing calculated?
The basic L10 life is calculated as L10 = (C / P)^3 x 10^6 revolutions, where C is the dynamic load rating in kN and P is the equivalent dynamic bearing load in kN. It represents the number of revolutions that 90% of identical bearings will complete without fatigue failure. In practice, ISO 281 modified life calculations also apply correction factors for lubrication, contamination, material, and reliability.
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