Products
Tapered Roller Bearings
Product Overview
Tapered Roller Bearings are rolling bearings designed with tapered rollers running between conical inner and outer ring raceways. This structure allows the bearing to support heavy radial loads and axial loads in one direction simultaneously, making it suitable for applications where high load capacity, rigidity, and shock resistance are required. They are widely used in automotive wheel hubs, gearboxes, agricultural machinery, construction equipment, trailers, industrial transmission systems, and other heavy-duty mechanical applications.
Tapered Roller Bearings are available in a wide range of standard series, including 302, 303, 313, 320, 322, 323, 329, 330, 331, and 332 series, covering both general industrial and automotive applications. Single-row tapered roller bearings are the most commonly used type, while double-row and four-row designs can be provided according to specific application requirements.
Most tapered roller bearings feature a separable structure, with the inner ring and roller assembly known as the cone and the outer ring known as the cup, allowing easier installation, inspection, and maintenance. Standard precision grades such as P0 and P6 are commonly available, while higher precision grades can be supplied upon request. Clearance and preload can be adjusted during installation to meet different requirements for running stability, load distribution, and service life.
Technical Specifications
| Series | 302, 320, 322, 330, 332 Series (Single-Row); TDO/TDI Double-Row |
| Bore Diameter Range | 12 mm – 750 mm |
| Outer Diameter Range | 30 mm – 1090 mm |
| Width Range | 9 mm – 224 mm |
| Cage Material Options | Steel Stamped, Machined Brass, 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 / AISI 52100 Chrome Steel, Case-Hardened Alloy Steel Optional |
| Temperature Range | -40°C to +150°C (Standard), Up to +200°C for High-Temperature Applications |
| Lubrication | Grease Lubrication Standard, Oil Lubrication Optional, Circulating Oil Recommended for Heavy-Load or Continuous-Duty Applications |
| 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.
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.
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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