With a wide range of designs to choose from, OW® tapered roller bearings are also customizable to match your specific speed, load, contamination, temperature or vibration conditions.
Tapered roller bearings feature a cup and cone assembly. The cup is comprised of the outer ring and the cone assembly consists of inner ring, rollers, and cage. This bearing construction accommodates combined loads and provides low friction during operation. By adjusting one single row tapered roller bearing against a second tapered roller bearing and applying a preload, a rigid bearing application can be achieved.
OW® tapered roller bearings are also made to Explorer class. OW® Explorer combines our expertise in bearing design, tribology, metallurgy, lubrication and manufacturing. OW® Explorer tapered roller bearings are typically used in bearing solutions where there is a need to increase performance, reduce friction or increase power density in applications.
Applications
Single row tapered roller bearings are typically used in applications with combined loads. Single row tapered roller bearings can also be used in sets. Single row tapered roller bearings can be matched face-to-face, back-to-back or in tandem to deliver specific advantages depending on operating conditions.
Double row tapered roller bearings are typically used in gearboxes, hoisting equipment, rolling mills and machines in the mining industry.
Four row tapered roller bearings are used almost exclusively in work roll applications such as rolling mills.
Single row tapered roller bearings
OW® single row tapered roller bearings are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads. The projection lines of the raceways meet at a common point on the bearing axis (apex point A) to provide a true rolling action and therefore low frictional moments during operation. The axial load carrying capacity of tapered roller bearings increases with increasing contact angle α. The size of the contact angle, which is usually between 10° and 30°, is related to the calculation factor e (from the product table): the larger the value of e, the larger the contact angle.
Series
| Series | Description | Typical Models | Typical Applications |
|---|---|---|---|
| 30200 Series | Light series single row tapered roller bearings | 30202, 30203, 30204, 30205, 30206 | Automotive wheel hubs, light gearboxes, small machinery |
| 30300 Series | Medium series single row tapered roller bearings | 30304, 30305, 30306, 30307, 30308 | Industrial gearboxes, pumps, conveyors |
| 31300 Series | Heavy series single row tapered roller bearings | 31305, 31306, 31307, 31308, 31309 | Mining equipment, construction machinery, heavy drives |
| 32200 Series | Automotive/general-purpose series | 32205, 32206, 32207, 32208, 32209 | Automotive transmissions, agricultural machinery |
| 32300 Series | Heavy-duty industrial series | 32305, 32306, 32307, 32308, 32309 | Gear reducers, heavy industrial equipment |
| 32900 Series | Compact high-load series | 32905, 32906, 32907, 32908, 32909 | Truck hubs, axle systems, drivetrain applications |
| 32000 Series | Standard metric series | 32004, 32005, 32006, 32007, 32008 | General industrial machinery, gearboxes |
| 33000 Series | Heavy-duty metric series | 33005, 33006, 33007, 33008, 33009 | Mining machinery, heavy equipment |
| 33100 Series | Extra heavy-duty series | 33108, 33109, 33110, 33111 | Large industrial drives, wind energy systems |
| 33200 Series | Ultra heavy-duty series | 33205, 33206, 33207, 33208, 33209 | Steel mills, construction machinery |
Features and benefits
- Low friction
- The optimized roller end design and surface finish on the flange promote lubricant film formation, resulting in lower friction. This also reduces frictional heat and flange wear. In addition, the bearings can better maintain preload and run at reduced noise levels.
- Low friction
- The optimized roller end design and surface finish on the flange promote lubricant film formation, resulting in lower friction. This also reduces frictional heat and flange wear. In addition, the bearings can better maintain preload and run at reduced noise levels.
Coventional
Crowned
Logarithmic
- Enhanced operational reliability
- Optimized surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
- Consistency of roller profiles and sizes
- The rollers incorporated in OW® tapered roller bearings are manufactured to such close dimensional and geometrical tolerances that they are practically identical. This provides optimal load distribution, reduces noise and vibration, and enables preload to be set more accurately.
- Rigid bearing application
- A single row tapered roller bearing is typically adjusted against a second tapered roller bearing. By applying a preload, a rigid bearing application can be achieved.
- Separable and interchangeable
- The inner ring with roller and cage assembly (cone) can be mounted separately from the outer ring (cup). Furthermore, the separable components are interchangeable. This facilitates mounting, dismounting and also maintenance inspection routines.
Combination use of single row tappered roller bearing
- DB Arrangement (Back-to-Back)
- Back-to-Back (DB) Arrangement features two bearings mounted with their contact lines diverging outward. This configuration provides high rigidity and excellent resistance to overturning moments, making it ideal for applications requiring precise shaft guidance and high load-carrying capacity.
- Typical Applications: Machine tool spindles, gearboxes, pumps, and industrial drives.
- DF Arrangement (Face-to-Face)
- Face-to-Face (DF) Arrangement features two bearings mounted with their contact lines converging toward the shaft center. This arrangement accommodates shaft misalignment better than the DB configuration and provides stable operation under combined radial and axial loads.
- Typical Applications: Pumps, fans, conveyors, and general industrial machinery.
- DT Arrangement (Tandem)
- Tandem (DT) Arrangement features two bearings mounted in the same direction, allowing them to share axial loads acting in a single direction. This configuration significantly increases axial load capacity but requires an additional bearing arrangement to support axial loads in the opposite direction.
- Typical Applications: Screw drives, extruders, high axial-load pumps, and heavy-duty industrial equipment.
Double row tapered roller bearings
OW® manufactures double row tapered roller bearings in the TDO and TDI designs, in many variants and with different features. Depending on the design, these bearings can accommodate heavy radial loads, axial loads in both directions and have a high degree of stiffness. Double row tapered roller bearings are typically used in gearboxes, hoisting equipment, rolling mills and machines in the mining industry, e.g. tunnelling machines.
Features and benefits
- High load carrying capacity
- Double row tapered roller bearings are suitable for heavy radial and axial loads. The axial load carrying capacity of tapered roller bearings increases with increasing contact angle α. The size of the contact angle, which is usually between 10° and 30°, is related to the calculation factor e (from the product tables): the larger the value of e, the larger the contact angle.
- Axial loads in both directions
- Double row tapered roller bearings locate the shaft in both directions with a specific axial clearance or preload.
- High stiffness
- Double row tapered roller bearings provide a stiff bearing arrangement.
- Low friction
- The optimized roller end design and surface finish on the flange promote lubricant film formation, resulting in lower friction. This also reduces frictional heat and flange wear. In addition, the bearings can better maintain preload and run at reduced noise levels.
- Enhanced operational reliability
- Optimized surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
- Consistency of roller profiles and sizes
- The rollers incorporated in SKF double row tapered roller bearings are manufactured to such close dimensional and geometrical tolerances that they are practically identical. This provides optimal load distribution, reduces noise and vibration, and enables preload to be set more accurately.
Four-row tapered roller bearings
Four-row tapered roller bearings can accommodate combined (radial and axial) loads at low to moderate speeds. They are used almost exclusively in work roll applications such as rolling mills.
Features and benefits
Depending on their design, four-row tapered roller bearings provide the following main features and benefits:
- Long service life
- The four-cup design (four separate outer rings) provides optimal load distribution over all four rows of rollers.
- Enhanced operational reliability
- Optimized surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
- Improved wear resistance
- In particular, OW® Explorer bearings are made of extremely clean and homogenous steel and undergo a unique heat treatment, which improve the resistance to wear.
- Equal load carrying capacity for sealed and open bearings
- The optimized and compact seal design enables identical internal design.
- Total bearing interchangeability
- Bearings with and without spacers as well as open and sealed bearings are available with identical external dimensions. This allows total bearing interchangeability of current standard design bearings with those without spacers and/or with optimized seal design.
- Separable mounting and simpler inspection
- Optimized designs without spacers enable to dismount and separate the cage and roller assemblies and seals. This facilitates mounting, dismounting, and also maintenance inspection routines.