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Category
30308
Tapered roller bearing is a precision rolling-element bearing designed to handle combined radial and heavy single-direction axial loads simultaneously. Its namesake conical geometry is key, enabling it to efficiently manage and transfer these combined loads.
Taper Roller Bearing
| ISO | 30308 | |
| GOST | 7308 | |
| Bore diameter | d | 40 mm |
| Outside diameter | D | 90 mm |
| Width of inner ring | B | 23 mm |
| Width of outer ring | C | 20 mm |
| Total width | T | 25.25 mm |
| Basic dynamic load rating | C | 51.5 kN |
| Basic static load rating | C0 | 57 kN |
| Reference speed | 3600 r/min | |
| Limiting speed | 2700 r/min | |
| Weight | 0.72 kg | |
Structure
A standard tapered roller bearing consists of four main components:
- Inner Ring (Cone):Features a conical raceway.
- Outer Ring (Cup):Features a matching conical-angle raceway.
- Tapered Rollers:Precisely ground conical rollers that roll between the inner and outer ring raceways. They are the core load-carrying elements.
- Cage/Retainer:Typically made of stamped steel or engineered polymer. It spaces and guides the rollers evenly, preventing contact and ensuring smooth operation.
Key Characteristics
- Exceptional Combined Load Capacity:The tapered design allows these bearings to efficiently carry significant radial loads alongside heavy axial loads in one direction.
- Superior Axial Displacement Resistance:When mounted in pairs (typically back-to-back or face-to-face), they restrict axial displacement between the shaft and housing, offering precise axial location.
- Design & Mounting Flexibility:Featuring separable inner and outer rings, they facilitate easier installation, removal, and critical bearing clearance/preload adjustment. Adjusting preload optimizes rigidity and lifespan.
- Broad Applicability:Available in different size series to accommodate diverse load capacity needs.
Typical Applications
Valued for their robust load capacity and positioning accuracy, tapered roller bearings are widely used in demanding applications involving heavy loads and shock, such as:
- Automotive:Transmissions, differentials, wheel hubs (often used in pairs).
- Construction/Agriculture:Gearboxes, axles, and support rolls in excavators, loaders, tractors.
- Mining Equipment:Crushers, ball mills, conveyor systems.
- Metallurgical Equipment:Roll necks in rolling mills.
- Wind Turbine Gearboxes.
- Industrial Machinery:Gear reducers, pumps, heavy-duty drive systems.
Tapered roller bearings are the ideal solution for reliable, efficient, and precise rotational support in critical machinery applications.
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