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Technical Specification .webp "30308 7308E Metric Tapered Roller Bearings")
.webp "diagram of dsbr metric tapered roller bearings (2)")
30308 7308E single row tapered roller bearings are engineered to support combined radial and thrust loads with minimal rolling resistance. The inner assembly—comprising the raceway, rollers, and cage—is separable from the outer ring, allowing for flexible installation, simplified disassembly, and easy maintenance. When used in matched pairs with preload, these bearings deliver high rigidity and precise shaft positioning.
The 30308 7308E is a versatile tapered roller bearing used in trailers, light-duty trucks, and rotating shafts. Its optimized roller contact reduces friction and increases load distribution, enhancing both efficiency and durability.Ideal for heavy-duty applications, they offer:
Excellent capacity for both radial and axial forces
Support for axial loads in a single direction
Reduced friction for efficient, high-speed operation
Durable, replaceable, and service-friendly design
Technical Specification 
| Dimensions | ||
| d | 40 mm | Bore diameter |
| D | 90 mm | Outside diameter |
| T | 25.75 mm | Total width |
| d1 | ≈62.55 mm | Shoulder diameter of inner ring |
| B | 23 mm | Width of inner ring |
| C | 20 mm | Width of outer ring |
| r1,2 | min.2 mm | Chamfer dimension of inner ring |
| r3,4 | min.1.5 mm | Chamfer dimension of outer ring |
| a | 19.05 mm | Distance side face to pressure point |
| Abutment dimensions | ||
| da | max.53 mm | Diameter of shaft abutment |
| db | min.49.5 mm | Diameter of shaft abutment |
| Da | min.77 mm | Diameter of housing abutment |
| Da | max.82 mm | Diameter of housing abutment |
| Db | min.82 mm | Diameter of housing abutment |
| Ca | min.3 mm | Minimum width of space required in housing on large side face |
| Cb | min.5 mm | Minimum width of space required in housing on small side face |
| ra | max.2 mm | Radius of shaft fillet |
| rb | max.1.5 mm | Radius of housing fillet |
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