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Technical Specification 
.webp "30309 7309E Metric Tapered Roller Bearings")
.webp "diagram of dsbr metric tapered roller bearings (2)")
30309 7309E 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 30309 7309E bearing is ideal for automotive axles, gear reduction units, and industrial transmission systems. With robust construction and heat-treated components, it handles demanding radial and thrust loads with ease.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 | 45 mm | Bore diameter |
| D | 100 mm | Outside diameter |
| T | 27.75 mm | Total width |
| d1 | ≈70.2 mm | Shoulder diameter of inner ring |
| B | 25 mm | Width of inner ring |
| C | 22 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 | 20.75 mm | Distance side face to pressure point |
| Abutment dimensions | ||
| da | max.59 mm | Diameter of shaft abutment |
| db | min.55 mm | Diameter of shaft abutment |
| Da | min.86 mm | Diameter of housing abutment |
| Da | max.92 mm | Diameter of housing abutment |
| Db | min.92 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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