Technical Specification
The 31318 27318E tapered roller bearing is designed for rigorous conditions with a 90mm bore and 190mm outer diameter. It performs reliably under high loads and speeds, making it suitable for construction, heavy transport, and industrial sectors. Precision-machined surfaces and strict quality control ensure dependable operation.
Designed for high-efficiency rotation and heavy load applications, the 31318 tapered roller bearing is used in gearboxes, mining trucks, and axle assemblies. With advanced manufacturing and strict material selection, DSBR provides bearings with high dimensional accuracy and smooth rotation. This model excels under harsh working conditions, including dust and impact, and is trusted by global clients in automotive and industrial markets. We support customization and private label branding.
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 | 90 mm | Bore diameter |
| D | 190 mm | Outside diameter |
| T | 46.5 mm | Total width |
| d1 | ≈139.88mm | Shoulder diameter of inner ring |
| B | 43 mm | Width of inner ring |
| C | 30 mm | Width of outer ring |
| r1,2 | min.4 mm | Chamfer dimension of inner ring |
| r3,4 | min.3 mm | Chamfer dimension of outer ring |
| a | 57.3 mm | Distance side face to pressure point |

| Abutment dimensions | ||
| da | max.110 mm | Diameter of shaft abutment |
| db | min.105.5 mm | Diameter of shaft abutment |
| Da | min.151 mm | Diameter of housing abutment |
| Da | max.177.5 mm | Diameter of housing abutment |
| Db | min.179 mm | Diameter of housing abutment |
| Ca | min.5 mm | Minimum width of space required in housing on large side face |
| Cb | min.16.5 mm | Minimum width of space required in housing on small side face |
| ra | max.4 mm | Radius of shaft fillet |
| rb | max.3 mm | Radius of housing fillet |
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