Part Number | 31318/DF |
System of Measurement | Metric |
Type | Bearing |
Bearing Type | Roller |
Roller Bearing Type | Tapered |
For Load Direction | Combined |
Construction | Matched |
Seal Type | Open |
Cups Type | Standard |
Bore Dia | 90 mm |
Bore Dia Tolerance | -0.02mm to 0 |
Outer Dia | 190 mm |
Outer Dia Tolerance | -0.03mm to 0 |
Total Width | 93 mm |
Total Width Tolerance | +0.35mm to -0.25mm |
Width Of Inner Rings | 86 mm |
Width Of Inner Rings Tolerance | -0.15mm to 0 |
Width Of Lubrication Groove | 15 mm |
Diameter Of Lubrication Hole | 10 mm |
Chamfer Dimension Inner Ring | min.1 mm |
Chamfer Dimension Outer Ring | min.3 mm |
Ring Material | Chrome Steel |
Roller Material | Chrome Steel |
Cage Material | Steel |
Abutment Diameter Shaft | 110 mm |
Abutment Diameter Housing | 110 mm |
Fillet Radius | max.4 mm |
Reference Speed | 1900 r/min |
Limiting Speed | 3400 r/min |
Dynamic Radial Load | 109350 lbf |
Static Radial Load | 141750 lbf |
Fatigue Load Limit | 15975 lbf |
Lubrication | Required |
Temperature Range | -30° to 110 °C |
ABEC Rating | ABEC-1 |
Radial Clearance | Standard (Available in C3/C4/C5) |
RoHS | Compliant |
REACH | Compliant |
Weight | 25.13 lb |

31318/DF
Design Features of 31318/DF Bearing
31318/DF features pairs of tapered rollers arranged to provide optimized load distribution, enhancing performance in both radial and axial directions. 31318/DF outer dia is 190 mm. Its bore dia is 90 mm. Its design allows for precise adjustment of internal clearance and preload, ensuring improved stability and reliability in high-load applications.
What Benefits Can 31318/DF Bearing Provide?
- Enhanced Load Capacity: Their design allows for improved distribution of loads, enabling them to handle higher radial and axial forces effectively.
- Improved Stability: The precise matching of the bearings ensures consistent performance and stability under varying loads and operating conditions.
- Adjustable Internal Clearance: Users can customize the internal clearance and preload to suit specific application requirements, optimizing performance.
- Reduced Friction: The tapered roller design minimizes friction between moving parts, leading to smoother operation and extended service life.
- Versatile Applications: Suitable for a wide range of applications, from automotive to industrial machinery, due to their adaptability to different load and speed conditions.
What Can 31318/DF Bearing Be Used for?
- Automotive: Utilized in wheel hubs, differentials, and transmission systems to support heavy loads and provide accurate alignment.
- Industrial Machinery: Found in gearboxes, conveyors, and pumps, where they manage both radial and axial loads effectively.
- Aerospace: Employed in aircraft landing gear and other critical components that require high reliability and performance under heavy loads.
- Heavy Equipment: Used in construction and mining machinery to ensure stability and support in harsh operating conditions.
- Railway: Applied in train axle boxes to handle the substantial loads and forces experienced during operation.