Part Number | RNU 304 |
Brand: BearingMaker | Interchangeable With: SKF |
System of Measurement | Metric |
Roller Bearing Type | Cylindrical |
For Load Direction | Combined |
Construction | Single Row |
Inner Ring Type | Without |
Seal Type | Open |
Diameter Under Rollers | 28.5 mm |
Diameter Under Rollers Tolerance | -0.01mm to 0 |
Outer Dia | 52 mm |
Outer Dia Tolerance | -0.013mm to 0 |
Width | 15 mm |
Width Tolerance | -0.12mm to 0 |
Shoulder Dia Outer Ring | 40.55 mm |
Corner Radius(r1,2)(min.) | 1.1 mm |
Ring Material | Chrome Steel |
Roller Material | Chrome Steel |
Cage Material | Brass cage, roller centred |
Dynamic Radial Load | 4612 lbf |
Static Radial Load | 3735 lbf |
Max Speed (X1000 rpm) | 18 |
Lubrication | Grease, Oil |
Temperature Range | -30° to 110 °C |
RoHS | Compliant |
REACH | Compliant |
Weight | 0.11 kg |

RNU 304
Design Features of RNU 304 Bearing
RNU 304 Bearing includes a single row of cylindrical rollers that offer high radial load capacity and efficient performance. RNU 304 outer dia is 52 mm. Its outer dia tolerance is -0.013mm to 0. By eliminating the inner ring, the bearing allows for direct mounting on the shaft, reducing overall weight and enabling a more compact and lightweight design, ideal for applications with space and weight constraints.
What Benefits Can RNU 304 Bearing Provide?
- Space Efficiency: The absence of an inner ring allows for a more compact design, saving space in machinery.
- Lightweight Design: Eliminating the inner ring reduces the overall weight of the bearing.
- Direct Shaft Mounting: Can be mounted directly onto the shaft, simplifying installation.
- High Radial Load Capacity: Supports heavy radial loads effectively.
- Cost Savings: Fewer components result in lower material costs.
- Customizable Shaft Surface: The shaft can be customized to meet specific application requirements, offering greater flexibility.
What Can RNU 304 Bearing Be Used for?
- Industrial Machinery: Used in gearboxes, compressors, and pumps where compactness and direct mounting are essential.
- Automotive Industry: Applied in engines, transmissions, and axles for efficient load support with minimal space requirements.
- Single Row Equipment: Suitable for cranes and excavators where weight and space constraints are critical.
- Electric Motors: Provides reliable radial load support while simplifying the motor’s design.
- Agricultural Machinery: Used in tractors, harvesters, and other equipment requiring durable and space-saving solutions.
- Material Handling: Ideal for conveyors, hoists, and other systems needing compact and lightweight bearings.