The NU315 EM is a type of cylindrical roller bearing. Here’s a breakdown of its designation and key features:
1. NU315 EM Designation:
- NU: Indicates the bearing type. “NU” means it is a cylindrical roller bearing with two flanges on the outer ring and no flanges on the inner ring. This design allows the inner ring to move axially relative to the outer ring, making it suitable for applications with axial displacement.
- 315: Specifies the bearing size. The “315” corresponds to the bore diameter, which is calculated as follows:
- Bore diameter = 15 × 5 = 75 manm (for metric bearings, the last two digits multiplied by 5 give the bore diameter in mm).
- EM: Refers to the internal design and cage material. “EM” typically indicates a machined brass cage (solid brass cage) and optimized internal geometry for higher load capacity and performance.
2. Key Features of NU315 EM:
- High Radial Load Capacity: Cylindrical roller bearings are designed to handle high radial loads due to the line contact between the rollers and raceways.
- Axial Displacement: The NU design allows for axial displacement of the shaft relative to the housing, making it suitable for applications where thermal expansion or misalignment occurs.
- Machined Brass Cage (EM): The brass cage provides high strength, durability, and resistance to high temperatures, making it suitable for demanding applications.
- Precision and Smooth Operation: The optimized internal geometry ensures smooth rotation and reduced friction.
3. Applications:
- Industrial Machinery: Used in gearboxes, pumps, and compressors.
- Electric Motors: Suitable for motor shafts where axial displacement is expected.
- Material Handling Equipment: Conveyors, rollers, and other heavy-duty equipment.
- Steel Mills and Mining: High-load applications in harsh environments.
4. Dimensions (Standard NU315 Bearing):
- Bore Diameter (D): 75 manm
- Dyamèt eksteryè (D): 160 manm
- Lajè (B): 37 manm
- Dynamic Load Rating (C): ~220 kN (approx., varies by manufacturer)
- Static Load Rating (C0): ~240 kN (approx., varies by manufacturer)
5. Mounting and Maintenance:
- Proper mounting and alignment are critical for optimal performance.
- Regular lubrication is required to reduce friction and wear.
- Ensure the bearing is protected from contaminants like dust and moisture.
If you need specific technical details or manufacturer-specific information, let me know!
