The N311 ECM is a specific type of cylindrical roller bearing. Here’s a breakdown of its key features and specifications:
1. Bearing Type: Cylindrical Roller Bearing
- Cylindrical roller bearings are designed to handle high radial loads and moderate axial loads. They have high rigidity and are suitable for high-speed applications.
2. Bearing Designation: N311 ECM
- N: Indicates the bearing type. In this case, “N” refers to a cylindrical roller bearing with no flanges on the outer ring, allowing the inner ring to move axially relative to the outer ring.
- 311: This is the size designation. The first digit (“3”) represents the series (medium series), and the last two digits (“11”) indicate the bore diameter. For “11,” the bore diameter is calculated as 11 x 5 = 55 Mm.
- ECM: This suffix indicates specific design features:
- EC: Optimized internal design with more and/or larger rollers, providing higher load capacity.
- M: Indicates the bearing uses brass (copper alloy) cage, which is suitable for high-speed applications and offers better durability.
3. Dimensions:
- Bore Diameter (d): 55 Mm
- Outer Diameter (D): 120 Mm
- Amplada (B): 29 Mm
4. Load Ratings:
- Dynamic Load Rating (C): Typically around 108 Kn (exact value depends on the manufacturer).
- Static Load Rating (C0): Typically around 102 Kn (exact value depends on the manufacturer).
5. Applications:
- Cylindrical roller bearings like the N311 ECM are commonly used in:
- Gearboxes
- Electric motors
- Machine tools
- Industrial machinery
- Applications requiring high radial load capacity and moderate axial displacement.
6. Key Features:
- High radial load capacity
- Suitable for high-speed operations
- Brass cage for durability and high-speed performance
- Allows axial displacement of the shaft relative to the housing
7. Manufacturer Variations:
- The exact specifications (load ratings, tolerances, etc.) may vary slightly depending on the manufacturer (e.g., SKF, NSK, FAG, Timken). Always refer to the manufacturer’s datasheet for precise details.
If you need further details or specific data, let me know!
