1304 ETN9
1300 Series Self Aligning Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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1304 ETN9 Bearing Product Overview & Core Advantages
The 1304 ETN9 is a double row angular contact ball bearing designed for demanding applications requiring high precision and reliability. This metric system bearing features an open design, enabling it to accommodate combined loads—significant radial loads alongside axial loads in both directions. Its compact cross-section and high rigidity, achieved through the double row ball complement, make it an ideal choice for space-constrained, high-performance assemblies. The bearing comes pre-lubricated and is capable of operating at high speeds, with a limiting speed of 18,000 rpm.
1304 ETN9 Bearing Model Code Explained, Specifications & Naming Convention
The model number 1304 ETN9 provides specific technical information:
- 1304: Standard bearing designation indicating a 20mm bore, 52mm outside diameter, and 15mm width.
- E: Signifies an optimized internal design, typically featuring a larger ball complement and modified raceway geometry for increased load capacity.
- TN9: Denotes the cage material and type. The TN9 suffix indicates a cage made from glass fiber reinforced polyamide 66 (Nylon). This cage material is lightweight, contributes to lower friction and higher limiting speeds, and is suitable for high-speed operation.
1304 ETN9 Bearing Structural Features & Performance Benefits
The performance of the 1304 ETN9 is a direct result of its precision engineering and material selection:
- High Rigidity & Load Capacity: The double row construction provides superior radial and axial stiffness, enabling the bearing to handle combined loads effectively and maintain shaft positioning under demanding conditions.
- High-Speed Performance: The lightweight Nylon (TN9) cage reduces centrifugal forces, while the optimized internal geometry minimizes friction and heat generation, allowing for a high limiting speed of 18,000 rpm.
- Precision & Durability: Manufactured from high-grade Chrome Steel for both rings and balls, the bearing offers excellent wear resistance and long service life. The tight dimensional tolerances ensure consistent, high-precision performance.
- Ready-to-Install: The bearing is supplied pre-lubricated, simplifying installation and ensuring immediate operational readiness.
1304 ETN9 Bearing Typical Application Areas
The 1304 ETN9 is engineered for a wide range of industrial applications where precision, speed, and reliability are paramount. Key sectors include:
- Electric Motors and Spindles
- Pumps and Compressors
- Precision Gearboxes
- Material Handling Equipment
- Agricultural Machinery
