6304-ZNR
6300 Series Snap Ring Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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6304-ZNR Bearing Product Overview & Core Advantages
The 6304-ZNR is a single row deep groove ball bearing engineered for exceptional performance in demanding applications. Its key advantage lies in the snap ring groove on its outer ring, which enables secure axial positioning within a housing without requiring complex machining or additional components. This metric bearing is constructed from high-grade chrome steel, offering reliable radial load capacity and smooth operation. It is pre-lubricated with grease and features integral shields, making it a robust, low-maintenance solution for a wide range of industrial machinery.
6304-ZNR Bearing Model Code Explained, Specifications & Naming Convention
- 6304: Basic model number denoting a single row deep groove ball bearing with a 20mm bore, 52mm OD, and 15mm width.
- Z: Signifies that one side of the bearing is equipped with a shield. This protects the internal components from large contaminants while minimizing friction.
- NR: Indicates that the outer ring features a snap ring groove. This allows for a secure, space-saving fit in the housing, simplifying assembly and enhancing axial stability.
6304-ZNR Bearing Structural Features & Performance Benefits
Snap Ring Groove for Axial Location: The integrated snap ring groove on the outer ring provides a positive axial locating feature. This eliminates the need for complex housing shoulders or lock nuts, reducing design complexity, assembly time, and overall system cost.
Robust Load Handling: As a deep groove ball bearing, it is primarily designed to support significant radial loads. The optimized raceway geometry and high-quality chrome steel construction ensure reliable performance under dynamic and static conditions.
Sealed and Pre-Lubricated for Longevity: The shielded (Z) design protects the bearing's interior from coarse contaminants. Combined with factory-applied grease lubrication, this creates a sealed-for-life unit that requires minimal maintenance, ideal for applications where re-lubrication is difficult.
Precision and Material Quality: Manufactured to P0 (Normal) tolerance class with a standard CN radial internal clearance, it ensures consistent and reliable operation. The stainless steel cage provides durability and is suitable for the specified temperature range.
6304-ZNR Bearing Typical Application Areas
The 6304-ZNR is versatile and is commonly specified in:
- Electric Motors and Gearboxes for axial positioning of rotor assemblies.
- Industrial Pumps and Fans where secure housing location is critical.
- Material Handling Equipment such as conveyor rollers.
- Agricultural Machinery and other robust equipment requiring reliable, low-maintenance ball bearings.
