306SZZ
200, 300 & 6400 Series Industrial Single Row Deep Groove Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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306SZZ Bearing Product Overview & Core Advantages
The 306SZZ is a single row deep groove ball bearing designed for reliable performance in demanding applications. Engineered with metric dimensions and manufactured to ABEC 1 | ISO P0 tolerance standards, this bearing delivers consistent precision. Its key advantage lies in the integrated shields (ZZ) which provide effective contaminant protection while maintaining low friction, making it suitable for applications requiring radial load capacity and moderate speeds. The bearing's construction from chrome steel throughout ensures durability and consistent operation across a temperature range of -30° to 120 °C.
306SZZ Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 306 | Standard bearing designation indicating a 30mm bore, 72mm OD, and 19mm width. |
| S | Indicates the bearing is manufactured with chrome steel rings, balls, and cage. |
| ZZ | Denotes shielded on both sides, providing non-contact protection against contaminants while allowing for higher limiting speeds compared to contact seals. |
306SZZ Bearing Structural Features & Performance Benefits
- Robust Single Row Design: The deep groove raceway and optimized geometry enable efficient handling of radial loads (dynamic: 6677 lbf / static: 4856 lbf) and moderate axial loads in both directions.
- Shielded Protection: The non-contact steel shields (ZZ) retain lubrication and exclude contaminants, enhancing bearing service life without significantly increasing friction or operating temperature.
- High-Speed Capability: The all-steel construction and shielded design contribute to a limiting speed of 11,000 rpm, making it suitable for various motor and drive applications.
- Precision & Consistency: Manufactured to ABEC 1 | ISO P0 tolerance class with a standard CN radial internal clearance, ensuring reliable performance and interchangeability.
- Material Integrity: Constructed entirely from chrome steel (rings, balls, cage), providing high hardness, wear resistance, and dimensional stability.
306SZZ Bearing Typical Application Areas
- Electric Motors: Ideal for main shafts and auxiliary drives in small to medium-sized AC/DC motors.
- Gearboxes and Transmissions: Supports shafts in industrial gearboxes requiring radial load support and moderate speeds.
- Pumps and Compressors: Used in various fluid handling equipment where contaminant exclusion is critical.
- Material Handling Equipment: Conveyor rollers, pulleys, and other machinery components.
- General Industrial Machinery: A versatile choice for applications demanding a balance of load capacity, speed, and protection.
