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ఏప్రి . 28, 2025 13:41 Back to list

6304 Bearing - High Load Capacity, C3 Clearance & Z Shield Design

  • Overview of 6304 Bearing Specifications and Industrial Significance
  • Technical Parameters: Load Capacity and Dimensional Precision
  • Performance Advantages Over Standard Deep Groove Bearings
  • Manufacturer Comparison: Durability and Cost Efficiency Analysis
  • Customization Options for Specialized Operational Requirements
  • Implementation Case Studies Across Multiple Industries
  • Optimized Selection Criteria for 6304 Bearing Variants

6304 bearing

(6304 bearing)


Understanding the 6304 Bearing and Its Industrial Relevance

The 6304 bearing
series represents a critical component in rotational systems, featuring 20mm bore diameter and 52mm outer diameter. With dynamic load capacity reaching 15.8kN and maximum rotational speed of 9,500 rpm (oil lubrication), these bearings outperform 60% of similar-sized alternatives in axial load handling. The C3 clearance variant specifically addresses thermal expansion challenges in high-speed applications between 80-120°C operating temperatures.

Technical Specifications and Operational Thresholds

Parameter 6304 Standard 6304 C3 6304 ZZ
Radial Clearance (μm) 8-20 23-43 8-20
Max Speed (Grease) 6,800 rpm 6,200 rpm 6,500 rpm
Noise Level 28 dB 32 dB 26 dB

Engineering Superiority in Design

Advanced manufacturing techniques enable 6304 series bearings to achieve 18% higher fatigue life compared to ISO 281 standards. The Z-type shield variant demonstrates 99.3% particle exclusion efficiency in contaminated environments, while specialized heat treatment creates surface hardness of 60-64 HRC without compromising core toughness.

Market Comparison: Leading Manufacturers

Brand Service Life Price Point Precision Class
SKF 12,000 hrs $$$ ABEC 3
NSK 10,500 hrs $$ ABEC 1
NTN 11,200 hrs $$ ABEC 2

Tailoring Solutions for Specific Applications

Custom configurations include:

  • High-temperature variants (up to 250°C) with special lubricants
  • Corrosion-resistant models with 316L stainless steel
  • Low-torque versions reducing startup friction by 35%

Practical Implementations Across Industries

In automotive alternators, 6304 C3 bearings demonstrate 92% reliability after 100,000 km. Food processing equipment utilizing sealed variants maintains 86% efficiency after 5,000 wash cycles. Industrial pumps equipped with customized 6304 ZZ bearings show 40% longer maintenance intervals compared to standard models.

Selecting Optimal 6304 Bearing Configuration

Proper clearance selection reduces thermal failure risk by 73% in high-speed applications (above 8,000 rpm). For vibration-sensitive environments, the Z-shield variant decreases acoustic emissions by 42% compared to open-type bearings. Hybrid ceramic versions extend service intervals by 2.8x in electrical motors operating above 15,000 rpm.


6304 bearing

(6304 bearing)


FAQS on 6304 bearing

Q: What are the dimensions of a 6304 bearing?

A: The standard 6304 bearing dimensions are 20mm inner diameter, 52mm outer diameter, and 15mm width. These measurements comply with ISO 15:2017 standards. Variations like 6304 C3 or 6304 Z share the same core dimensions.

Q: What does "C3" mean in bearing 6304 C3?

A: The C3 suffix indicates greater internal clearance than standard bearings. This design accommodates thermal expansion in high-speed or high-temperature applications. It's ideal for machinery with frequent temperature fluctuations.

Q: How does 6304 Z bearing differ from open bearings?

A: The 6304 Z features a single metal shield (Z suffix) that prevents dust ingress while retaining lubrication. Unlike open bearings, it requires less maintenance but has slightly higher friction. Suitable for contaminated environments needing basic protection.

Q: What's the load capacity of diameter bearing 6304?

A: A standard 6304 bearing typically handles 15.6kN dynamic load and 10.2kN static load. Radial load capacity decreases slightly in C3 clearance variants. Always verify manufacturer specs for exact performance data.

Q: Can I replace 6304 with 6304-ZZ bearing?

A: Yes, 6304-ZZ (dual shields) can replace 6304 if enhanced contamination protection is needed. Ensure replacement maintains equivalent clearance ratings (C3/normal). Verify axial space for slightly wider shield profile.

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