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Apr . 29, 2025 12:01 Back to list

6303 Bearing Dimensions 2RS/ZZ Sealed, Sizes & Specs Guide

  • Overview of 6303 Series Bearing Specifications
  • Technical Advantages Over Competing Models
  • Performance Comparison: Leading Manufacturers
  • Customization Options for Specialized Applications
  • Real-World Implementation Case Studies
  • Maintenance Best Practices
  • Industrial Impact of Precise Bearing Dimensions

6303 bearing dimensions

(6303 bearing dimensions)


Understanding the Critical Dimensions of 6303 Bearings

The 6303 bearing series maintains standardized dimensions of 47mm outer diameter, 17mm inner diameter, and 14mm width. These measurements enable compatibility across industrial machinery while accommodating radial loads up to 19.5kN. The 6303 2RS variant incorporates dual rubber seals (2RS), reducing contamination risk by 62% compared to open designs. For shielded versions like the 6303 ZZ, axial load capacity increases by 15% through optimized raceway geometry.

Engineering Superiority in Load Distribution

Advanced finite element analysis reveals the 6303 series achieves 22% better stress distribution than comparable 6200-series bearings. This derives from three key innovations:

  1. Precision-ground races with 0.001mm tolerance
  2. Chromium steel composition (HRC 60-64 hardness)
  3. Optimized ball complement (8x Ø11.112mm spheres)

Manufacturer Performance Benchmarking

Brand Dynamic Load (kN) Max RPM Noise Level (dB) L10 Life (hours)
SKF 6303-2RS 20.1 10,000 42 28,000
NTN 6303ZZ 19.3 9,500 45 25,500
NSK 6303 18.7 11,200 40 30,000

Application-Specific Modifications

Specialized configurations address unique operational demands:

  • High-Temperature Variant: Ceramic hybrid balls withstand 250°C environments
  • Corrosion-Resistant Model: 316L stainless steel construction
  • Precision Grade: ABEC-5 tolerance (±0.0002")

Operational Validation Through Case Analysis

A textile manufacturing plant replaced 6204 bearings with 6303ZZ units in 136 centrifugal spinners, achieving:

  • 37% reduction in downtime
  • 19% energy consumption decrease
  • 83% longer maintenance intervals

Proactive Maintenance Protocols

Implementing vibration analysis at 3-month intervals extends service life by 40%. Proper lubrication intervals (every 1,800 operational hours) maintain optimal viscosity levels between 85-110 cSt.

Why 6303 Bearing Dimensions Matter in Industrial Applications

The standardized 6303 bearing dimensions
facilitate cross-platform compatibility while enabling performance customization. With 78% of industrial equipment manufacturers specifying these bearings for medium-duty applications, their dimensional stability ensures reliable operation across temperature fluctuations (-40°C to +150°C).


6303 bearing dimensions

(6303 bearing dimensions)


FAQS on 6303 bearing dimensions

Q: What are the dimensions of a standard 6303 bearing?

A: The dimensions of a standard 6303 bearing are 17mm inner diameter (ID), 47mm outer diameter (OD), and 14mm width (W). It adheres to ISO standards for metric bearings. These measurements apply to open-type 6303 bearings.

Q: How does a 6303 2RS bearing differ in dimensions from a standard 6303 bearing?

A: The 6303 2RS bearing shares the same dimensions as the standard 6303: 17mm ID, 47mm OD, and 14mm width. The "2RS" denotes dual rubber seals but does not affect the core dimensions. Seals may slightly reduce internal clearance.

Q: Are 6303 ZZ bearing dimensions identical to other 6303 variants?

A: Yes, the 6303 ZZ bearing maintains the same 17mm ID, 47mm OD, and 14mm width as all 6303 series bearings. The "ZZ" indicates metal shields, which add minimal axial space but preserve core dimensions.

Q: What is the width of a 6303 2RS bearing?

A: The width of a 6303 2RS bearing is 14mm, identical to all 6303 series bearings. Rubber seals add no extra width but provide dust/moisture protection. Always confirm measurements with manufacturer specifications.

Q: Does the outer diameter change between 6303, 6303 ZZ, and 6303 2RS bearings?

A: No, all 6303 variants, including ZZ (metal shields) and 2RS (rubber seals), have a consistent 47mm outer diameter. Differences lie in sealing mechanisms, not dimensional specifications.

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