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Jun . 09, 2025 07:27 Back to list

Sealed 6306 2RS Bearing with Dimensions OEM Grade

  • Understanding bearing fundamentals and the 6306-2RS specification
  • Decoding technical dimensions through measurement standards
  • Performance characteristics under mechanical stress conditions
  • Material innovations transforming bearing durability
  • Comparative analysis of leading industrial manufacturers
  • Industry-specific application case studies
  • Operational lifespan optimization techniques

<trp-post-container data-trp-post-id='20529'>Sealed 6306 2RS Bearing with Dimensions OEM Grade</trp-post-container>

(6306 2rs bearing)


Essentials of the 6306-2RS Bearing Design

Sealed deep groove ball bearings like the 6306-2RS configuration solve critical contamination challenges in industrial environments. The dual-contact rubber seals (2RS) create an effective barrier against particulate ingress while retaining lubrication. This specific 30mm bore size handles radial loads up to 15.7kN and axial loads reaching 40% of radial capacity - a critical specification for motor applications.

Precision Measurement Standards

Conforming to ISO 15:2017 dimensional standards, the 6306-2RS maintains exacting specifications across global manufacturers. The standardized dimensions include:

  • Bore diameter: 30mm ±0.0025mm tolerance
  • Outer diameter: 72mm within ABEC-1 precision class
  • Width: 19mm with controlled parallelism deviations

Cross-sectional clearance averaging 0.012-0.025mm allows thermal expansion while maintaining operational stability. Production verification includes roundness testing below 0.003mm deviation and radial runout under 0.005mm.

Dynamics Under Operational Stress

The 6306-2RS configuration achieves optimized load distribution through precision-ground raceways generating Hertz contact stresses below 1.8GPa. Accelerated testing reveals:

  • Fatigue life (L10) exceeding 35,000 hours at 3,000rpm
  • Temperature stability maintaining -30°C to +120°C operation
  • Seal friction torque averaging 0.15Nm (30% reduction versus traditional designs)

Advanced retention systems prevent cage resonance below 12,000rpm while retaining grease through centrifugal forces exceeding 5,000G.

Material Science Enhancements

Manufacturers now utilize nitrogen-enriched SAE 52100 chrome steel achieving 62 HRC surface hardness with retained austenite below 15%. Advanced polymer sealing compounds withstand continuous 120°C exposure while maintaining Shore A 70±5 hardness. Industry leaders utilize proprietary treatments:

  • Corrosion-resistant coatings survive 500+ hours salt spray testing
  • Ultra-clean steel processing limiting inclusion sizes below 10μm
  • Hybrid ceramic variants using ZrO₂ balls reducing electrical erosion

Industrial Manufacturer Evaluation

Supplier Load Capacity Vibration (dB) Seal Effectiveness Production Certification
SKF Explorer Dynamic: 28.5kN
Static: 14.6kN		 Z2: 48dB IP55 certified ISO 9001:2015
NTN EH Series Dynamic: 27.1kN
Static: 13.8kN		 Z2: 52dB IP54 certified IATF 16949
NSK EF Dynamic: 26.3kN
Static: 14.2kN		 Z2: 50dB IP52 certified ISO 14001
Timken PowerBelt Dynamic: 28.0kN
Static: 14.9kN		 Z3: 45dB IP55 certified AS9100D

Real-World Operational Cases

Agricultural Processing: Conveyor systems at grain facilities running 6306-2RS bearings achieved 27-month service intervals despite abrasive dust contamination - 86% longer than unsealed alternatives.

EV Thermal Systems: Cooling pump bearings in electric vehicles demonstrated 89% survival rate after 5,000 thermal shock cycles between -40°C and 150°C, validating thermal stability.

Industrial Robotics: Articulated joints in palletizing robots recorded over 12 million positional cycles with maintained ±0.003mm positioning accuracy.

Maximizing 6306-2RS Bearing Service Life

Preventative maintenance protocols extend service intervals beyond standard 8,000-hour predictions. Precision mounting with induction heaters maintaining

  • Clean environments: 2,500 operational hours
  • Moderate contamination: 1,200 operational hours
  • Heavy contamination: 600 operational hours

Proper installation techniques reduce early failures by 68% - critical considerations include shaft interference fits of 0.003-0.008mm and perpendicularity alignment within 0.5° tolerance. Condition monitoring remains essential for predictive replacement before catastrophic failure.


<trp-post-container data-trp-post-id='20529'>Sealed 6306 2RS Bearing with Dimensions OEM Grade</trp-post-container>

(6306 2rs bearing)


FAQS on 6306 2rs bearing

Q: What are the dimensions of a 6306 2RS bearing?

A: The standard dimensions of a 6306 2RS bearing are 30mm inner diameter, 72mm outer diameter, and 19mm width. These deep groove ball bearing measurements follow ISO metric standards. The "6306" defines the size while "2RS" indicates double rubber seals on both sides.

Q: What does the 2RS designation mean in 6306 2RS bearings?

A: The "2RS" in 6306 2RS means the bearing has dual rubber contact seals (RS = Rubber Seal). These seals shield internal components from dust/moisture and retain lubrication. This makes 6306 2RS bearings ideal for contaminated environments unlike open or shielded variants.

Q: How does a 6306 2RS bearing differ from a 6306 ZZ bearing?

A: While both share identical 30x72x19mm dimensions, 6306 2RS uses rubber seals whereas 6306 ZZ features metal shields. Rubber seals (2RS) offer superior contamination protection but slightly higher friction. Metal shields (ZZ) provide minimal friction but less effective sealing for dusty/moist conditions.

Q: What are typical applications for 6306 2RS bearings?

A: Common uses include electric motors, agricultural equipment, conveyor systems, and automotive components. The double rubber seals make them suitable for wet or dirty environments like pumps and gearboxes. Their medium-duty design handles radial and moderate axial loads effectively.

Q: Can I replace a 6306 bearing with a 6306 2RS bearing?

A: Yes, a 6306 2RS can directly replace an unsealed 6306 if sealing is required, provided the housing permits the extra seal thickness. The load ratings remain identical to standard 6306 bearings. Always verify operating temperature limits as rubber seals degrade above 110°C.
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