Dimensions

6302-2Z Deep Groove Ball Bearing with Seals/Shields: Precision Engineering for Demanding Applications

Technical Overview

The 6302-2Z deep groove ball bearing represents a significant advancement in sealed bearing technology, combining robust performance with exceptional operational efficiency. Engineered for applications requiring extended service life and minimal maintenance, this bearing features integral sealing solutions that outperform conventional open-type bearings in harsh operating environments.

Core Technical Advantages

• Advanced Sealing Architecture:
  Dual metal shields (2Z designation) create a physical barrier against particulate ingress while retaining lubrication. This proprietary sealing configuration reduces lubricant migration by 72% compared to standard shielded bearings (based on ASTM F2234 testing protocols).

• Optimized Raceway Geometry:
  Precision-ground raceways with controlled radial clearance (C3 standard) enable bidirectional load capacity while maintaining optimal stress distribution. The design accommodates:

• Radial loads up to 12.8 kN (dynamic) / 6.55 kN (static)

• Axial loads up to 40% of radial capacity

• High-Speed Performance:
  Featuring grade G10 silicon nitride balls and ultra-clean steel components, the 6302-2Z achieves:

• Limiting speeds of 14,000 rpm (grease-lubricated)

• 18 lower friction torque vs. conventional sealed bearings

• Noise levels <30 dB(A) at 6,000 rpm

Dimensional Specifications

| Parameter | Value | Tolerance | |---------------------|-------------|-------------| | Bore Diameter (d) | 15 mm | ISO 492:2014| | Outside Diameter (D)| 42 mm | Class 0 | | Width (B) | 13 mm | ±0.2 mm | | Dynamic Load Rating | 12.8 kN | ISO 281:2007| | Static Load Rating | 6.55 kN | ISO 76:2006 |

Operational Characteristics

1. Lubrication & Maintenance

• Factory-preloaded with high-temperature lithium complex grease (operating range: -40°C to +150°C)
• Relubrication interval extended by 4-5X compared to open bearings
• Shield design prevents lubricant washout in wet environments

2. Material Science

• Bearing rings: Vacuum-degassed ASTM 52100 steel
• Rolling elements available
• Shield material: Cold-rolled steel with zinc-nickel coating

Industrial Applications

1. Electric Motors:

• HVAC systems
• Industrial pumps
• EV traction motors

1. Automotive Systems:

• Alternators
• Transmission idlers
• Wheel hub assemblies

1. Precision Machinery:

• Medical imaging equipment
• Semiconductor handling robots
• CNC spindle backups

1. Renewable Energy:

• Wind turbine yaw systems
• Solar tracking mechanisms

Comparative Advantages

• Service Life Enhancement: 3.8X MTBF improvement over standard shielded bearings in contaminated environments (ISO 281:2007 L10 calculations)
• Energy Efficiency: 15-22% reduction in consumption for continuous operation systems
• Installation Flexibility:
• Permissible misalignment: ≤0.5°
• Thermal expansion compensation: 0.2 mm axial

• Cost Efficiency: Reduced total ownership cost through:
  ▶︎ 65% lower maintenance requirements
  ▶︎ 40 intervals
• Environmental Resistance: IP54-equivalent protection rating
• Certification Compliance:
• ISO 9001:2015 manufacturing
• REACH/SVHC compliant materials
• RoHS 3 (2015/863/EU)

TKD Information

• Title: 6302-2Z Sealed Deep Groove Ball Bearing | High-Speed Low-Maintenance Solution
• Keywords:
• c
• 15mm bore bearings
• Low friction bearings
• High speed bearings
• Maintenance-free bearings
• Industrial bearing solutions
• Description: Professional-grade 6302-2Z sealed deep groove ball bearings offering exceptional speed capabilities, bidirectional load capacity, and extended service life. Ideal for electric motors, automotive systems, and precision machinery requiring reliable low-maintenance operation.