Dimensions

6308-2Z Deep Groove Ball Bearing with Seals/Shields: Precision Engineering for Demanding Applications

Overview

The 6308-2Z Deep Groove Ball Bearing is a high-performance mechanical component designed to deliver reliability, efficiency, and longevity in diverse industrial environments. Engineered with integral seals (2Z denotes dual shields) and optimized geometry, this bearing series combines low-friction operation with exceptional load capacity, making it an ideal solution for applications requiring high rotational speeds, minimal maintenance, and robust contamination resistance.

Technical Specifications

• Bore Diameter: 40 mm
• Outside Diameter: 90 mm
• Width: 23 mm
• Designation: DIN 6308-2Z / ISO 6308-2Z
• Sealing Type: Double-sided metal shields (non-contact)
• Cage Material: Stamped steel (standard) or optional polymer

Key Design Advantages

1. Enhanced Service Life Integral Sealing

The 6308-2Z features dual metal shields that act as a physical barrier against particulate ingress and lubricant leakage. This design:

• Reduces abrasive wear by excluding dust, moisture, and debris.
• Retains grease lubrication for up to 80% longer service intervals compared to open bearings.
• Minimizes relubrication requirements in hard-to-access installations.

2. Optimized for High-Speed, Low-Vibration Operation

Precision-ground raceways and advanced steel heat treatment processes enable:

• Rotational Speed Limits: Up to 9,500 rpm (grease-lubricated).
• Noise Reduction: Vibration levels below Z3 grade (ISO 15242-1).
• Friction Minimization: Torque reduction by 15-20% vs. contact-sealed alternatives.

3. Versatile Load Capacity

The deep groove geometry allows simultaneous accommodation of:

• Radial Loads: Up to 36.5 kN static / 21.8 kN dynamic.**: Bidirectional thrust capacity up to 25% of radial rating.

4. Simplified Installation & Maintenance

• Pre-lubricated with high-temperature lithium complex grease (operating range: -30°C to +120°C).
• Interchangeable with ISO-standard 6308 series bearings.
• No need for external seals in moderate contamination environments.

Industrial Applications

The 6308-2Z excels in scenarios demanding reliability under combined loads and contaminated conditions:

• Electric Motors: HVAC blowers, pump drives, and compressor systems.
• Material Handling: Conveyor rollers, forklift wheel assemblies.
• Automotive: Alternators, transmission idlers, clutch release bearings.
• Agricultural Machinery: Harvesters, seeders, and irrigation pumps.

Maintenance Recommendations

While the 6308-2Z is designed for minimal upkeep, optimal performance requires:

1. Avoiding direct high-pressure washing that could compromise shields.
2. Periodic visual inspection for shield deformation or lubricant leakage.
3. Relubrication only when specified (typically after 15,000+ operating hours).

This bearing represents a cost-effective solution for OEMs and maintenance teams seeking to:

• Reduce unplanned downtime through extended lubrication intervals.
• Lower lifecycle costs via reduced energy consumption (low torque design).
• Simplify inventory management with ISO/DIN cross-compatibility.

TKD Metadata

• Title: 6308-2Z Sealed Deep Groove Ball Bearing | High-Speed, Low-Maintenance Design
• Keywords:
• 6308-2Z bearing
• shielded ball bearings
• high-speed bearings
• low-friction bearings
• industrial bearing solutions
• DIN 6308-2Z specifications
• Description: Discover the 6308-2Z deep groove ball bearing with dual shields—engineered for high rotational speeds, bidirectional load capacity, and extended service life in harsh environments. ISO-compliant dimensions, low maintenance requirements.