Deep groove ball bearing 6305 ZZ, double metal shielded, single-row

Deep groove ball bearing 6305 ZZ is a single-row radial bearing with metal shields on both sides (ZZ). It is designed to support rotating shafts and accommodate radial and limited axial loads in industrial and mechanical applications. The double metal shields reduce contamination ingress while maintaining low friction and enabling higher running speeds compared with open bearings. This model is commonly used where a balance of protection, service life and moderate maintenance requirements is needed.

Advantages

The double metal shields provide effective protection against dust and light contamination without contact with the inner ring, which helps keep friction low. The single-row deep groove geometry offers reliable radial load capacity and the ability to take small axial loads in both directions. Construction from hardened steel ensures dimensional stability and wear resistance for continuous operation. The sealed design allows for longer service intervals in environments where light contamination or limited lubrication access is present.

Suitable for

• Electric motors and motor shafts
• Gearboxes and transmission assemblies
• Conveyor rollers and material handling equipment
• Pumps, fans and blowers with moderate contamination levels
• General industrial machinery requiring low-friction sealed bearings

Key specifications

• Bearing type: single-row deep groove ball bearing
• Shielding: double metal shields on both sides (non-contact)
• Load capability: supports radial loads and limited axial loads in both directions
• Design feature: deep groove raceways for stability at radial and axial loading
• Material: hardened bearing steel for rolling elements and rings
• Friction characteristics: low friction due to non-contact metal shields and precise internal clearance
• Typical operating use: moderate-speed rotating applications

How to use

Select a bearing with correct bore and outer diameter matched to the shaft and housing dimensions. Mount the bearing using appropriate press-fit or interference-fit procedures to avoid introducing axial or radial preload; apply force to the ring that is being fitted to prevent damage to rolling elements. Ensure correct lubrication before commissioning — the bearing may be supplied with factory grease or require re-lubrication depending on source. During installation, avoid exposing the inner race to contaminants and follow alignment and shaft tolerance recommendations for the machine to maintain bearing life.

Usage recommendations

For best performance, use appropriate grease compatible with bearing steel and operating temperature, perform periodic inspections for noise or increased running temperature, and replace bearings showing corrosion, pitting or excessive wear. In high-contamination or wet environments consider bearings with contact seals (LLU/2RS) or additional external protection.