Deep groove ball bearing 6305 ZZ, shielded on both sides, single-row radial bearing

Single-row deep groove ball bearing 6305 ZZ is a standard radial bearing with metal shields on both sides (ZZ) designed to support radial loads in rotating assemblies. With a single row of balls and continuous raceways, this bearing provides reliable shaft guidance and reduces friction in applications with moderate speeds. The metal shields protect internal components from larger particles and splashed contaminants while maintaining low friction and enabling sealed-like performance without contact seals.

Advantages

The 6305 ZZ bearing combines a compact, single-row design with metal shields that limit contamination and retain lubricant. Its deep groove geometry supports radial loads and moderate axial loads in both directions without additional thrust bearings. The metal shields are non-contact, which helps keep rotational friction low and extends service life in many industrial applications. Standardized dimensions and mounting practices make this bearing compatible with common housings and shafts.

Suitable for

• Electric motors and generators
• Pumps and compressors
• Gearboxes and reducers
• Conveyors and rotating shafts in industrial machinery
• Fans and blowers

Key specifications

• Bearing type: single-row deep groove ball bearing
• Shielding: metal shields on both sides (ZZ), non-contact
• Load direction: primarily radial, limited axial in both directions
• Typical operating speed: suitable for moderate rotational speeds (manufacturer-dependent)
• Mounting: press fit on shaft or housing as per standard bearing practice
• Lubrication: factory-packed grease; re-lubrication possible depending on application
• Material: bearing steel rings and balls, metal shields

How to use

Select the 6305 ZZ bearing according to shaft diameter and housing bore matching standard dimensions. Ensure shaft and housing tolerances meet recommended fits and that surfaces are clean and free of burrs. Install the bearing using proper tools to apply load only to the ring being fitted (inner ring for shaft fit, outer ring for housing fit) to avoid ring or ball damage. Verify that lubrication is appropriate for operating temperature and speed; if additional sealing is required for heavy contamination or wet environments, consider bearings with contact seals or external sealing arrangements.

Usage recommendations

For reliable performance, avoid hammering the bearing during installation, maintain correct axial and radial fits, and monitor operating temperature and vibration. Replace the bearing if shields are damaged, excessive play develops, or noise increases. For heavy contamination, moisture, or high-speed applications, choose a contact-sealed or differently specified bearing variant.