Ball Bearing 627 ZZ – Single Row Deep Groove, Double Shielded (No brand)

Single-row deep groove ball bearing 627 ZZ is a compact radial bearing with metal shields on both sides to limit entry of dust and retain lubricant. This double-shielded design provides smooth rotation with low friction and is suitable for applications that require a small, reliable bearing for continuous or intermittent rotational motion. The bearing's dimensions and construction make it a common choice where space is limited and where protection against moderate contamination is required without the need for full sealing.

Advantages

The double metal shields (ZZ) reduce the risk of contamination while allowing lower friction than fully sealed variants, helping to maintain performance and extend service intervals. The single-row deep groove geometry supports radial loads and some axial loads in both directions, offering versatility in compact assemblies. Its standardized dimensions and simple construction make installation and replacement straightforward for a wide range of mechanical and electromechanical devices.

Suitable for

• Small electric motors and fans
• Miniature gearboxes and motorized assemblies
• Household appliances such as mixers, vacuum cleaners, or blenders
• Hobby and DIY projects including RC vehicles, 3D printers, and robotics
• Light-duty rotating shafts and pulleys where compact bearings are required

Key specifications

• Bearing type: single-row deep groove ball bearing
• Shielding: double metal shields on both sides (ZZ)
• Load capability: designed primarily for radial loads; can accommodate limited axial loads in both directions
• Friction: low internal friction for smooth rotation
• Lubrication: pre-lubricated with grease suitable for moderate contamination environments
• Installation: press-fit inner or outer ring depending on application; standard bore and outer diameter for its series

How to use

Install the bearing ensuring correct alignment of shaft and housing to avoid misalignment stresses. Use appropriate press-fit tools or fixtures to apply force only to the ring being pressed to prevent damaging the raceways or seals. The bearing is supplied with grease and the metal shields retain lubricant while permitting some air exchange; no immediate relubrication is required for typical light-duty applications. Monitor operating temperature and noise during initial run-in to verify correct installation.

Usage recommendations

For optimal service life, avoid exposing the bearing to heavy contamination or high-pressure washdowns. Select the 627 ZZ bearing for applications where low friction and compact dimensions are priorities, and consider fully sealed or higher protection bearings if operating in wet or highly contaminated environments. Periodically check for unusual noise or increased play and replace the bearing if wear is detected.