SKF 638/8-2Z

SKF 638/8-2Z Deep Groove Ball Bearing

Description

The SKF 638/8-2Z is a versatile and high-performance miniature deep groove ball bearing. It is engineered for applications that require high accuracy and rotational speed. With its robust construction, it can accommodate both radial and axial loads in both directions. The ‘2Z’ suffix indicates that the bearing is equipped with a pressed steel shield on both sides, protecting it from dust and other contaminants while retaining the factory-filled grease.

Specifications

• Manufacturer: SKF
• Type Number: 638/8-2Z
• Category: Miniature Deep Groove Ball Bearing
• Bore Diameter (d): 8 mm
• Outside Diameter (D): 16 mm
• Width (B): 6 mm
• Sealing: 2Z (Shielded on both sides)
• Material: Bearing Steel

Label Info

• Brand: SKF Service
• Model: 638/8-2Z

Application

This bearing is commonly used in small electric motors, robotics, medical instruments, household appliances, and other precision machinery where space is a critical constraint and reliable operation is paramount.

Country of Origin

This product is typically manufactured in Italy by SKF.

CO2 Impact

By purchasing this reused component, you avoid the production of a new one, saving approximately 0.01 kg of CO2. This is equivalent to the energy needed to charge a standard smartphone more than once.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What does the ‘2Z’ suffix signify on this SKF bearing?

The ‘2Z’ (or ZZ) suffix indicates that the bearing is fitted with pressed metal shields on both sides. These shields protect the bearing’s interior from larger contaminants and help retain the grease lubricant, making it maintenance-free.

Is this bearing suitable for high-speed applications?

Yes, deep groove ball bearings like the 638/8-2Z are well-suited for high-speed operation. The metal shields (‘2Z’) create no friction, allowing for higher limiting speeds compared to bearings with contact seals (e.g., ‘2RS’).

Can this bearing be re-lubricated?

No, bearings with ‘2Z’ shields are typically lubricated for life by the manufacturer and are not designed to be re-lubricated. The shields are non-removable without causing damage.

Last Update: Friday, March 13, 2026

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