SKF 638/8-2Z

SKF 638/8-2Z Deep Groove Ball Bearing

Description

The SKF 638/8-2Z is a high-precision, single-row deep groove ball bearing designed for reliability and long service life. It is versatile and suitable for a wide array of applications, particularly those involving high rotational speeds. This bearing is supplied pre-lubricated and features metal shields on both sides for protection.

Specifications

• Manufacturer: SKF
• Model: 638/8-2Z
• Type: Single Row Deep Groove Ball Bearing
• Bore Diameter (d): 8 mm
• Outside Diameter (D): 16 mm
• Width (B): 5 mm
• Sealing: 2Z – Metal shield on both sides
• Material: Bearing Steel

Label Info

• Brand: SKF Service
• Part Number: 638/8-2Z
• Description: Kogellager (Ball Bearing)

Application

Ideal for use in small electric motors, office machinery, power tools, household appliances, and other applications requiring compact, reliable rotational components.

Country of Origin

Manufactured by SKF, a global company based in Sweden. Specific country of manufacture may vary.

CO2 Impact

By purchasing this pre-owned bearing, you are saving approximately 0.1 kg of CO2, contributing to a more sustainable industrial environment. This saving is equivalent to charging a smartphone 12 times.

Availability

This item is in stock and ready for immediate dispatch. It is a new-old-stock (NOS) item in excellent condition, though the original packaging may show signs of wear. Order now from spareparts2day for expert support and fast delivery.

FAQ

What does the ‘2Z’ suffix in the 638/8-2Z model number signify?

The ‘2Z’ suffix indicates that the bearing is fitted with two metal shields, one on each side. These shields are non-contacting and protect the bearing’s interior from larger solid contaminants without increasing friction, making them suitable for high-speed operation.

Can this bearing be used in a high-moisture environment?

While the ‘2Z’ metal shields offer good protection against dust and debris, they are not a complete seal against moisture or fine particles. For applications with direct exposure to water or high humidity, a bearing with ‘2RS’ (two rubber seals) would be a more suitable choice as rubber seals provide superior protection against liquids.

What type of lubrication is factory-filled in an SKF 638/8-2Z bearing?

SKF bearings with the ‘2Z’ suffix are typically supplied lubricated for life with a high-quality grease. The specific grease type is selected by SKF to be suitable for a wide range of operating conditions and speeds. It is generally not necessary or recommended to re-lubricate these bearings.

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Last Update: Friday, March 13, 2026