NSK 608 8x22x7 mm - Deep Groove Ball Bearing

NSK 608 8x22x7 mm - Deep Groove Ball Bearing

NSK 608 8x22x7 mm is a single-row deep groove ball bearing manufactured by NSK. It has an 8 mm bore diameter, 22 mm outside diameter and 7 mm width. The designation 608 without an additional suffix identifies the basic bearing version without shields or seals specified in the product designation. It is a compact deep groove ball bearing in the 608 size series.

Technical data

What does NSK 608 mean?

The designation 608 identifies a single-row deep groove ball bearing with principal dimensions of 8x22x7 mm.

The dimensions are:

• 8 mm - bore diameter

• 22 mm - outside diameter

• 7 mm - bearing width

The absence of an additional suffix is important for correct product identification. Bearings designated 608, 608ZZ, 608DDU or 608VV should not be treated as identical simply because their principal dimensions are the same.

NSK 608 construction

NSK 608 is a single-row deep groove ball bearing.

Its basic construction consists of:

• inner ring

• outer ring

• balls

• cage

The deep raceway grooves of the inner and outer rings work with the balls to provide a bearing design intended primarily for radial loads.

Deep groove ball bearings can also accommodate axial loads in both directions within the capabilities of their design and actual operating conditions.

The 608 designation specified for this product does not contain a suffix identifying shields or seals on both sides.

Alternative designations and search references

Natural reference formats for this product include:

• NSK 608

• 608 NSK

• NSK 608 8x22x7

• NSK 608 8x22x7 mm

• 608 8x22x7 NSK

• NSK 608 bearing

• 608 bearing NSK

• NSK 608 deep groove ball bearing

• 608 deep groove ball bearing 8x22x7 mm

These formats can help identify the basic NSK 608 bearing. Any suffix present on the original bearing or in the machine documentation must also be considered.

NSK 608 vs 608ZZ, 608DDU and 608VV

The NSK 608 family includes different closure variants. The principal dimensions can remain 8x22x7 mm while the bearing closure design differs.

608 - basic designation without a suffix specifying shields or seals on both sides.

608ZZ - version with metal shields on both sides.

608DDU - version with contact seals on both sides.

608VV - version with non-contact seals on both sides.

These variants should not be considered automatically interchangeable. Closure design affects contamination protection, lubricant retention, friction and other operating characteristics.

The complete bearing designation should therefore be checked before selecting a replacement.

How to select the correct NSK 608 bearing

Before purchasing or replacing NSK 608, verify:

• manufacturer

• complete bearing designation

• dimensions 8x22x7 mm

• required open, shielded or sealed version

• required internal clearance

• required accuracy class

• rotational speed

• radial load

• axial load

• operating temperature

• lubrication conditions

• environmental conditions

• requirements of the specific application

Identical 8x22x7 mm dimensions alone are not sufficient to confirm complete technical interchangeability.

The complete designation and all relevant suffixes should be compared.

Applications

NSK 608 belongs to the compact range of deep groove ball bearings. This bearing design is suitable for rotating assemblies requiring small dimensions and the ability to accommodate primarily radial loads together with axial loads within the capabilities of the bearing design.

The NSK 608 designation alone does not confirm installation in a particular machine, motor, roller, power tool or other equipment.

For replacement purposes, the equipment documentation and complete designation of the original bearing should be checked.

Installation and operation

During installation, keep the NSK 608 bearing, shaft, housing and installation tools clean.

If a bearing ring is installed with an interference fit, the mounting force should be applied directly to that ring. Mounting force should not be transmitted through the balls and raceways.

For an open bearing, lubrication and protection against contamination should be appropriate for the bearing arrangement and actual operating conditions.

FAQ

What are the dimensions of NSK 608?

NSK 608 has an 8 mm bore diameter, 22 mm outside diameter and 7 mm width. Its dimensions are written as 8x22x7 mm.

What type of bearing is NSK 608?

NSK 608 is a single-row deep groove ball bearing.

Is NSK 608 an open bearing?

The 608 designation without an additional suffix specifying shields or seals identifies the basic open version.

Is NSK 608 the same as NSK 608ZZ?

No. Although the principal dimensions can be the same at 8x22x7 mm, NSK 608ZZ is equipped with metal shields on both sides.

What is the difference between NSK 608DDU and 608VV?

In NSK nomenclature, DDU identifies contact seals on both sides, while VV identifies non-contact seals on both sides. These are different bearing configurations and should not automatically be considered equivalent.

Can a 608 bearing from another manufacturer replace NSK 608?

A 608 bearing from another manufacturer may have the same principal dimensions of 8x22x7 mm. However, complete interchangeability requires comparison of the bearing design, closure, internal clearance, accuracy and other parameters required by the application.

Can NSK 608 carry axial loads?

As a deep groove ball bearing, NSK 608 is intended primarily for radial loads, but this bearing design can also accommodate axial loads in both directions within appropriate operating limits.

Does the absence of a suffix matter?

Yes. The absence of a suffix is part of the product identification. NSK 608 should not automatically be replaced by 608ZZ, 608DDU or 608VV without checking the requirements of the bearing arrangement.

NSK 608 8x22x7 mm - key information

NSK 608 is a single-row deep groove ball bearing with dimensions of 8x22x7 mm: 8 mm bore diameter, 22 mm outside diameter and 7 mm width. The 608 designation without an additional closure suffix identifies the basic open version. NSK 608 should not automatically be treated as identical to 608ZZ, 608DDU or 608VV variants.

NSK 608 is available from the specialist industrial supplier simmering.pl, with stock in Poland and worldwide shipping. Assistance with bearing identification and selection is also available.