208 KRR AH04 INA 38.892x80x27.5 mm - Single Row Insert Ball Bearing

Technical Specifications - 208 KRR AH04 INA

Important dimensional clarification: The 27.5 mm dimension refers to the inner ring width, while the outer ring width is 21 mm. These dimensions must be distinguished when checking the available mounting space.

Unlike insert bearings with a spherical outer ring surface, the INA 208-KRR-AH04 has a cylindrical outer ring surface. It must therefore not automatically be treated as a self-aligning insert bearing designed for spherical bearing housings.

Catalog Parameters - INA 208-XL-KRR-AH04

Schaeffler documentation provides the following technical values for the newer 208-XL-KRR-AH04 configuration.

Technical note: These parameters apply to the manufacturer-documented 208-XL-KRR-AH04 variant. They must not automatically be assigned to an older bearing designated 208-KRR-AH04 without confirming the exact configuration.

What Does 208 KRR AH04 INA Mean?

The complete designation identifies the bearing size, sealing arrangement, special bore configuration and manufacturer.

208 - Bearing Size and Construction

The designation 208 identifies the bearing size within a family of single row insert ball bearings.

The construction includes an inner ring, an outer ring, one row of balls and a cage.

Unlike a standard 6208 deep groove ball bearing, this product has a special dimensional configuration and specific mounting characteristics.

KRR - Double-Sided Lip Seals

The KRR designation identifies lip seals of type R fitted on both sides of the bearing.

The sealing arrangement incorporates protective metal components and elastomeric sealing lips operating against corresponding ring surfaces.

The seals help prevent contaminants from entering the bearing and reduce lubricant leakage.

The KRR designation must not automatically be equated with 2RS, 2Z or 2RSH suffixes used in other bearing families.

AH04 - Special Bore Configuration

The AH04 suffix identifies a special bore configuration.

For this bearing, the bore diameter is 38.892 mm, corresponding approximately to 1 17/32 inches.

This non-standard bore dimension is particularly important when selecting a replacement bearing for an existing shaft.

INA 208 KRR AH04 must not be replaced with a bearing having a 40 mm bore without verifying dimensional and construction compatibility.

INA - Manufacturer

INA is a bearing brand belonging to the Schaeffler Group.

The INA product range includes rolling bearings, bearing units, linear motion components and industrial bearing solutions.

The 2..-KRR bearing family includes insert ball bearings with double-sided sealing arrangements and manufacturer-specific ring configurations.

Construction and Operating Principle

Single Row Ball Bearing Construction

The INA 208-KRR-AH04 incorporates a single row of balls running between the inner and outer ring raceways.

The bearing primarily accommodates radial loads.

Due to its raceway geometry, it can also accommodate axial loads in both directions within the limits of its specific design and operating conditions.

Cylindrical Outer Ring Surface

The outer ring has a cylindrical rather than spherical outside surface.

This characteristic directly affects how the bearing fits into its housing.

It must not automatically be considered interchangeable with an insert bearing featuring a spherical outer ring, even when the outside diameters are identical.

A cylindrical outer ring does not provide the angular misalignment compensation associated with a spherical insert bearing operating in a matching spherical housing.

Inner Ring and Mounting Width

The inner ring has a width of 27.5 mm, while the outer ring width is 21 mm.

This difference is important when checking axial installation space and the position of adjacent components.

The complete bearing arrangement must accommodate the actual ring geometry rather than relying solely on the nominal outside diameter.

Seals and Lubrication

The KRR seals provide protection against the ingress of contaminants and help retain lubricant inside the bearing.

The newer 208-XL-KRR-AH04 configuration is documented by Schaeffler as factory lubricated, with lubrication intended for its service life under suitable operating conditions.

However, the exact grease specification and lubrication characteristics of an older 208-KRR-AH04 bearing should not be assumed without confirmation.

Alternative Designations and Reference Numbers

Natural commercial notation variants include:

• 208 KRR AH04 INA

• INA 208 KRR AH04

• 208-KRR-AH04 INA

• INA 208-KRR-AH04

• 208KRRAH04 INA

Related manufacturer designation:

- INA 208-XL-KRR-AH04

The XL designation identifies a newer manufacturer-specific configuration and should not be omitted when comparing catalog specifications.

Confirmed OEM References

Schaeffler agricultural application documentation associates INA 208-KRR-AH04 with the following John Deere reference numbers:

• JD8524

• S15039

These references relate to agricultural machinery power transmission applications, including gearbox assemblies.

Compatibility must be checked against the parts catalog for the specific machine and its production version.

The OEM references should not be interpreted as confirmation that the bearing fits every John Deere machine.

INA 208-KRR-AH04 vs Other Bearing Variants

208-KRR-AH04 vs 208-XL-KRR-AH04

Both designations refer to closely related INA bearing configurations.

Detailed catalog specifications are available for the newer XL version.

Before using the XL variant as a replacement, verify dimensional compatibility, seal construction, load ratings and application requirements.

The presence of the XL suffix must be taken into account when identifying the exact bearing.

208-KRR-AH04 vs Standard 6208

A standard 6208 deep groove ball bearing has a nominal bore diameter of 40 mm.

The INA 208-KRR-AH04 has a special bore diameter of 38.892 mm.

The bearings also differ in width and construction details.

They are not direct dimensional substitutes.

Cylindrical vs Spherical Outer Ring

Insert bearings with spherical outer rings are intended for corresponding spherical housing seats, allowing limited angular alignment within the housing arrangement.

The INA 208-KRR-AH04 has a cylindrical outer ring.

Its mounting requirements are therefore different, and a spherical outer ring bearing must not be substituted solely on the basis of matching bore and outside diameters.

Bearing Selection and Interchangeability

Before purchasing or replacing INA 208-KRR-AH04, verify:

1. Complete INA manufacturer designation.

2. Bore diameter of 38.892 mm.

3. Outside diameter of 80 mm.

4. Inner ring width of 27.5 mm.

5. Outer ring width of 21 mm.

6. Cylindrical outer ring surface.

7. Double-sided KRR sealing arrangement.

8. Required shaft fit.

9. Housing bore geometry.

10. Dynamic and static load ratings of the exact bearing configuration.

11. Permissible operating speed.

12. Operating temperature.

13. Lubrication requirements.

14. Axial positioning and mounting arrangement.

15. OEM reference number, where applicable.

Identical outside diameters do not guarantee bearing interchangeability.

The special AH04 bore, different ring widths and cylindrical outer ring surface are critical characteristics.

A replacement must be selected according to the complete bearing specification and the requirements of the machine.

Applications

Manufacturer-Documented Application References

Schaeffler agricultural bearing documentation identifies INA 208-KRR-AH04 in connection with John Deere reference numbers JD8524 and S15039.

These references relate to agricultural machinery power transmission systems, including gearbox assemblies.

The exact bearing application must be verified against the corresponding equipment parts catalog.

Typical Applications of This Bearing Design

Single row insert ball bearings with cylindrical outer rings may be used in appropriately designed bearing arrangements for industrial and agricultural machinery.

Typical engineering applications of this construction include:

• Machinery bearing assemblies with cylindrical housing seats.

• Agricultural equipment power transmission systems.

• Industrial shaft support arrangements.

• Mechanical assemblies requiring sealed single row ball bearings.

• Replacement applications requiring a special inch-based shaft diameter.

These are typical application categories associated with the bearing design, not confirmed applications of the exact SKU in every machine or assembly.

The bearing must be selected according to the actual shaft dimensions, housing geometry, loads and operating conditions.

Installation, Lubrication and Maintenance

Installation

Install the bearing under clean conditions using appropriate mounting equipment.

Before installation, verify the shaft diameter and housing bore.

The special 38.892 mm bore differs from the standard 40 mm dimension and must be considered when checking the shaft fit.

Mounting force should be applied directly to the bearing ring being installed with an interference fit.

Mounting force must not be transmitted through the balls and raceways.

The KRR seals must be protected against deformation, sharp tools and mechanical damage.

Housing Compatibility

The cylindrical outer ring requires a compatible cylindrical housing seat.

Do not assume compatibility with a standard self-aligning bearing housing designed for a spherical outer ring.

Check the housing dimensions, bearing retention method and axial positioning before assembly.

Lubrication

The bearing features double-sided KRR seals designed to help retain lubricant.

The newer 208-XL-KRR-AH04 variant is documented as factory lubricated.

For older bearing versions, the exact lubricant specification and relubrication requirements should be verified from the relevant manufacturer documentation.

Do not remove or damage the seals unnecessarily.

Storage

Store the bearing in its original protective packaging in a clean, dry environment.

Avoid moisture, contamination, mechanical impact and unnecessary handling before installation.

FAQ - INA 208 KRR AH04

1. What are the dimensions of INA 208 KRR AH04?

The bearing has a bore diameter of 38.892 mm, an outside diameter of 80 mm, an inner ring width of 27.5 mm and an outer ring width of 21 mm.

2. What does KRR mean in INA 208 KRR AH04?

KRR identifies double-sided type R lip seals designed to help protect the bearing against contamination and retain lubricant.

3. What does AH04 mean?

AH04 identifies a special bore configuration. In this bearing, the bore diameter is 38.892 mm, approximately 1 17/32 inches.

4. Is INA 208 KRR AH04 a self-aligning bearing?

It belongs to the insert ball bearing family but features a cylindrical outer ring surface. It must not be assumed to provide the self-aligning function of a spherical outer ring bearing mounted in a matching housing.

5. Can INA 208 KRR AH04 be replaced with a standard 6208 bearing?

Not directly. A standard 6208 bearing has a 40 mm bore and different width dimensions. The construction and mounting requirements also differ.

6. Are 208-KRR-AH04 and 208-XL-KRR-AH04 identical?

They are related INA configurations, but the newer XL variant has its own manufacturer specifications. Compatibility should be confirmed before substitution.

7. Is INA 208 KRR AH04 factory lubricated?

Schaeffler documentation confirms factory lubrication for the newer 208-XL-KRR-AH04 configuration. The exact lubrication specification of an older version should be verified separately.

8. Is INA 208 KRR AH04 used in John Deere machinery?

Schaeffler agricultural application documentation associates this bearing with John Deere reference numbers JD8524 and S15039. Compatibility with a particular machine must be confirmed using its parts catalog.

208 KRR AH04 INA 38.892x80x27.5 mm - Key Technical Information

208 KRR AH04 INA is a single row insert ball bearing manufactured under the INA brand, part of Schaeffler. It has dimensions of 38.892x80x27.5 mm, a cylindrical outer ring and double-sided KRR lip seals. The AH04 suffix identifies its special bore configuration. The outer ring width is 21 mm, making precise shaft and housing compatibility essential.

The 208 KRR AH04 INA bearing is offered by simmering.pl, a specialist supplier of rolling bearings and industrial sealing components.

With warehouse operations in Lublin, Poland, simmering.pl supplies industrial maintenance departments, engineering companies and international B2B customers, offering stock in Poland and worldwide shipping options.