K 33X47X22 (NEUTRAL) 33x47x22 mm - Needle Roller and Cage Assembly

Technical Specifications - K 33X47X22 (NEUTRAL)

The dimensions refer to the nominal envelope of the needle roller and cage assembly.

Since the product is supplied as NEUTRAL, manufacturer-specific dynamic and static load ratings, limiting speed, cage material, mass and accuracy class cannot be reliably assigned without additional documentation.

These parameters are therefore not included.

What Does K 33X47X22 (NEUTRAL) Mean?

K - Needle Roller and Cage Assembly

The letter K identifies a needle roller and cage assembly.

This bearing design consists of cylindrical needle rollers arranged and retained within a cage.

Unlike complete needle roller bearings, a K-type assembly does not include an inner or outer bearing ring.

The shaft and housing must provide the required hardened and accurately finished raceway surfaces.

This construction enables a compact radial bearing arrangement where separate bearing rings are unnecessary.

33 - Nominal Inside Diameter

The number 33 identifies the nominal inside diameter of the needle roller and cage assembly, expressed in millimetres.

It does not represent the bore of an inner bearing ring because the assembly has no inner ring.

The actual shaft diameter and required operating clearance must be determined according to the relevant bearing tolerances and application requirements.

47 - Nominal Outside Diameter

The number 47 identifies the nominal outside diameter of the needle roller and cage assembly.

Since the product has no outer bearing ring, the surrounding housing bore must serve as the outer raceway.

The housing raceway must meet the required dimensional accuracy, hardness and surface finish.

22 - Assembly Width

The number 22 specifies the nominal width of the needle roller and cage assembly.

This dimension determines the axial space occupied by the assembly and is relevant to the available roller contact length.

NEUTRAL - Unbranded Product

NEUTRAL means that the product is supplied without an identified manufacturer's brand.

It is not the name of a bearing manufacturer, an accuracy class or a special bearing performance designation.

The product must not automatically be attributed to SKF, INA, FAG, NSK, NTN, KOYO or another manufacturer.

Manufacturer-specific load ratings and performance characteristics must not be transferred to the unbranded version solely because the dimensions are identical.

Construction and Operating Principle

Needle Rollers

The rolling elements in K 33X47X22 are needle rollers, characterized by their relatively small diameter and elongated cylindrical shape.

During operation, the rollers move between the shaft raceway and the housing raceway.

The line contact between the rollers and raceway surfaces enables the assembly to accommodate radial loads in a compact installation space.

Cage

The cage maintains the correct spacing between the needle rollers and guides them during operation.

It reduces direct contact between adjacent rollers and helps maintain their correct arrangement.

The cage material of the exact NEUTRAL version has not been confirmed.

It should not be assumed to be steel, brass or polymer without checking the specific product documentation.

No Inner Bearing Ring

K 33X47X22 does not contain an inner bearing ring.

The shaft surface therefore acts directly as the inner raceway.

The shaft must have appropriate hardness, dimensional accuracy, roundness and surface finish.

A conventional untreated shaft surface may not be suitable for direct contact with needle rollers.

No Outer Bearing Ring

The assembly also has no outer bearing ring.

The housing bore provides the outer raceway.

This surface must be manufactured to the required tolerances and material specifications.

The absence of bearing rings allows a compact design but places additional requirements on the surrounding machine components.

Radial Load Transmission

K 33X47X22 is designed primarily to accommodate radial forces acting perpendicular to the shaft axis.

Loads are transmitted through the needle rollers between the shaft and housing raceways.

The assembly is not intended to independently accommodate axial loads or locate the shaft axially.

Where axial forces are present, a separate axial locating arrangement is required.

K 33X47X22 vs Other Needle Roller Bearing Designs

K-Type Assembly vs Needle Roller Bearing with Outer Ring

A K-type needle roller assembly requires appropriately prepared raceways in the surrounding machine components.

It cannot automatically replace a complete needle roller bearing with integral bearing rings.

K 33X47X22 NEUTRAL vs Branded Versions

Needle roller and cage assemblies with nominal dimensions of 33x47x22 mm may also be offered by identified bearing manufacturers.

However, matching dimensions do not guarantee identical:

• Dynamic and static load ratings.

• Number and geometry of needle rollers.

• Cage design and material.

• Dimensional tolerances.

• Accuracy characteristics.

• Permissible operating speed.

Before replacing a branded component with an unbranded version, the technical requirements of the application must be checked.

Alternative Designations and Reference Numbers

The product may appear under the following notation variants:

• K 33X47X22 (NEUTRAL)

• K 33X47X22

• K33X47X22

• K 33x47x22

• K33-47-22

• Needle roller and cage assembly K 33X47X22

• Needle roller bearing assembly 33x47x22 mm

These are alternative search and identification formats, not confirmed OEM cross-reference numbers.

The designation K 33X47X22 may be used by different suppliers. However, identical nominal dimensions do not establish complete technical interchangeability.

Bearing Selection and Interchangeability

Before purchasing K 33X47X22 (NEUTRAL), verify:

1. Complete product designation K 33X47X22.

2. Nominal inside diameter of 33 mm.

3. Nominal outside diameter of 47 mm.

4. Assembly width of 22 mm.

5. Compatibility with the shaft and housing dimensions.

6. Raceway hardness and surface finish.

7. Required radial load capacity.

8. Operating speed.

9. Lubrication conditions.

10. Cage material, where relevant.

11. Operating temperature and environmental conditions.

12. Required tolerances and operating clearance.

Matching dimensions of 33x47x22 mm do not automatically guarantee complete interchangeability.

The internal design, needle roller geometry, cage construction and manufacturing tolerances may differ between suppliers.

Important Information About Shaft and Housing Dimensions

For K-type needle roller and cage assemblies, the nominal inside diameter of 33 mm does not mean that every shaft measuring exactly 33 mm will provide the correct operating clearance.

The actual shaft and housing raceway dimensions must be selected according to the relevant tolerances and the required operating clearance.

Incorrect raceway dimensions may cause excessive friction, insufficient clearance or premature wear.

Applications of K 33X47X22

K-type needle roller and cage assemblies are used in rotating mechanisms where radial loads must be supported without separate bearing rings.

Typical applications for this construction include:

• Shaft and axle support arrangements.

• Gear transmission mechanisms.

• Rotating industrial machine components.

• Compact radial bearing arrangements.

• Mechanical assemblies with raceways integrated into the shaft and housing.

These are typical applications of needle roller and cage assemblies, not confirmed OEM applications of the exact unbranded K 33X47X22 product.

The assembly is suitable only where the surrounding components provide the required raceway properties.

Installation and Operating Recommendations

Raceway Preparation

Before installation, thoroughly clean the shaft and housing raceway surfaces.

Check their dimensional accuracy, hardness, roundness and surface finish.

Do not install the assembly on damaged, corroded or unsuitable raceway surfaces.

Assembly Installation

Install the needle roller and cage assembly carefully to avoid deformation of the cage.

Do not strike the needle rollers directly or apply mounting forces that could damage the rolling surfaces.

Ensure correct alignment when inserting the shaft into the assembly.

Operating Clearance

The operating clearance depends on the dimensions of the shaft and housing raceways, as well as the dimensional characteristics of the needle roller assembly.

Correct clearance must be established before operation.

Excessively small clearance may cause overheating or seizure, while excessive clearance may lead to vibration and uneven load distribution.

Lubrication

The assembly requires suitable lubrication.

Oil or grease selection must account for radial load, rotational speed, operating temperature and environmental conditions.

Because the assembly has no integral seals, contamination protection must be provided by the surrounding machine design.

Storage

Store the product in a clean, dry environment.

Protect it against moisture, dust, corrosion and mechanical damage.

FAQ - K 33X47X22 (NEUTRAL)

1. What are the dimensions of K 33X47X22?

The needle roller and cage assembly has a nominal inside diameter of 33 mm, an outside diameter of 47 mm and a width of 22 mm.

2. What does K mean in the bearing designation?

K identifies a needle roller and cage assembly without inner or outer bearing rings.

3. What does NEUTRAL mean?

NEUTRAL means the product is unbranded and has no specified manufacturer's brand. It is not a bearing manufacturer or accuracy class.

4. Does K 33X47X22 have an inner ring?

No. The needle rollers operate directly on an appropriately prepared shaft raceway.

5. Does K 33X47X22 have an outer ring?

No. The outer raceway must be provided by the appropriately manufactured housing bore.

6. Can K 33X47X22 accommodate axial loads?

It is not designed to independently accommodate axial loads. Its primary function is to support radial loading.

7. Can K 33X47X22 NEUTRAL replace a branded needle roller assembly?

Replacement may be possible after confirming dimensional tolerances, load ratings, cage design and operating conditions. Matching nominal dimensions alone are insufficient.

8. Does K 33X47X22 require lubrication?

Yes. Appropriate lubrication must be provided to protect the needle rollers and raceway surfaces against friction and wear.

K 33X47X22 (NEUTRAL) - Key Technical Information

K 33X47X22 (NEUTRAL) is an unbranded needle roller and cage assembly measuring 33x47x22 mm. The K designation identifies a cage-guided needle roller assembly without inner or outer bearing rings, while NEUTRAL indicates no specified manufacturer. Designed for radial loads, it requires accurately manufactured shaft and housing raceways, appropriate operating clearance and suitable lubrication.

The K 33X47X22 (NEUTRAL) 33x47x22 mm needle roller and cage assembly is offered by simmering.pl, a specialist supplier of rolling bearings, needle roller assemblies and industrial mechanical components.

TG Ersatzteile Polska Sp. z o.o. operates a warehouse in Lublin, Poland, serving industrial companies, workshops, engineering businesses and maintenance departments.

Products are shipped from stock in Poland, with shipping options available throughout Europe and worldwide.