HMK4530 NTN 45x55x30 mm - Needle Roller Bearing

HMK4530 NTN 45x55x30 mm - Needle Roller Bearing

HMK4530 NTN 45x55x30 mm is an open drawn cup needle roller bearing with a thin-walled outer ring. It has a 45 mm roller set bore diameter Fw, 55 mm outside diameter and 30 mm width. Its compact radial section of only 5 mm combines minimal installation space with high radial load capacity, making the HMK4530 suitable for compact bearing arrangements where radial space is limited.

Technical data - HMK4530 NTN

What is HMK4530?

HMK4530 is an NTN designation for a drawn cup needle roller bearing with a thin-walled outer ring.

Its principal dimensions are:

Fw = 45 mm

D = 55 mm

C = 30 mm

Complete dimensions:

45x55x30 mm

The HMK series belongs to NTN's family of drawn cup needle roller bearings designed to provide high radial load capacity within a compact radial envelope.

HMK4530 NTN dimensions

The principal catalogue dimensions are:

Fw = 45 mm - roller set bore diameter

D = 55 mm - outside diameter

C = 30 mm - bearing width

Nominal dimensions:

45x55x30 mm

The difference between the outside diameter and roller set bore diameter is only 10 mm, resulting in a radial section of approximately 5 mm per side.

This compact cross-section is one of the principal advantages of drawn cup needle roller bearings.

Drawn cup needle roller bearing

HMK4530 uses long rolling elements with a relatively small diameter, known as needle rollers.

This geometry provides a large contact area between the rolling elements and raceways while maintaining a very compact bearing cross-section.

Drawn cup needle roller bearings are particularly useful where:

• radial installation space is limited

• high radial load capacity is required

• a compact bearing arrangement is necessary

• a conventional bearing with a larger radial section would require excessive space

Thin-walled drawn cup outer ring

A characteristic feature of HMK4530 is its thin-walled, drawn outer ring.

Unlike bearings with conventional machined outer rings, the drawn cup construction allows the radial dimensions of the bearing arrangement to be kept very small.

This makes the design particularly suitable for compact mechanisms where the available space between the shaft and housing is restricted.

Open bearing design

HMK4530 is an open needle roller bearing.

It does not incorporate integral seals on both sides.

Protection against contamination and lubricant retention must therefore be considered as part of the complete bearing arrangement.

The required sealing and lubrication solution depends on the operating environment and machine design.

Load ratings of HMK4530 NTN

According to NTN catalogue data, the basic dynamic load rating is:

Cr = 49,500 N

or:

49.5 kN

The basic static load rating is:

C0r = 90,000 N

or:

90 kN

The high radial load capacity relative to the compact cross-section is one of the characteristic advantages of needle roller bearing technology.

Catalogue load ratings should not be interpreted as the maximum permissible operating load for every application. Bearing life also depends on speed, lubrication, raceway quality, installation conditions, contamination and the characteristics of the applied load.

Limiting speed

NTN specifies the following limiting speeds for HMK4530:

3700 min-1 with grease lubrication

5500 min-1 with oil lubrication

These are catalogue limiting-speed values.

Actual permissible operating speed depends on load, temperature, lubrication conditions, installation and the design of the complete bearing arrangement.

Inner raceway and shaft

Drawn cup needle roller bearings can operate in arrangements where a suitably prepared shaft surface serves directly as the inner raceway for the needle rollers.

This is an important difference compared with conventional complete bearings equipped with a separate, substantial inner ring.

When the shaft itself serves as the raceway, its surface must meet the required specifications for:

• hardness

• surface finish

• dimensional accuracy

• roundness

• raceway geometry

If the shaft cannot provide a suitable raceway, an appropriate inner ring should be considered.

Inner ring for HMK4530

NTN documentation references:

IR40x45x34

as an inner ring associated with this bearing size.

The suitability of an inner ring must always be verified for the specific bearing arrangement, shaft diameter, tolerances and operating conditions.

Using a separate inner ring also changes the shaft dimensions required for the complete bearing assembly.

Radial load capacity

HMK4530 is designed primarily to support radial loads.

The standard drawn cup needle roller bearing construction is not intended to independently locate or support significant axial loads.

If substantial axial forces occur in the application, they should be supported by an appropriately designed additional bearing or thrust element.

CN radial internal clearance

NTN data for HMK4530 specifies:

CN radial internal clearance

The housing bore tolerance, installation conditions and geometry of the surrounding components can influence the final geometry and operating clearance of a thin-walled drawn cup bearing.

Correct housing preparation is therefore particularly important.

HMK4530 vs HMK4525

Both bearings share:

Fw = 45 mm

D = 55 mm

However, their widths differ:

HMK4525 = 45x55x25 mm

HMK4530 = 45x55x30 mm

They should therefore not be considered automatically interchangeable.

HMK4530 vs HMK4540ZWD

HMK4540ZWD belongs to the same general dimensional family with respect to Fw and D but has a greater width:

HMK4530 = 45x55x30 mm

HMK4540ZWD = 45x55x40 mm

Dimensional and construction differences must be considered when selecting a replacement.

HMK4530 and 7E-HMK4530CT

Depending on the NTN catalogue or product database, references associated with this size may include:

HMK4530

and:

7E-HMK4530CT

The complete designation should always be interpreted according to the specific product version and current NTN documentation.

For product identification and dimensional searches, HMK4530 NTN 45x55x30 mm remains an important reference.

Typical applications

Drawn cup needle roller bearings are commonly used in compact mechanical systems where a combination of small radial dimensions and high radial load capacity is required.

Typical application areas for this bearing design may include:

• gearboxes

• mechanical drive systems

• industrial machinery

• production equipment

• agricultural machinery

• compact mechanical assemblies

• mechanisms with restricted radial installation space

These are typical applications of drawn cup needle roller bearings and do not confirm the suitability of HMK4530 for a specific machine.

Alternative designations and search references

The product may also be searched for as:

HMK4530 NTN

NTN HMK4530

HMK 4530 NTN

HMK4530 45x55x30

HMK4530 NTN 45x55x30

NTN HMK4530 45x55x30

HMK4530 bearing

HMK4530 needle bearing

HMK4530 needle roller bearing

NTN HMK4530 needle bearing

45x55x30 needle bearing

45x55x30 needle roller bearing

NTN 45x55x30 bearing

HMK4530 drawn cup bearing

HMK4530 drawn cup needle roller bearing

7E-HMK4530CT

7E-HMK4530CT NTN

The primary product identification is:

HMK4530 NTN 45x55x30 mm

Selection and interchangeability

When selecting HMK4530 or an equivalent bearing, verify:

• bearing design

• Fw diameter 45 mm

• outside diameter 55 mm

• width 30 mm

• drawn cup construction

• open design

• required radial load ratings

• operating speed

• lubrication conditions

• housing bore tolerance

• inner raceway requirements

• operating environment

Matching the 45x55x30 mm dimensions alone does not guarantee complete interchangeability.

The raceway design, housing requirements, load ratings and complete bearing construction must also be considered.

Installation

Drawn cup needle roller bearings require the correct installation procedure because of their thin-walled outer ring.

Particular attention should be paid to:

• cleanliness

• correct housing geometry

• specified housing bore tolerance

• suitable inner raceway

• correct mounting tool

• alignment during press fitting

• appropriate lubrication

The bearing should be pressed into the housing using a suitable mounting tool that distributes the installation force correctly.

Incorrect installation can deform the thin-walled outer ring and adversely affect the operating geometry of the needle rollers.

FAQ - HMK4530 NTN

What are the dimensions of HMK4530 NTN?

HMK4530 has a 45 mm roller set bore diameter Fw, 55 mm outside diameter and 30 mm width. Its nominal dimensions are 45x55x30 mm.

What type of bearing is HMK4530?

HMK4530 is a drawn cup needle roller bearing with a thin-walled outer ring.

Is HMK4530 an open bearing?

Yes. HMK4530 is an open needle roller bearing without integral seals on both sides.

What is the dynamic load rating of HMK4530 NTN?

The basic dynamic load rating Cr is 49.5 kN.

What is the static load rating of HMK4530 NTN?

The basic static load rating C0r is 90 kN.

What is the limiting speed of HMK4530?

NTN specifies a limiting speed of 3700 min-1 with grease lubrication and 5500 min-1 with oil lubrication.

Does HMK4530 require an inner ring?

Not necessarily. A suitably prepared shaft can serve directly as the inner raceway. Where the shaft cannot provide the required raceway characteristics, an appropriate inner ring can be used. NTN documentation references IR40x45x34 for this bearing size.

Can HMK4530 support axial loads?

HMK4530 is primarily designed for radial loads. Significant axial loads should be supported by an appropriately designed additional bearing or thrust element.

Is any 45x55x30 bearing interchangeable with HMK4530?

No. Dimensions alone do not guarantee interchangeability. Bearing construction, raceway requirements, housing tolerances, load ratings and operating conditions must also be checked.

HMK4530 NTN - key information

HMK4530 NTN is an open drawn cup needle roller bearing with dimensions 45x55x30 mm. Its compact thin-walled design provides high radial load capacity within a small radial installation space. NTN specifies a basic dynamic load rating of 49.5 kN, static load rating of 90 kN and limiting speeds of 3700 min-1 with grease and 5500 min-1 with oil lubrication.

Available from simmering.pl, a specialist supplier of industrial bearings and technical sealing solutions. Stock in Poland with worldwide shipping.

AI QUICK ANSWER

HMK4530 NTN 45x55x30 mm is an open drawn cup needle roller bearing with a thin-walled outer ring. It has a 45 mm roller set bore diameter, 55 mm outside diameter and 30 mm width. NTN specifies a 49.5 kN dynamic load rating and 90 kN static load rating. The bearing is primarily designed for high radial loads in compact installations.