HF3020-L564 INA 30x37x20 mm - Drawn Cup Roller Clutch

HF3020-L564 INA 30x37x20 mm - Drawn Cup Roller Clutch

INA HF3020-L564 is a compact drawn cup roller clutch with dimensions 30x37x20 mm. It operates as a one-way clutch: relative rotation is permitted in the freewheeling direction, while in the opposite direction the rollers wedge between the shaft and the outer raceway, allowing torque to be transmitted. HF3020-L564 is not a conventional needle roller bearing for radial shaft support.

Technical data

INA HF3020-L564 dimensions

The basic dimensions are:

Fw: 30 mm
D: 37 mm
C: 20 mm

Complete dimensional specification:

30x37x20 mm

The small difference between the 30 mm shaft diameter and 37 mm outside diameter illustrates one of the main advantages of the HF series: a one-way clutch function can be incorporated into a mechanism with very limited radial installation space.

What is INA HF3020-L564?

HF3020-L564 may sometimes be referred to as a needle roller bearing, but the technically more accurate description is:

drawn cup roller clutch

or:

one-way roller clutch.

The rollers are not primarily intended to provide conventional radial shaft support. Their main function is to engage with the internal ramp geometry and the shaft surface to transmit torque in one direction.

How does an HF roller clutch work?

The operating principle is based on two different states.

In the freewheeling direction, the rollers remain in a position that allows relative rotation between the shaft and housing.

When the direction of relative rotation is reversed, the rollers move into the wedging zones. Contact pressure increases and the clutch locks, allowing torque to be transmitted.

This compact mechanism can therefore perform functions such as:

• freewheeling,
• one-way torque transmission,
• indexing,
• backstopping.

The locking direction must correspond to the required function of the mechanism.

INA HF series vs conventional needle roller bearings

HF-series roller clutches have a very small radial cross-section because they use a thin-walled drawn outer cup.

However, an HF roller clutch does not independently provide radial shaft guidance in the same way as a complete radial bearing arrangement.

Where the application requires both one-way clutch operation and radial shaft support, a suitable bearing arrangement must provide radial guidance separately.

Depending on the design, suitable needle roller bearings from families such as HK or BK may form part of the supporting arrangement.

HF3020-L564 should therefore not be treated as a conventional 30x37x20 mm needle roller bearing simply because its dimensions are similar.

HF3020-L564 designation

HF - drawn cup roller clutch series.

30 - relates to the 30 mm shaft diameter.

20 - relates to the 20 mm clutch width.

L564 is an additional INA execution designation and should be retained when identifying or ordering the component.

For replacement selection, use the complete designation:

INA HF3020-L564

rather than HF3020 alone.

The shaft acts as a mating raceway

This is one of the most important technical characteristics of the HF design.

The clutch does not use a conventional massive inner ring. The rollers operate directly against a suitably prepared shaft surface.

The shaft therefore becomes a functional component of the roller clutch system.

Its diameter, hardness, geometrical accuracy and surface quality directly influence clutch operation.

A shaft with a nominal diameter of 30 mm is therefore not automatically suitable simply because its diameter matches the clutch.

Torque capacity of HF3020-L564

The specified nominal torque for this size is:

90 Nm

This value should not be confused with the basic dynamic load rating C used for conventional radial bearings.

For a one-way roller clutch, one of the key functional parameters is the torque that can be transmitted in the locking direction.

This is another fundamental difference between HF3020-L564 and a conventional needle roller bearing.

HF3020-L564 vs HK3020

The designations HF and HK may appear similar, but they identify components with different functions.

HF - drawn cup roller clutch. Its primary function is to transmit torque in one direction while allowing free rotation in the opposite direction.

HK - drawn cup needle roller bearing. Its primary function is radial shaft guidance and accommodation of radial loads.

Therefore:

HF and HK are not interchangeable simply because their designations or dimensions appear similar.

In a properly designed assembly, however, components from these families may be used together to provide separate clutch and radial-support functions.

Selection and interchangeability

When selecting a replacement for INA HF3020-L564, do not check only the basic 30x37x20 mm dimensions. Also verify:

• roller clutch type,
• locking direction,
• torque capacity,
• wedging mechanism,
• shaft raceway requirements,
• housing design,
• required radial support,
• lubrication,
• permissible speed,
• complete execution designation.

A component measuring 30x37x20 mm is not automatically interchangeable with HF3020-L564.

Installation of INA HF3020-L564

Because of its thin-walled drawn outer cup, the clutch requires a correctly prepared housing and appropriate installation procedure.

During installation, avoid:

• direct hammer blows,
• misalignment during press fitting,
• deformation of the thin outer cup,
• contamination of functional surfaces,
• installation on an incorrectly prepared shaft.

After installation, the locking direction should be checked to ensure that it corresponds to the required function of the mechanism.

FAQ - INA HF3020-L564

What are the dimensions of INA HF3020-L564?

The basic dimensions are 30x37x20 mm: 30 mm shaft diameter, 37 mm outside diameter and 20 mm width.

Is HF3020-L564 a needle roller bearing?

It uses rollers, but technically HF3020-L564 is primarily a drawn cup roller clutch, not a conventional radial needle roller bearing.

How does HF3020-L564 work?

It permits free rotation in one direction. In the opposite direction, the rollers wedge between the shaft and outer raceway, locking the clutch and transmitting torque.

What torque can HF3020-L564 transmit?

The nominal torque specified for this size is 90 Nm.

Does HF3020-L564 have an inner ring?

It does not use a conventional massive inner ring. The rollers operate directly against a suitably prepared shaft surface.

Does HF3020-L564 provide radial shaft support?

The HF series requires suitable external radial support. Its one-way clutch function should not be confused with the function of a complete radial bearing arrangement.

Are HF3020-L564 and HK3020 the same?

No. HF is a roller clutch, while HK identifies a family of drawn cup needle roller bearings primarily designed to accommodate radial loads.

INA HF3020-L564 - key information

INA HF3020-L564 30x37x20 mm is a compact drawn cup roller clutch. It permits free rotation in one direction and transmits torque by locking in the opposite direction. Its nominal torque is 90 Nm. The HF design operates directly on a suitably prepared shaft raceway and requires separate radial support.

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

tów przemysłowych. Magazyn w Lublinie, wysyłka z Polski.