RB3010UUCC0 THK 30x55x10

RB3010UUCC0 THK 30x55x10

RB3010UUCC0 THK is a precision Cross-Roller Ring bearing from the THK RB series with dimensions of 30x55x10 mm. The RB design uses crossed cylindrical rollers and a separable outer ring and is intended primarily for applications with inner-ring rotation. The UU suffix specifies seals on both sides, while CC0 specifies negative radial clearance, providing preload.

Technical data

THK documentation confirms the 30x55x10 mm dimensions, RB-series construction, sealing arrangement and available radial-clearance specifications for this bearing family.

RB3010UUCC0 dimensions

The nominal dimensions are:

30x55x10 mm

where:

• d 30 mm - bore diameter
• D 55 mm - outside diameter
• B 10 mm - bearing width

The pitch circle diameter Dp is 41.5 mm.

These dimensions identify the basic bearing size, but they are not sufficient by themselves to determine complete interchangeability.

What does RB3010UUCC0 mean?

The complete designation is:

RB3010UUCC0

Each part of the designation identifies important characteristics of the bearing.

RB3010

RB3010 identifies the model within the THK RB series of Cross-Roller Rings.

The RB series uses a separable outer ring and an integral inner ring. THK specifies this design primarily for applications where the inner ring rotates.

For RB3010, the basic dimensions are:

30x55x10 mm

UU

The suffix UU specifies seals on both sides of the bearing.

Within the THK Cross-Roller Ring designation system:

• no seal suffix - open version
• U - seal on one side
• UU - seals on both sides

The seals help reduce the ingress of contaminants and retain lubricant inside the bearing.

CC0

CC0 identifies the radial-clearance specification.

For THK Cross-Roller Rings, CC0 specifies negative radial clearance, meaning that the bearing is supplied with preload.

This is an important technical characteristic and should be retained when selecting a replacement.

THK distinguishes radial-clearance specifications including:

• CC0 - negative radial clearance / preload
• C0 - positive radial clearance
• C1 - greater positive radial clearance

Consequently, RB3010UUCC0 and RB3010UUC0 should not automatically be considered interchangeable, even if their basic dimensions are identical.

Cross-Roller Ring construction

The rolling elements in a Cross-Roller Ring are cylindrical rollers arranged alternately at right angles to one another.

This crossed arrangement enables a compact bearing to accommodate loads acting in multiple directions, including radial loads, axial loads and moment loads, subject to the bearing's specified operating limits.

The RB series combines this crossed-roller arrangement with a separable outer ring and an integral inner ring.

The resulting construction is particularly suited to compact rotational systems where rigidity and rotational accuracy are important design requirements.

Separable outer ring

One of the defining features of the THK RB series is its separable outer ring.

The inner ring is integral and is intended to provide stable rotational accuracy in applications where the inner ring rotates.

This construction is different from other THK Cross-Roller Ring series, so another crossed roller bearing with the same 30x55x10 mm dimensions should not automatically be treated as an equivalent.

CC0 preload

The CC0 version has negative radial clearance and is therefore preloaded.

Preload is important in mechanisms where bearing rigidity and precise rotational guidance are required. It reduces internal play but also means that a CC0 bearing should not automatically be replaced with a C0 or C1 version.

When replacing RB3010UUCC0, the radial-clearance specification should therefore be checked together with the basic dimensions.

Sealing on both sides

The UU configuration incorporates seals on both sides of the bearing.

The sealing arrangement helps:

• limit contamination entering the rolling contact area
• retain lubricant inside the bearing
• protect internal rolling surfaces during operation

The presence of UU seals is part of the bearing specification and should be considered when selecting an equivalent product.

Lubrication

THK specifies AFB-LF Grease as the standard lubricant for this model, with grease lubrication as the standard lubrication method.

A lubrication hole is also specified for the RB3010.

Lubrication intervals and grease selection during service should follow THK recommendations and take into account the actual operating conditions of the mechanism.

RB3010UUCC0 vs other RB3010 variants

The complete suffix is technically important.

For example:

RB3010UUCC0
Seals on both sides + CC0 negative radial clearance / preload

RB3010UUC0
Seals on both sides + C0 radial clearance

RB3010UUC1
Seals on both sides + C1 radial clearance

These versions may share the same basic 30x55x10 mm dimensions while differing in internal clearance and operating characteristics.

Therefore, the full RB3010UUCC0 designation should be used when identifying or replacing the bearing.

How to select RB3010UUCC0

Before ordering, verify:

• full designation RB3010UUCC0
• manufacturer THK
• RB series
• dimensions 30x55x10 mm
• Cross-Roller Ring construction
• separable outer ring
• UU sealing on both sides
• CC0 radial clearance / preload
• required rotational arrangement
• required accuracy class
• mounting conditions
• lubrication requirements
• requirements of the specific machine or mechanism

A 30x55x10 mm bearing is not automatically interchangeable with THK RB3010UUCC0.

The Cross-Roller Ring design, sealing arrangement, preload specification and bearing-series construction must also be considered.

Alternative designations and search references

Natural variations of the product designation include:

• RB3010UUCC0 THK
• THK RB3010UUCC0
• RB 3010 UU CC0 THK
• RB3010 UU CC0
• THK RB3010 UU CC0
• RB3010UUCC0 30x55x10
• THK RB3010 30x55x10
• RB3010 Cross Roller Bearing
• RB3010 Cross-Roller Ring

A precision-class suffix may also appear in THK designation structures. It should not be added to RB3010UUCC0 unless it is actually specified for the supplied bearing.

Applications

THK RB-series Cross-Roller Rings are intended for precision rotational mechanisms. The RB construction is particularly suited to arrangements where the inner ring rotates and rotational accuracy and rigidity are required.

The exact suitability of RB3010UUCC0 for a particular machine depends on factors including:

• applied radial load
• axial load
• moment load
• rotational accuracy requirements
• mounting rigidity
• operating speed
• lubrication
• operating environment

A specific machine or OEM application should not be assumed solely from the RB3010UUCC0 designation.

Installation

Cross-Roller Ring bearings should be installed under clean conditions. The raceways, rollers and seals must be protected against contamination and mechanical damage.

The mating surfaces should be checked for dimensional accuracy, cleanliness and correct fit before assembly.

Because RB3010UUCC0 is a precision preloaded bearing, correct mounting and housing geometry are particularly important. Installation procedures and tightening requirements should follow the relevant THK Cross-Roller Ring instructions.

FAQ

What are the dimensions of THK RB3010UUCC0?

The nominal dimensions are 30x55x10 mm: 30 mm bore diameter, 55 mm outside diameter and 10 mm width.

What type of bearing is RB3010UUCC0?

RB3010UUCC0 is a THK Cross-Roller Ring, also described as a crossed roller bearing. It belongs to the RB series and uses crossed cylindrical rollers.

What does UU mean in RB3010UUCC0?

UU means that the bearing is equipped with seals on both sides.

What does CC0 mean?

CC0 specifies negative radial clearance. The bearing is therefore supplied with preload.

Is RB3010UUCC0 preloaded?

Yes. The CC0 radial-clearance specification corresponds to a preloaded configuration.

Are RB3010UUCC0 and RB3010UUC0 the same bearing?

No. They can share the same basic dimensions and UU sealing arrangement, but CC0 specifies negative radial clearance and preload, while C0 specifies a different radial-clearance condition.

Is RB3010UUCC0 designed for inner-ring rotation?

Yes. The THK RB-series construction is primarily intended for applications where the inner ring rotates.

Can another 30x55x10 bearing replace RB3010UUCC0?

Not automatically. Dimensions alone are insufficient. The Cross-Roller Ring construction, separable outer ring, UU sealing, CC0 preload, accuracy requirements and mounting conditions must also be verified.

RB3010UUCC0 THK - key information

RB3010UUCC0 THK is a precision RB-series Cross-Roller Ring bearing with dimensions of 30x55x10 mm. It features crossed cylindrical rollers, a separable outer ring and seals on both sides. The UU suffix identifies double-sided sealing, while CC0 specifies negative radial clearance and preload. The RB design is intended primarily for inner-ring rotation.