SNR CUC206 30x62x38.1 mm - Insert Ball Bearing

SNR CUC206 30x62x38.1 mm - Insert Ball Bearing with Cylindrical Outer Ring

SNR CUC206 is a single-row insert ball bearing manufactured under the SNR brand of the NTN Group, with dimensions of 30x62x38.1 mm. This CUC200-series bearing insert features a cylindrical outer ring with grooves, an extended inner ring and set screw shaft locking. Unlike the standard UC206G2 insert, it does not have a spherical outer ring and therefore requires a compatible cylindrical mounting seat.

Technical Specifications - SNR CUC206

The dimensions 30x62x38.1 mm refer to the bore diameter, outside diameter and inner ring width, respectively.

The outer ring itself has a width of 19 mm.

The basic dynamic and static load ratings refer to the bearing. They do not define the maximum permissible load of the complete bearing arrangement, which also depends on the shaft, mounting seat and fastening method.

What Does SNR CUC206 Mean?

CUC - Bearing Insert Series with Cylindrical Outer Ring

CUC identifies an SNR series of insert ball bearings featuring a cylindrical outer ring surface.

The CUC206 model also has grooves machined into the outer ring.

This is a fundamental difference compared with standard UC-series inserts, which feature a spherical outer ring surface.

The cylindrical geometry of CUC206 requires a suitable mounting seat and does not provide the self-aligning capability associated with a spherical outer ring operating in a matching housing.

206 - Bearing Size

The number 206 identifies the bearing dimensional size.

For CUC206, the principal dimensions are:

• Bore diameter: 30 mm.

• Outside diameter: 62 mm.

• Inner ring width: 38.1 mm.

• Outer ring width: 19 mm.

SNR - NTN Group Brand

SNR is a brand within the NTN Group, a manufacturer of rolling bearings, bearing inserts, bearing housings and complete mounted bearing units.

The CUC206 designation does not include a separate suffix specifying C3 internal clearance, a special cage material or a particular precision class.

These characteristics must not be assumed from the designation alone.

Alternative Designations and Reference Numbers

The same product designation may appear in technical catalogues, distributor listings and purchasing enquiries in the following forms:

• SNR CUC206

• CUC206 SNR

• CUC 206 SNR

• SNR CUC 206

• NTN-SNR CUC206

• CUC206 30x62x38.1 mm

• CUC206 insert bearing

• CUC206 cylindrical outer ring bearing

These are alternative written forms and descriptions, not separate technical versions.

UC206G2, CUS206 and 6206 should not be treated as confirmed interchangeable references for CUC206. They represent different bearing constructions.

Construction and Operating Principle of SNR CUC206

Single-Row Ball Bearing Arrangement

CUC206 is a single-row insert ball bearing.

The rolling elements operate between the raceways of the inner and outer rings, allowing the shaft to rotate relative to the stationary mounting seat.

The bearing primarily supports radial loads and suitable axial loads, depending on operating conditions and the mounting arrangement.

Cylindrical Outer Ring

The outer ring of CUC206 has a nominal diameter of 62 mm and a width of 19 mm.

Its outside surface is cylindrical.

This is an important identification feature because standard UC206G2 bearing inserts have spherical outer ring surfaces.

Consequently, matching dimensions of 30x62x38.1 mm do not mean that both inserts use the same housing arrangement.

CUC206 must be installed in a mounting seat designed for its cylindrical outer ring geometry.

Grooves on the Outer Ring

The outer ring contains grooves with a width of 1.9 mm.

The diameter at the groove is 59.61 mm, and the distance to the grooves is 3.2 mm.

These grooves may interact with retaining components in an appropriately designed bearing arrangement.

Before installation, their position and compatibility with the mounting seat must be checked.

The presence of grooves does not automatically mean that retaining components are supplied with the bearing.

Extended Inner Ring

The inner ring has a width of 38.1 mm, considerably greater than the 19 mm width of the outer ring.

This extended inner ring provides space for the set screws used to secure the bearing to the shaft.

The bore diameter is 30 mm.

Set Screw Shaft Locking

CUC206 uses M6x1 set screws to secure the bearing directly to the shaft.

A 3 mm hexagon key is used to operate the screws.

The recommended tightening torque is 5.5 Nm.

Correct tightening is important for maintaining a stable connection between the shaft and inner ring.

Before installation, inspect the shaft surface and verify the required shaft fit.

Sealing Arrangement with Additional Flinger

The bearing features seals on both sides with an additional flinger.

This arrangement helps reduce the entry of contaminants into the rolling element area and supports lubricant retention inside the bearing.

Sealing effectiveness depends on operating conditions, the type of contamination and the installation arrangement.

Resistance to high-pressure washing or aggressive chemicals should not be assumed without application-specific verification.

Load Ratings of SNR CUC206

Basic Dynamic Load Rating C - 19.5 kN

The basic dynamic load rating is 19.5 kN.

This parameter is used when calculating bearing fatigue life under dynamic operating loads.

It does not represent the maximum permissible force that the complete bearing arrangement can withstand.

Basic Static Load Rating C0 - 11.2 kN

The basic static load rating is 11.2 kN.

This parameter is used to evaluate loads that may cause permanent deformation at the contact points between the rolling elements and raceways.

The strength of the shaft, mounting seat and fastening components must also be considered when designing the bearing arrangement.

SNR CUC206 vs Other Bearing Versions

CUC206 vs SNR UC206G2

Both bearings have the same bore diameter, outside diameter and inner ring width.

However, their outer ring constructions are different.

CUC206 is not automatically interchangeable with UC206G2.

A standard housing for UC206G2 is designed to accommodate a spherical outer ring surface.

CUC206 requires a mounting seat compatible with its cylindrical outer ring.

CUC206 vs SNR CUS206

CUC206 and CUS206 belong to a family of bearing inserts with cylindrical outer ring surfaces, but their axial dimensions differ.

Before considering a replacement, verify the mounting seat width, axial retention arrangement and shaft locking position.

CUC206 vs 6206

A standard 6206 deep groove ball bearing has principal dimensions of 30x62x16 mm.

CUC206 has the same bore and outside diameters, but its inner ring width is 38.1 mm and its outer ring width is 19 mm.

CUC206 also incorporates set screws, grooves on the outer ring and a sealing arrangement with an additional flinger.

It is not a direct replacement for a standard 6206 bearing.

Selection and Interchangeability of SNR CUC206

Before ordering, verify the following:

1. Complete designation CUC206.

2. Manufacturer SNR, if required by the machine documentation.

3. Bore diameter of 30 mm.

4. Outside diameter of 62 mm.

5. Inner ring width of 38.1 mm.

6. Outer ring width of 19 mm.

7. Cylindrical outer ring surface.

8. Presence, position and dimensions of the grooves.

9. Diameter at the grooves of 59.61 mm.

10. M6x1 set screw shaft locking.

11. Required tightening torque.

12. Sealing arrangement.

13. Mounting seat geometry and fit.

14. Axial retention method.

15. Required internal clearance.

16. Radial and axial operating loads.

17. Rotational speed.

18. Operating temperature.

19. Lubrication conditions.

Can CUC206 Be Replaced by a Bearing from Another Manufacturer?

Selecting an equivalent bearing requires verification of more than the principal dimensions of 30x62x38.1 mm.

The outer ring geometry, grooves, ring widths, shaft locking arrangement and sealing system must also be compatible.

A bearing from another manufacturer with the same bore and outside diameters is not necessarily interchangeable with CUC206.

Applications of SNR CUC206

CUC206 is intended for bearing arrangements designed to accommodate a cylindrical outer ring and secure the inner ring to the shaft using set screws.

Typical application areas for this type of construction include:

• Material handling mechanisms.

• Roller and shaft assemblies.

• Production machinery.

• Industrial equipment with appropriately designed bearing seats.

• Compact shaft support arrangements.

• Mechanical assemblies requiring an insert bearing with grooves on the outer ring.

These are examples of applications based on the bearing construction, not a verified list of specific machines or OEM references.

Selection for a particular application requires checking loads, rotational speed, mounting geometry and environmental conditions.

Installation and Operating Recommendations

Shaft Preparation

The shaft should have a nominal diameter of 30 mm and the appropriate fit.

Before installation, remove dirt, burrs and corrosion.

Inspect the shaft surface for damage that could interfere with secure bearing installation.

Installation in the Mounting Seat

CUC206 has a cylindrical outer ring surface.

The mounting seat must be designed for this geometry, and the axial retention arrangement should account for the grooves in the outer ring.

When a press fit is required, apply mounting force only to the ring being fitted.

Do not transmit installation force through the balls and raceways.

Shaft Locking

Tighten the M6x1 set screws to the manufacturer's recommended torque of 5.5 Nm.

Verify that the inner ring is correctly positioned and secured on the shaft.

Lubrication and Inspection

Lubrication requirements should be established using the manufacturer's documentation and the design of the bearing arrangement.

During operation, inspect bearing temperature, noise, vibration, seal condition and shaft locking stability.

Storage

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

Protect the mounting surfaces, grooves and seals against mechanical damage and moisture.

Frequently Asked Questions - SNR CUC206

What Are the Dimensions of SNR CUC206?

SNR CUC206 has principal dimensions of 30x62x38.1 mm. The bore diameter is 30 mm, the outside diameter is 62 mm and the inner ring width is 38.1 mm. The outer ring width is 19 mm.

Is CUC206 a Self-Aligning Bearing?

CUC206 is an insert ball bearing, but it has a cylindrical outer ring surface. Unlike UC206G2, it does not provide the self-aligning capability associated with a spherical outer ring mounted in a matching housing.

What Is the Difference Between CUC206 and UC206G2?

The main difference is the outer ring geometry. CUC206 has a cylindrical outer ring with grooves, while UC206G2 has a spherical outer ring. Despite their identical principal dimensions, they should not be considered direct replacements.

How Is CUC206 Secured to the Shaft?

CUC206 is secured to a 30 mm shaft using M6x1 set screws. The recommended tightening torque is 5.5 Nm.

Does CUC206 Have Seals?

Yes. The bearing features seals on both sides with an additional flinger, helping protect the rolling elements against contamination.

What Are the Load Ratings of SNR CUC206?

The basic dynamic load rating C is 19.5 kN, and the basic static load rating C0 is 11.2 kN.

Can CUC206 Be Installed in a UCP206 Housing?

This should not be assumed. A standard UCP206 housing is designed for an insert with a spherical outer ring, while CUC206 has a cylindrical outer ring.

Can CUC206 Replace a Standard 6206 Bearing?

CUC206 is not a direct replacement. A standard 6206 bearing measures 30x62x16 mm, while CUC206 has an extended inner ring, grooves on the outer ring and set screw shaft locking.

SNR CUC206 - Key Technical Information

SNR CUC206 is a single-row insert ball bearing from the NTN Group, measuring 30x62x38.1 mm. It belongs to the CUC200 series and features a cylindrical outer ring with grooves, seals with additional flingers and M6x1 set screw shaft locking. Unlike the spherical UC206G2 insert, CUC206 requires a compatible cylindrical mounting seat.

SNR CUC206 at simmering.pl

SNR CUC206 is offered by simmering.pl, a specialist supplier of rolling bearings, insert ball bearings, bearing housings and complete mounted bearing units.

We serve machinery manufacturers, industrial maintenance departments, mechanical repair workshops and B2B purchasing teams.

Our warehouse and order processing operations are located in Lublin, Poland. We supply customers throughout Europe and offer worldwide shipping.

We also assist customers in identifying bearing designations and selecting the correct bearing version.