SNR EX206G2 30x62x19 mm - Self-Aligning Insert Ball Bearing

SNR EX206G2 30x62x19 mm - Self-Aligning Insert Ball Bearing with Eccentric Locking Collar

SNR EX206G2 is a single-row insert ball bearing manufactured under the SNR brand of the NTN Group, designed for installation on a 30 mm shaft. This EX200-series bearing has an outside diameter of 62 mm and an outer ring width of 19 mm. It features a spherical outer ring surface for alignment within a compatible housing and an eccentric locking collar for shaft attachment. The G2 suffix identifies the SNR relubrication system.

Technical Specifications - SNR EX206G2

Important dimensional distinction: The dimensions 30x62x19 mm refer to the bore diameter, outside diameter and outer ring width, respectively.

The inner ring width is 36.4 mm, while the overall width including the eccentric locking collar is 48.3 mm.

The 19 mm dimension must not be confused with the total axial space required for installation.

What Does SNR EX206G2 Mean?

EX - Bearing Insert Series with Eccentric Locking Collar

EX identifies an SNR series of insert ball bearings equipped with an eccentric collar shaft locking mechanism.

Unlike standard UC-series inserts, which use set screws positioned directly in the extended inner ring, EX-series bearings use an eccentric locking collar that engages with a corresponding eccentric surface on the inner ring extension.

This arrangement secures the bearing to the shaft and helps prevent relative rotation between the shaft and inner ring.

The locking mechanism is an essential feature when identifying EX206G2 or selecting a replacement.

206 - Bearing Size

The number 206 identifies the dimensional size of the bearing.

For EX206G2, the principal dimensions are:

• Bore diameter: 30 mm.

• Outside diameter: 62 mm.

• Outer ring width: 19 mm.

• Inner ring width: 36.4 mm.

• Overall width including eccentric locking collar: 48.3 mm.

G2 - SNR Relubrication System

The G2 suffix identifies the SNR relubrication system.

This feature allows the bearing to be relubricated through an appropriately designed mounted bearing arrangement.

G2 must not be confused with C3 internal clearance, a precision class or a particular cage material.

The complete designation EX206G2 should be retained when ordering the bearing or checking technical compatibility.

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.

Alternative Designations and Reference Numbers

The product may appear in technical catalogues, distributor listings and purchasing enquiries under the following written variations:

• SNR EX206G2

• EX206G2 SNR

• EX 206 G2 SNR

• SNR EX 206 G2

• NTN-SNR EX206G2

• EX206G2 30 mm

• EX206G2 62 mm

• EX206G2 30x62x19 mm

• EX206G2 insert bearing

• EX206G2 eccentric locking bearing

These are alternative written forms of the same designation, not separate technical versions.

UC206G2, UK206G2H and standard 6206 bearings must not automatically be considered interchangeable references for EX206G2.

Construction and Operating Principle of SNR EX206G2

Single-Row Ball Bearing Construction

EX206G2 is a single-row insert ball bearing designed to support a rotating shaft.

The rolling elements operate between the raceways of the inner and outer rings.

The bearing primarily supports radial loads and suitable axial loads within the limits established by the manufacturer and the mounting arrangement.

The single-row ball bearing construction provides rolling contact between the shaft-mounted inner ring and the stationary outer ring.

Spherical Outer Ring

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

Its external surface is spherical.

This geometry allows the bearing insert to be installed in a compatible housing with a matching spherical seat.

The arrangement permits limited alignment adjustment during installation, helping accommodate initial mounting inaccuracies.

However, the spherical outer ring does not mean that the bearing can compensate for unlimited shaft misalignment during operation.

The permissible alignment depends on the complete bearing unit and its operating conditions.

Extended Inner Ring

The inner ring has a width of 36.4 mm and is designed to work with the eccentric locking mechanism.

Its geometry differs from that of a standard 6206 deep groove ball bearing.

The extended inner ring provides the surface required for engagement with the eccentric locking collar.

Consequently, matching bore and outside diameters of 30 mm and 62 mm are insufficient to establish interchangeability with other bearing designs.

Eccentric Locking Collar

The EX206G2 shaft locking mechanism uses an eccentric locking collar.

During installation, the collar engages with the eccentric surface of the extended inner ring.

Rotating the collar in the appropriate locking direction creates the mechanical engagement required to secure the bearing to the shaft.

The collar is then secured using its locking screw.

For EX206G2, the locking screw has an M8x1 thread.

The recommended tightening torque is 11.5 Nm, and the specified hexagon key size is 4 mm.

The locking direction and installation procedure must follow the manufacturer's instructions for the particular shaft rotation arrangement.

The installation method used for UC-series bearings with direct set screw locking must not be substituted for the eccentric collar procedure.

Sealing Arrangement with Additional Flingers

EX206G2 features seals on both sides with additional flingers.

The sealing arrangement helps limit contamination entering the rolling element area and supports lubricant retention inside the bearing.

The additional flingers provide protection around the sealing region.

Sealing effectiveness depends on operating conditions, the type of contamination and the design of the mounted bearing unit.

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

Relubrication System

The G2 version incorporates the SNR relubrication system.

This feature allows lubricant replenishment when the bearing is installed in a compatible housing with the appropriate lubrication arrangement.

The lubrication zone position dimension C1 is 5 mm.

The relubrication method, grease selection and lubrication intervals must be established according to the manufacturer's recommendations and the actual operating conditions.

The presence of a relubrication system does not mean that any grease type or lubrication interval is suitable.

Load Ratings of SNR EX206G2

Basic Dynamic Load Rating C - 19.5 kN

The basic dynamic load rating of EX206G2 is 19.5 kN.

This parameter is used in bearing fatigue life calculations under dynamic loading conditions.

It does not represent the maximum permissible load of the complete mounted bearing assembly.

The strength of the housing, shaft and locking mechanism must also be considered.

Basic Static Load Rating C0 - 11.2 kN

The basic static load rating is 11.2 kN.

This value is used when evaluating loads that may cause permanent deformation at the contact points between the balls and raceways.

For stationary, slowly rotating or heavily loaded applications, static load conditions must be assessed separately from dynamic fatigue life.

SNR EX206G2 vs Other Bearing Versions

EX206G2 vs SNR UC206G2

Both bearing inserts are designed for a 30 mm shaft and have a spherical outer ring surface with a nominal diameter of 62 mm.

The main difference concerns the shaft locking mechanism.

EX206G2 uses an eccentric locking collar, whereas UC206G2 is secured using set screws positioned directly in the extended inner ring.

The two designs also differ in axial dimensions and locking component geometry.

EX206G2 and UC206G2 must not automatically be treated as direct replacements.

Before considering interchangeability, verify the complete bearing arrangement, including available axial space, shaft locking requirements and housing compatibility.

EX206G2 vs SNR UK206G2H

EX206G2 has a cylindrical bore of 30 mm and uses an eccentric locking collar.

UK206G2H uses a tapered bore and an H2306 adapter sleeve for installation on a 25 mm shaft.

Although both bearing inserts have an outside diameter of 62 mm, they use different shaft mounting systems.

The bore geometry, shaft diameter and fastening method must be considered when selecting the correct bearing.

EX206G2 vs EX206G2L3

EX206G2L3 identifies a separate SNR catalogue version.

The additional L3 suffix must not be omitted when ordering or selecting a replacement.

Identical principal dimensions do not establish identical operating characteristics.

The exact requirements and technical specifications of the L3 version must be verified before substitution.

Selection and Interchangeability of SNR EX206G2

Before ordering, verify the following:

1. Complete bearing designation EX206G2.

2. Shaft diameter of 30 mm.

3. Outside diameter of 62 mm.

4. Outer ring width of 19 mm.

5. Inner ring width of 36.4 mm.

6. Overall width including eccentric locking collar of 48.3 mm.

7. Spherical outer ring surface.

8. Compatibility with the housing seat.

9. Eccentric locking collar shaft attachment.

10. Available axial space for the eccentric locking collar.

11. Shaft rotation direction.

12. M8x1 locking screw.

13. Required tightening torque of 11.5 Nm.

14. Radial and axial operating loads.

15. Rotational speed.

16. Operating temperature.

17. Lubrication conditions and access to the relubrication system.

Can EX206G2 Be Replaced by a Bearing from Another Manufacturer?

An equivalent bearing must match more than the 30 mm bore and 62 mm outside diameter.

The inner and outer ring widths, eccentric locking collar construction, sealing arrangement and lubrication system must also be compatible.

The replacement must be suitable for the existing housing and available mounting space.

Identical principal dimensions do not guarantee direct interchangeability.

Applications of SNR EX206G2

EX206G2 can be used as a bearing insert in compatible mounted bearing units designed to support 30 mm shafts.

The manufacturer uses this insert in bearing units including:

• EXPE206

• EXPLE206

• EXF206

• EXFA206

These designations identify compatible mounted bearing unit configurations.

Typical applications for this type of bearing arrangement include:

• Material handling mechanisms.

• Conveyor shaft supports.

• Production equipment.

• Industrial rotating shaft assemblies.

• Mechanical systems requiring eccentric collar shaft locking.

• Mounted bearing arrangements requiring relubrication capability.

These are typical applications based on the bearing construction and compatible bearing unit designs, not a verified list of specific machine models or OEM part numbers.

Selection for a particular machine requires consideration of operating loads, rotational speed, housing geometry and environmental conditions.

Installation and Operating Recommendations

Shaft Preparation

Before installation, clean the shaft and inspect its surface.

Verify the nominal shaft diameter of 30 mm and the required fit.

Remove dirt, burrs, corrosion and other surface defects that could interfere with correct bearing positioning or locking.

Installation in the Housing

EX206G2 has a spherical outer ring surface.

Install the bearing insert in a compatible housing with a matching spherical seat.

Check that the bearing is correctly positioned and that the housing permits the required alignment adjustment.

When mounting force is required, apply it to the ring being fitted.

Do not transmit installation force through the rolling elements.

Eccentric Collar Installation

Position the bearing on the shaft and install the eccentric locking collar according to the manufacturer's procedure.

Lock the collar in the direction specified for the shaft rotation arrangement.

Tighten the M8x1 locking screw to the recommended torque of 11.5 Nm.

After installation, verify that the collar and inner ring are securely locked to the shaft.

Lubrication and Relubrication

The G2 version is equipped with the SNR relubrication system.

Lubricant replenishment should be performed according to the manufacturer's instructions and the operating requirements of the complete mounted bearing unit.

Use a lubricant suitable for the bearing and application.

Do not assume that all grease types are mutually compatible.

Operating Inspection

During operation, monitor:

• Bearing temperature.

• Noise and vibration.

• Seal condition.

• Stability of the eccentric locking collar.

• Housing condition.

• Signs of wear or corrosion.

• Lubrication condition.

Unexpected temperature increases, abnormal noise or excessive vibration may indicate mounting problems, contamination, insufficient lubrication or bearing damage.

Storage

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

Protect the mounting surfaces, eccentric locking components and seals against mechanical damage and moisture.

Frequently Asked Questions - SNR EX206G2

What Are the Dimensions of SNR EX206G2?

EX206G2 has a bore diameter of 30 mm, an outside diameter of 62 mm and an outer ring width of 19 mm. The inner ring width is 36.4 mm, while the overall width including the eccentric locking collar is 48.3 mm.

What Does EX Mean in EX206G2?

EX identifies an insert ball bearing design with an extended inner ring and eccentric locking collar shaft attachment.

The collar engages with the eccentric surface of the inner ring to secure the bearing to the shaft.

What Does G2 Mean in SNR EX206G2?

G2 identifies the SNR relubrication system.

It does not indicate C3 internal clearance.

Is EX206G2 a Self-Aligning Bearing?

Yes, within the limits of its mounted bearing arrangement. EX206G2 has a spherical outer ring surface that allows limited alignment adjustment inside a compatible housing.

This feature does not permit unlimited shaft misalignment during operation.

How Is EX206G2 Secured to the Shaft?

EX206G2 is secured using an eccentric locking collar.

The collar is locked with an M8x1 screw, for which the recommended tightening torque is 11.5 Nm.

What Are the Load Ratings of SNR EX206G2?

The basic dynamic load rating C is 19.5 kN.

The basic static load rating C0 is 11.2 kN.

These ratings describe the bearing itself and must not be interpreted as the maximum permissible load of the complete mounted bearing assembly.

Are EX206G2 and UC206G2 Interchangeable?

Direct interchangeability must not be assumed.

EX206G2 uses an eccentric locking collar, while UC206G2 uses direct set screw shaft locking.

Their axial geometry and fastening arrangements also differ.

Can SNR EX206G2 Be Relubricated?

Yes. The G2 suffix identifies the SNR relubrication system.

The method of supplying grease depends on the design of the complete mounted bearing unit.

SNR EX206G2 - Key Technical Information

SNR EX206G2 is a single-row insert ball bearing from the NTN Group, designed for a 30 mm shaft. It has a 62 mm outside diameter, a 19 mm outer ring width and a 48.3 mm overall width including the eccentric locking collar. Its spherical outer ring fits compatible housings, while G2 identifies the SNR relubrication system.

SNR EX206G2 at simmering.pl

SNR EX206G2 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.