SNR UC206G2 30x62x38.1 mm - Self-Aligning Insert Ball Bearing

SNR UC206G2 30x62x38.1 mm - Self-Aligning Insert Ball Bearing

SNR UC206G2 is a self-aligning insert ball bearing manufactured under the SNR brand of the NTN Group. With dimensions of 30x62x38.1 mm, it features a spherical outer ring surface, an extended inner ring secured to the shaft by set screws, and seals with flinger rings on both sides. The bearing belongs to the UC series and is designed for installation in compatible bearing housings. It is supplied as a bearing insert, not a complete mounted bearing unit.

Technical Specifications - SNR UC206G2

Dimensional clarification: The dimensions 30x62x38.1 mm represent the bore diameter, outside diameter and inner ring width. The outer ring width is 19 mm.

The load ratings refer to the UC206G2 bearing insert itself, not to the load capacity of a complete bearing housing or mounted assembly.

What Does SNR UC206G2 Mean?

UC - Insert Ball Bearing Series

UC identifies a series of insert ball bearings designed for installation in compatible bearing housings.

Bearings in this series feature an extended inner ring with set screw shaft locking and a spherical outer ring surface.

The spherical outer ring allows limited angular adjustment within the corresponding housing seat, helping accommodate initial mounting misalignment.

The UC construction is different from that of a conventional deep groove ball bearing with a cylindrical outer ring.

206 - Bearing Size

The number 206 identifies the dimensional size of the bearing insert.

For SNR UC206G2, the nominal bore diameter is 30 mm.

The bearing has a 62 mm outside diameter and a 38.1 mm inner ring width.

The number 206 does not independently identify the bearing's internal clearance, lubricant or precision class.

G2 - SNR Design Variant

G2 is an integral part of the manufacturer's UC206G2 designation.

It must be retained when identifying, ordering or replacing the bearing.

The suffix should not automatically be interpreted as a C3 internal clearance designation, a specific grease specification or an equivalent suffix used by another manufacturer.

SNR - NTN Group Brand

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

Alternative Designations and Reference Numbers

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

• SNR UC206G2

• UC206G2 SNR

• SNR UC 206 G2

• UC 206 G2 SNR

• NTN-SNR UC206G2

• UC206G2 30x62x38.1 mm

• SNR UC206G2 insert bearing

• UC206G2 self-aligning ball bearing

• UC206G2 bearing insert

The manufacturer's primary designation is UC206G2.

Variations in spacing are commonly used in product listings but do not indicate different technical versions.

No unverified OEM reference numbers or manufacturer cross-references are assigned to this product.

Construction and Operating Principle of SNR UC206G2

Extended Inner Ring

The UC206G2 bearing has an extended inner ring with a total width of 38.1 mm.

The outer ring width is 19 mm.

This difference in width is a characteristic feature of UC-series insert bearings.

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

The nominal shaft diameter is 30 mm.

Spherical Outer Ring

The bearing has an outside diameter of 62 mm and a spherical outer ring surface.

This surface is designed to fit into a matching spherical housing seat.

The construction permits limited angular adjustment between the bearing insert and housing during installation.

This capability helps compensate for small initial alignment errors.

It does not mean that the bearing can operate with unrestricted shaft misalignment.

The permissible alignment angle depends on the housing design, sealing arrangement and operating conditions.

Ball and Raceway Arrangement

UC206G2 is a single-row insert ball bearing.

Its internal construction consists of an inner ring, outer ring, rolling balls and cage.

The bearing primarily accommodates radial loads and can also support axial loads within the limits of its construction and shaft locking arrangement.

The basic dynamic load rating is 19.5 kN, while the basic static load rating is 11.2 kN.

These values are used in bearing selection and service life calculations.

Seals and Flinger Rings

The bearing is equipped with seals and flinger rings on both sides.

The sealing arrangement helps retain lubricant and limits the entry of contaminants into the rolling element area.

Flinger rings provide additional protection by helping deflect contamination away from the sealing interface.

However, this arrangement does not guarantee complete resistance to high-pressure water, aggressive chemicals or severe abrasive contamination.

Suitability for demanding environments must be evaluated according to the actual operating conditions.

Set Screw Shaft Locking

The extended inner ring incorporates set screws with an M6x1 thread.

A 3 mm hex key is used for tightening.

The manufacturer's recommended tightening torque is 5.5 Nm.

Correct tightening helps prevent unwanted movement between the bearing inner ring and the shaft.

The shaft diameter, surface condition and installation procedure must comply with the manufacturer's recommendations.

Load Ratings of SNR UC206G2

Basic Dynamic Load Rating C - 19.5 kN

The basic dynamic load rating is 19.5 kN.

This value is used when calculating the fatigue life of the bearing under dynamic operating loads.

It is not the maximum permissible force that can be applied to the complete mounted bearing assembly.

Actual bearing life depends on the magnitude and direction of loading, rotational speed, lubrication, contamination and other operating conditions.

Basic Static Load Rating C0 - 11.2 kN

The basic static load rating is 11.2 kN.

This parameter is used when evaluating static loading conditions and the risk of permanent deformation at the rolling element and raceway contacts.

The correct bearing selection must consider both dynamic and static loading requirements.

SNR UC206G2 vs Other Bearing Variants

UC206G2 vs UCT206

UC206G2 is the individual insert ball bearing.

UCT206 is a complete take-up bearing unit consisting of a UC206G2 insert and a T206 cast iron take-up housing.

The housing dimensions of UCT206 must not be confused with the dimensions of the UC206G2 bearing insert.

UC206G2 vs T206

UC206G2 is a rolling bearing containing inner and outer rings, balls, cage and seals.

T206 is a separate cast iron take-up housing without a bearing insert.

These are different components and are not interchangeable.

UC206G2 vs UC205G2

UC205G2 is a smaller insert bearing designed for a nominal 25 mm shaft.

UC206G2 has a nominal bore diameter of 30 mm.

The outside diameter and ring widths also differ.

These bearings are not direct replacements.

UC206G2 vs UC207G2

UC207G2 is a larger bearing insert designed for a nominal 35 mm shaft.

Its outside diameter is 72 mm and its inner ring width is 42.9 mm.

UC206G2 and UC207G2 are not directly interchangeable.

UC206G2 vs 6206 Deep Groove Ball Bearing

Although both bearings have a nominal 30 mm bore diameter, UC206G2 and 6206 are fundamentally different products.

UC206G2 features a spherical outer ring, an extended inner ring and set screw shaft locking.

A standard 6206 deep groove ball bearing has a cylindrical outer ring and a different mounting arrangement.

The two bearings are not direct substitutes.

Selection and Interchangeability of SNR UC206G2

Before ordering, verify the following:

1. Complete designation UC206G2.

2. Manufacturer and required bearing version.

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. Spherical outer ring geometry.

8. Compatibility with the existing housing seat.

9. Set screw shaft locking arrangement.

10. Sealing construction.

11. Required internal clearance.

12. Radial and axial operating loads.

13. Rotational speed.

14. Operating temperature.

15. Lubrication and contamination conditions.

Can UC206G2 Be Replaced by an Insert from Another Manufacturer?

Insert bearings with similar designations and nominal dimensions are available from different manufacturers.

However, identical dimensions do not automatically guarantee complete interchangeability.

The spherical outer ring geometry, ring widths, shaft locking arrangement, seal construction, internal clearance and operating ratings must be checked.

Matching 30x62x38.1 mm dimensions alone are not sufficient to confirm full technical compatibility.

Applications of SNR UC206G2

UC-series insert ball bearings are intended for use in compatible mounted bearing housings.

Typical applications of this bearing construction include:

• Pillow block bearing units.

• Flange bearing units.

• Take-up bearing units.

• Industrial conveyor systems.

• Material handling machinery.

• Rotating shafts supported in self-aligning bearing housings.

• Equipment requiring straightforward bearing insert replacement.

These are typical applications of UC-series insert bearings, not verified OEM applications for specific machine models.

Suitability for an individual machine must be confirmed against its housing geometry and operating requirements.

Installation and Operating Recommendations

Shaft Preparation

The shaft must have a nominal diameter of 30 mm and a suitable surface condition for set screw locking.

Before installation, remove dirt, burrs and other contamination that could prevent correct seating of the bearing inner ring.

Installation in the Housing

The spherical outer ring must be fitted into a compatible housing seat.

Avoid damaging the spherical surface, seals or rolling elements during installation.

Installation forces should not be transmitted improperly through the balls and raceways.

Tightening the Set Screws

The M6x1 set screws must be tightened according to the manufacturer's installation procedure.

The recommended tightening torque is 5.5 Nm.

Correct shaft locking is essential for reliable operation.

Lubrication

The bearing has seals designed to help retain lubricant.

Lubrication and any required relubrication must follow the manufacturer's recommendations and the requirements of the complete mounted bearing assembly.

Do not introduce an incompatible grease without verifying its suitability for the existing lubricant and operating conditions.

Operating Inspection

During service, check:

• Bearing temperature.

• Noise and vibration.

• Seal condition.

• Inner ring locking on the shaft.

• Housing condition and alignment.

• Signs of contamination or lubricant loss.

Storage

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

Protect the seals and bearing surfaces against moisture, dust, corrosion and mechanical damage.

Frequently Asked Questions - SNR UC206G2

What are the dimensions of SNR UC206G2?

The bearing dimensions are 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.

What does UC mean in UC206G2?

UC identifies an insert ball bearing series with a spherical outer ring and an extended inner ring secured to the shaft by set screws.

What does G2 mean in SNR UC206G2?

G2 is part of the SNR bearing version designation. It should not automatically be interpreted as a C3 clearance specification or as a suffix with the same meaning across different bearing manufacturers.

Is UC206G2 a complete mounted bearing unit?

No. UC206G2 is the individual bearing insert. A compatible housing is required to create a complete mounted bearing unit.

What are the load ratings of UC206G2?

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

How is UC206G2 secured to the shaft?

The bearing uses M6x1 set screws in its extended inner ring. The recommended tightening torque is 5.5 Nm.

Is UC206G2 self-aligning?

Yes. Its spherical outer ring allows limited angular adjustment inside a compatible housing seat, helping accommodate initial installation misalignment.

Are UC206G2 and 6206 interchangeable?

No. UC206G2 is a spherical outside diameter insert bearing with set screw shaft locking, while 6206 is a conventional deep groove ball bearing with a cylindrical outer ring.

SNR UC206G2 - Key Technical Information

SNR UC206G2 is a self-aligning insert ball bearing from the NTN Group with dimensions of 30x62x38.1 mm. It features a spherical outer ring, an extended inner ring, M6x1 set screw shaft locking and seals with flinger rings. Its basic dynamic load rating is 19.5 kN and static rating is 11.2 kN. G2 identifies the manufacturer's bearing version.

SNR UC206G2 at simmering.pl

SNR UC206G2 is available from simmering.pl, a specialist supplier of rolling bearings, self-aligning bearing inserts, bearing housings and industrial sealing components.

We supply 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.