SNR US206G2 30x62x30 mm - Self-Aligning Insert Ball Bearing

SNR US206G2 30x62x30 mm - Self-Aligning Insert Ball Bearing

SNR US206G2 is a single-row self-aligning insert ball bearing manufactured under the SNR brand of the NTN Group. With dimensions of 30x62x30 mm, it features a cylindrical bore, a spherical outer ring, set screw shaft locking and single-lip seals. The bearing belongs to the SNR US series and is designed for installation in compatible bearing housings. G2 is part of the manufacturer's specific bearing designation.

Technical Specifications - SNR US206G2

Important dimensional distinction: The inner ring width is 30 mm, while the outer ring width is 16 mm.

The designation C can have two different meanings in bearing documentation: outer ring width and basic dynamic load rating. These are separate technical parameters.

US206G2 is an individual bearing insert, not a complete mounted bearing unit.

What Does SNR US206G2 Mean?

US - Insert Ball Bearing Series

US identifies an SNR insert ball bearing series featuring a cylindrical bore and shaft locking by set screws.

Bearings in this series have a spherical outer ring surface designed to fit into a corresponding spherical housing seat.

This construction allows limited angular adjustment during installation.

US-series inserts are used in compatible mounted bearing units, including pillow block, flange and take-up arrangements.

206 - Bearing Size

The number 206 identifies the bearing's dimensional size.

For US206G2, the nominal bore diameter is 30 mm.

The outside diameter is 62 mm, and the inner ring width is 30 mm.

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

G2 - SNR Bearing Version

G2 is an integral part of the manufacturer's US206G2 designation.

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

The suffix must not automatically be interpreted as a C3 internal clearance designation, a particular grease specification or a precision class.

Suffix meanings should always be checked against the nomenclature of the specific manufacturer.

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 forms:

• SNR US206G2

• US206G2 SNR

• US 206 G2 SNR

• SNR US 206 G2

• NTN-SNR US206G2

• US206G2 30x62x30 mm

• SNR US206G2 insert bearing

• US206G2 self-aligning bearing insert

Related NTN designation:

• AS206D1 - corresponding NTN insert bearing designation.

Before using an alternative bearing, verify its complete dimensions, construction, sealing arrangement and operating specifications.

Construction and Operating Principle of SNR US206G2

Inner Ring Construction

The inner ring has a cylindrical bore diameter of 30 mm and a width of 30 mm.

It incorporates set screws that secure the bearing directly to the shaft.

The set screws have an M6x1 thread and are tightened using a 3 mm hex key.

The recommended tightening torque is 5.5 Nm.

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

Spherical Outer Ring

The outer ring has a diameter of 62 mm and a width of 16 mm.

Its external surface is spherical.

This geometry allows the bearing insert to adjust its angular position within a compatible spherical housing seat.

The arrangement helps compensate for small initial installation misalignment between the shaft and housing.

However, the self-aligning feature does not permit unrestricted operating misalignment.

Balls and Raceways

US206G2 is a single-row ball bearing.

The rolling elements operate between the inner and outer ring raceways, allowing the shaft to rotate relative to the housing.

The bearing is primarily designed to accommodate radial loads.

It can also support axial loads within the limits of its construction and shaft locking arrangement.

Single-Lip Sealing Arrangement

SNR US206G2 is equipped with single-lip seals.

Their function is to help retain lubricant and reduce the entry of contaminants into the rolling element area.

Sealing effectiveness depends on rotational speed, operating temperature, contamination levels and environmental conditions.

The seals should not be considered completely resistant to high-pressure water, aggressive chemicals or severe abrasive contamination without application-specific verification.

Set Screw Shaft Locking

The bearing is secured to the shaft using set screws located in the inner ring.

The screws apply a locking force against the shaft surface and restrict movement of the inner ring.

Correct installation requires a suitable shaft diameter, appropriate surface condition and the manufacturer's specified tightening torque.

Load Ratings of SNR US206G2

Basic Dynamic Load Rating C - 19.5 kN

The basic dynamic load rating is 19.5 kN.

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

It is not the maximum permissible force acting on a complete mounted bearing unit.

Actual bearing service life depends on load, rotational speed, lubrication, contamination and operating conditions.

Basic Static Load Rating C0 - 11.2 kN

The basic static load rating is 11.2 kN.

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

Both dynamic and static loading conditions should be considered during bearing selection.

SNR US206G2 vs Other Bearing Variants

US206G2 vs UC206G2

US206G2 and UC206G2 both have a 30 mm bore diameter and a 62 mm outside diameter.

However, their ring widths differ.

Although both use set screw shaft locking, their different axial dimensions mean they are not automatically interchangeable.

US206G2 vs UK206G2

US206G2 has a cylindrical 30 mm bore and is secured directly to the shaft using set screws.

UK206G2 has a tapered bore and requires a compatible adapter sleeve.

With an H2306 adapter sleeve, UK206G2 is designed for a nominal 25 mm shaft.

These bearings differ in bore construction, mounting method and axial dimensions.

They are not direct substitutes.

US206G2 vs US205G2

US205G2 is a smaller bearing insert designed for a nominal 25 mm shaft.

It has a 52 mm outside diameter and a 27 mm inner ring width.

It is not a direct replacement for US206G2.

US206G2 vs US207G2

US207G2 is designed for a nominal 35 mm shaft.

It has a 72 mm outside diameter and a 32 mm inner ring width.

It is not a direct replacement for US206G2.

Selection and Interchangeability of SNR US206G2

Before ordering, verify the following:

1. Complete manufacturer designation US206G2.

2. Manufacturer and required bearing version.

3. Nominal shaft diameter of 30 mm.

4. Outside diameter of 62 mm.

5. Inner ring width of 30 mm.

6. Outer ring width of 16 mm.

7. Spherical outer ring geometry.

8. Compatibility with the housing seat.

9. M6x1 set screw locking arrangement.

10. Bearing sealing configuration.

11. Required internal clearance.

12. Radial and axial operating loads.

13. Rotational speed.

14. Operating temperature.

15. Lubrication and contamination conditions.

Can US206G2 Be Replaced by a Bearing from Another Manufacturer?

A bearing insert from another manufacturer may be considered if its construction and technical parameters are compatible.

However, bearing selection should not be based only on the bore and outside diameters.

The inner and outer ring widths, spherical outer surface geometry, shaft locking arrangement, seals and operating requirements must also be checked.

Identical dimensions of 30x62x30 mm do not automatically guarantee complete interchangeability.

Applications of SNR US206G2

US-series insert ball bearings are designed for installation in compatible 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 equipment.

• Rotating shafts in production machinery.

• Equipment requiring replaceable insert ball bearings.

An example of a complete SNR bearing unit incorporating US206G2 is USPE206, which combines the bearing insert with a PE206 cast iron pillow block housing.

The insert is also used in compatible SNR bearing unit arrangements, including USP206 and UST206.

These are applications associated with the bearing construction and compatible bearing units, not a verified list of specific machine models originally equipped with US206G2.

Suitability for a particular machine must be confirmed against its technical documentation.

Installation and Operating Recommendations

Shaft Preparation

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

Before installation, remove dirt, burrs, corrosion and other surface defects that could interfere with proper seating.

Installation in the Housing

The spherical outer ring must be installed in a compatible housing seat.

Avoid transmitting inappropriate installation forces through the balls and raceways.

Do not strike the bearing seals or rolling elements during installation.

Set Screw Tightening

The M6x1 set screws should be tightened using a 3 mm hex key.

The manufacturer's recommended tightening torque is 5.5 Nm.

After installation, verify that the inner ring is securely fixed to the shaft.

Lubrication

Lubrication requirements depend on the bearing insert, housing arrangement and operating conditions.

When relubrication is required, use a lubricant compatible with the manufacturer's recommendations.

Do not introduce an incompatible grease without verifying its suitability.

Operating Inspection

During operation, regularly inspect:

• Bearing temperature.

• Noise and vibration.

• Seal condition.

• Shaft locking stability.

• Housing condition.

• Signs of contamination or lubricant loss.

Storage

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

Protect the spherical outer surface, bore, seals and raceways against moisture, dust, corrosion and mechanical damage.

Frequently Asked Questions - SNR US206G2

What are the dimensions of SNR US206G2?

The bearing dimensions are 30x62x30 mm. The bore diameter is 30 mm, the outside diameter is 62 mm and the inner ring width is 30 mm. The outer ring width is 16 mm.

What does US mean in US206G2?

US identifies an SNR insert ball bearing series with a cylindrical bore and set screw shaft locking, designed for installation in compatible bearing housings.

What does G2 mean in US206G2?

G2 is part of the manufacturer's bearing version designation. It should not automatically be interpreted as C3 internal clearance or a particular grease specification.

How is US206G2 secured to the shaft?

The bearing is secured using M6x1 set screws in the inner ring. The recommended tightening torque is 5.5 Nm.

What is the difference between US206G2 and UC206G2?

US206G2 has a 30 mm inner ring width and a 16 mm outer ring width. UC206G2 has corresponding widths of 38.1 mm and 19 mm.

What are the load ratings of US206G2?

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

Is US206G2 a Complete Mounted Bearing Unit?

No. US206G2 is an individual insert ball bearing. A compatible housing is required to form a complete mounted bearing unit.

What is the operating temperature range of US206G2?

The manufacturer specifies an operating temperature range of -20 to +100 degrees C. Actual suitability also depends on lubrication, load, speed and operating conditions.

SNR US206G2 - Key Technical Information

SNR US206G2 is a self-aligning insert ball bearing from the NTN Group, with dimensions of 30x62x30 mm. It features a spherical outer ring, single-lip seals and M6x1 set screw shaft locking. US identifies the insert bearing series, while G2 specifies the manufacturer's version. The basic dynamic load rating is 19.5 kN, and the static rating is 11.2 kN.

SNR US206G2 at simmering.pl

SNR US206G2 is offered by simmering.pl, a specialist supplier of rolling bearings, self-aligning bearing inserts, 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.