SNR UK206G2 30x62x25 mm - Tapered Bore Insert Ball Bearing

SNR UK206G2 30x62x25 mm - Self-Aligning Insert Ball Bearing with Tapered Bore

SNR UK206G2 is a self-aligning insert ball bearing manufactured under the SNR brand of the NTN Group. It has a 62 mm outside diameter, a 25 mm inner ring width and a tapered bore with a 1:12 taper. The bearing is designed for mounting on a 25 mm shaft using an H2306 adapter sleeve. Its spherical outer ring allows installation in compatible bearing housings. The G2 suffix is part of the manufacturer's specific bearing designation.

Important dimensional clarification: The catalogue dimensions 30x62x25 mm do not indicate a 30 mm cylindrical shaft bore. UK206G2 has a tapered bore and is normally mounted on a 25 mm shaft using an H2306 adapter sleeve.

Technical Specifications - SNR UK206G2

The dimensional designation 30x62x25 mm refers to the nominal tapered bore dimension, outside diameter and inner ring width.

The bearing insert is supplied as a separate component unless the specific product offer explicitly includes an adapter sleeve or housing.

What Does SNR UK206G2 Mean?

UK - Tapered Bore Insert Bearing Series

UK identifies a series of insert ball bearings designed for installation in compatible bearing housings using an adapter sleeve.

Unlike UC-series insert bearings, which typically use set screws to secure the inner ring directly to the shaft, UK-series bearings feature a tapered inner bore.

The tapered bore works with a matching adapter sleeve to establish a secure connection between the bearing and a cylindrical shaft.

This mounting arrangement allows the bearing to be installed without set screws acting directly on the shaft surface.

206 - Bearing Size

The number 206 identifies the dimensional size of the bearing.

For SNR UK206G2, the outside diameter is 62 mm and the inner ring width is 25 mm.

When combined with the standard H2306 adapter sleeve, the bearing is intended for a nominal 25 mm shaft.

The number 206 does not independently specify internal clearance, lubricant type or precision class.

G2 - SNR Bearing Version

G2 is an integral part of the manufacturer's UK206G2 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 particular 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 product may appear in technical catalogues, distributor listings and purchasing enquiries under the following written forms:

• SNR UK206G2

• UK206G2 SNR

• SNR UK 206 G2

• UK 206 G2 SNR

• NTN-SNR UK206G2

• UK206G2 30x62x25 mm

• SNR UK206G2 tapered bore bearing

• UK206G2 insert ball bearing

• UK206G2 self-aligning bearing insert

Related mounting component:

• H2306 - adapter sleeve for mounting UK206G2 on a nominal 25 mm shaft.

UK206G2 and H2306 are different components and must not be treated as interchangeable product designations.

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

Construction and Operating Principle of SNR UK206G2

Tapered Inner Bore - 1:12 Taper

The most important construction feature of UK206G2 is its tapered inner bore.

The bore has a taper ratio of 1:12 and is designed to work with a matching adapter sleeve.

During installation, axial movement of the bearing along the tapered sleeve creates a clamping effect between the sleeve and the shaft.

This provides a mechanical locking arrangement without the use of set screws directly in the bearing inner ring.

The mounting method requires the correct adapter sleeve and installation procedure.

Inner Ring Construction

The bearing has an inner ring width of 25 mm.

Its tapered bore is designed for mounting with an adapter sleeve rather than directly onto a cylindrical shaft.

Unlike UC206G2, UK206G2 does not use set screws in an extended inner ring to secure the bearing to the shaft.

The difference in shaft locking method is essential when selecting a replacement bearing.

Spherical Outer Ring

The bearing has an outside diameter of 62 mm.

Its spherical outer ring surface is designed to fit into a corresponding spherical housing seat.

This construction allows limited angular adjustment during installation and helps accommodate small initial alignment errors.

However, the spherical seating arrangement does not permit unrestricted operating misalignment.

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

Rolling Elements and Raceways

UK206G2 is an insert ball bearing primarily intended to accommodate radial loads.

It can also support axial loads within the limits of its internal construction and mounting arrangement.

The basic dynamic load rating is 19.5 kN.

The basic static load rating is 11.2 kN.

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

They do not represent the maximum permissible load of a complete mounted bearing unit.

H2306 Adapter Sleeve

The H2306 adapter sleeve is designed for mounting the bearing on a nominal 25 mm cylindrical shaft.

The adapter sleeve assembly includes the components required to secure the bearing through its tapered bore, typically a locknut and locking washer.

The sleeve provides the interface between the cylindrical shaft and the tapered bearing bore.

Correct sleeve selection is as important as selecting the bearing itself.

The H2306 adapter sleeve should not be assumed to be included with the UK206G2 bearing insert unless explicitly stated in the product offer.

SNR UK206G2 vs Other Bearing Variants

UK206G2 vs UC206G2

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

UC206G2 has a cylindrical 30 mm bore and is secured to the shaft using set screws.

Both bearings have a 62 mm outside diameter, but they differ in inner ring construction, axial dimensions and shaft locking arrangement.

They are not direct substitutes.

UK206G2 vs US206G2

US206G2 is an insert ball bearing with a cylindrical 30 mm bore and set screw shaft locking.

UK206G2 has a tapered bore and uses an adapter sleeve.

These differences affect the required shaft diameter, installation procedure and mounting components.

The two bearing inserts should not be considered automatically interchangeable.

UK206G2 vs UK205G2

UK205G2 is a smaller tapered bore bearing insert.

It has different bearing dimensions and requires a different adapter sleeve.

It is not a direct replacement for UK206G2.

UK206G2 vs UK207G2

UK207G2 is a larger insert bearing from the same general construction family.

It differs in ring dimensions and the required adapter sleeve.

Before selecting either version, verify the shaft diameter, housing compatibility and complete bearing designation.

Selection and Interchangeability of SNR UK206G2

Before ordering, verify the following:

1. Complete manufacturer designation UK206G2.

2. Manufacturer and required bearing version.

3. Tapered bore with a 1:12 taper.

4. Outside diameter of 62 mm.

5. Inner ring width of 25 mm.

6. Outer ring width of 19 mm.

7. Nominal shaft diameter of 25 mm when using H2306.

8. Compatibility with the required adapter sleeve.

9. Spherical outer ring and housing seat geometry.

10. Bearing sealing arrangement.

11. Required internal clearance.

12. Radial and axial operating loads.

13. Rotational speed.

14. Operating temperature.

15. Lubrication and contamination conditions.

Can UK206G2 Be Replaced by an Insert Bearing from Another Manufacturer?

Tapered bore insert bearings with similar designations and nominal dimensions are available from different manufacturers.

However, identical outside diameters do not automatically guarantee interchangeability.

The spherical outer ring geometry, bore taper, inner ring width, sealing arrangement, internal clearance, load ratings and adapter sleeve compatibility must be compared.

A matching 62 mm outside diameter alone is not sufficient to establish full technical compatibility.

Applications of SNR UK206G2

UK-series insert ball bearings are designed for use in compatible mounted bearing housings with adapter sleeve shaft locking.

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 by self-aligning bearing housings.

• Equipment requiring adapter sleeve shaft mounting.

These are typical applications of UK-series bearing inserts, not a verified list of specific machine models originally equipped with SNR UK206G2.

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

Installation and Operating Recommendations

Shaft Preparation

Before installation, verify the shaft diameter and inspect its surface condition.

When using the H2306 adapter sleeve, the nominal shaft diameter is 25 mm.

The shaft should be clean and free from burrs, corrosion and mechanical damage that could prevent correct sleeve seating.

Adapter Sleeve Installation

Position the H2306 adapter sleeve on the shaft according to the manufacturer's instructions.

Install the UK206G2 bearing insert onto the tapered sleeve surface.

Tightening the adapter sleeve locknut produces axial displacement and establishes the required clamping force.

Do not apply an arbitrary tightening torque or axial displacement without following the manufacturer's installation procedure.

Installation in the Housing

The spherical outer ring must be seated in a compatible housing.

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

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

Lubrication

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

Follow the manufacturer's recommendations for lubricant selection and relubrication.

Do not introduce an incompatible grease without checking its suitability.

Operating Inspection

During service, inspect:

• Bearing temperature.

• Noise and vibration.

• Seal condition.

• Adapter sleeve locking.

• 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 tapered bore, spherical outer surface, seals and raceways against moisture, dust, corrosion and mechanical damage.

Frequently Asked Questions - SNR UK206G2

What are the dimensions of SNR UK206G2?

The bearing has a 62 mm outside diameter and a 25 mm inner ring width. Its bore is tapered with a 1:12 taper. The catalogue dimensions are commonly expressed as 30x62x25 mm.

Is UK206G2 designed for a 30 mm shaft?

Not when installed with the standard H2306 adapter sleeve. This sleeve is intended for a nominal 25 mm shaft. The 30 mm dimension relates to the nominal tapered bore size rather than the shaft diameter used with H2306.

Which adapter sleeve is used with UK206G2?

The standard metric adapter sleeve is H2306, intended for a nominal 25 mm shaft.

Is the H2306 adapter sleeve included with UK206G2?

Not necessarily. UK206G2 identifies the bearing insert itself. The contents of the supplied product must be confirmed in the individual offer.

What is the difference between UK206G2 and UC206G2?

UK206G2 has a tapered bore and uses an adapter sleeve. UC206G2 has a cylindrical 30 mm bore and uses set screws for shaft locking.

What are the load ratings of UK206G2?

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

Is UK206G2 self-aligning?

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

Can UK206G2 Be Installed Without an Adapter Sleeve?

Direct installation onto a cylindrical shaft without an adapter sleeve is not the standard mounting method. The bearing is designed to work with a compatible tapered adapter sleeve.

SNR UK206G2 - Key Technical Information

SNR UK206G2 is a self-aligning insert ball bearing from the NTN Group, featuring a 1:12 tapered bore, a 62 mm outside diameter and a 25 mm inner ring width. It is designed for mounting on a 25 mm shaft using an H2306 adapter sleeve. Its spherical outer ring fits compatible housings, while the basic dynamic and static load ratings are 19.5 kN and 11.2 kN.

SNR UK206G2 at simmering.pl

SNR UK206G2 is available from simmering.pl, a specialist supplier of rolling bearings, self-aligning bearing inserts, bearing housings and mounting 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.