SNR ES206-18G2 28.575x62x16 mm - Self-Aligning Insert Ball Bearing

SNR ES206-18G2 28.575x62x16 mm - Self-Aligning Insert Ball Bearing

SNR ES206-18G2 is a single-row insert ball bearing manufactured under the SNR brand of the NTN Group, designed for installation on a 1 1/8 inch (28.575 mm) shaft. The bearing has a 62 mm outside diameter and a 16 mm outer ring width. Its construction features a spherical outer ring surface, an eccentric locking collar and a single-lip sealing arrangement. The G2 designation identifies the SNR relubrication system.

Technical Specifications - SNR ES206-18G2

Important dimensional distinction: The dimensions 28.575x62x16 mm refer to the bore diameter, outside diameter and outer ring width.

The inner ring width is 23.8 mm, while the overall width including the eccentric locking collar is 35.7 mm.

The bore diameter of 28.575 mm corresponds exactly to 1 1/8 inch. This bearing is not intended for a 30 mm shaft.

What Does SNR ES206-18G2 Mean?

ES - Insert Bearing Series with Eccentric Locking Collar

ES identifies an SNR insert bearing series equipped with an eccentric locking collar for securing the bearing to the shaft.

The locking mechanism uses an eccentric surface on the extended inner ring together with a matching locking collar.

This arrangement differs from US and UC insert bearing designs, which use locking screws positioned directly in the inner ring.

206 - Bearing Size Identification

The number 206 identifies the bearing size.

For ES206-18G2, the outside diameter is 62 mm and the outer ring width is 16 mm.

However, the number 206 alone does not define the bore diameter of this inch-sized version.

-18 - Bore Diameter of 1 1/8 Inch

The -18 element identifies a bearing designed for a shaft diameter of 1 1/8 inch.

This corresponds exactly to 28.575 mm.

It must not be confused with a 28 mm or 30 mm metric bore.

Selecting an incorrect bore size may prevent installation or result in improper shaft locking.

G2 - SNR Relubrication System

The G2 designation identifies an SNR insert bearing version equipped with a relubrication system.

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

G2 does not indicate C3 internal clearance, a particular precision class or a specific grease formulation.

SNR - NTN Group Brand

SNR is a brand within the NTN Group, a manufacturer of rolling bearings, bearing inserts, 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 variations:

• SNR ES206-18G2

• ES206-18G2 SNR

• ES 206-18 G2 SNR

• NTN-SNR ES206-18G2

• ES206-18G2 1 1/8 inch

• ES206-18G2 28.575 mm

• ES206-18G2 28.575x62x16 mm

• ES206-18G2 insert bearing

• ES206-18G2 eccentric locking bearing

These written variations refer to the same manufacturer designation.

ES206-18G2, EX206-18G2, US206-18G2 and UC206-18G2 must not automatically be considered interchangeable products.

Construction and Operating Principle of SNR ES206-18G2

Single-Row Ball Bearing Construction

ES206-18G2 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 construction primarily supports radial loads and can accommodate appropriate axial loads within the limits determined by the bearing specifications and mounting conditions.

Spherical Outer Ring Surface

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

Its external surface is spherical.

This allows the insert to be mounted in a compatible housing with a spherical seating surface and permits limited alignment adjustment during installation.

It does not mean that the bearing can compensate for unlimited shaft misalignment during operation.

Extended Inner Ring

The inner ring has a width of 23.8 mm.

Its geometry is designed to work with the eccentric locking collar.

The overall width of the assembly, including the locking collar, is 35.7 mm.

These dimensions are important when selecting a replacement bearing for an existing machine, particularly where axial installation space is limited.

Eccentric Locking Collar

ES206-18G2 uses an eccentric locking collar to secure the bearing to the shaft.

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

After the collar has been positioned and locked in the appropriate direction, the assembly is secured using a locking screw.

The manufacturer specifies:

• Locking screw thread: 5/16-24UNF.

• Hex key size: 5/32 inch.

• Recommended tightening torque: 8 Nm.

The locking direction and installation procedure must follow the manufacturer's instructions.

Installation procedures intended for UC inserts with direct inner ring locking screws must not be applied automatically to this bearing.

Single-Lip Sealing Arrangement

The manufacturer identifies ES206-18G2 as an insert bearing with a single-lip sealing arrangement.

The seal helps limit the entry of contaminants into the rolling element area and reduce lubricant leakage.

Double-lip seals or other sealing systems used in different SNR bearing series must not be assumed to be present in this version.

Relubrication System

The G2 version incorporates the SNR relubrication system.

The C1 dimension, which relates to the position of the lubrication zone, is 5 mm.

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

The lubricant type and relubrication interval must be selected according to the manufacturer's recommendations and actual operating conditions.

Load Ratings of SNR ES206-18G2

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 defined loading conditions.

It is not the maximum permissible load of the complete mounted bearing unit.

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 parameter is relevant when evaluating loads that may cause permanent deformation at the contact points between the balls and raceways.

Static, shock-loading and very-low-speed applications require an appropriate assessment of the operating conditions.

SNR ES206-18G2 vs Other Bearing Versions

ES206-18G2 vs SNR EX206-18G2

Both inserts have a 1 1/8 inch bore, a 62 mm outside diameter and an eccentric locking collar.

However, their axial dimensions differ.

ES206-18G2 has a more compact axial construction.

Direct interchangeability must not be assumed without checking the available mounting space, housing design and shaft location requirements.

ES206-18G2 vs SNR US206-18G2

Both inserts have a 28.575 mm bore, a 62 mm outside diameter and a 16 mm outer ring width.

However, their shaft locking mechanisms differ.

ES206-18G2 uses an eccentric locking collar, while US206-18G2 is secured using locking screws positioned directly in the inner ring.

Their inner ring widths and mounting geometries also differ.

ES206-18G2 vs SNR UC206-18G2

UC206-18G2 has a 28.575 mm bore and a 62 mm outside diameter, but its outer ring width is 19 mm.

It uses locking screws rather than an eccentric locking collar.

It is not an automatic replacement for ES206-18G2.

ES206-18G2 vs ES206-19G2

ES206-18G2 is designed for a 1 1/8 inch shaft, equivalent to 28.575 mm.

ES206-19G2 has a 1 3/16 inch bore, equivalent to 30.1625 mm.

Although several external dimensions may be identical, these inserts are intended for different shaft diameters.

Selection and Interchangeability of SNR ES206-18G2

Before ordering, verify the following:

1. Complete manufacturer designation ES206-18G2.

2. Shaft diameter of 1 1/8 inch.

3. Bore diameter of 28.575 mm.

4. Outside diameter of 62 mm.

5. Outer ring width of 16 mm.

6. Inner ring width of 23.8 mm.

7. Overall width of 35.7 mm.

8. Spherical outer ring surface.

9. Compatibility with the housing seat.

10. Eccentric locking collar construction.

11. Available installation space for the locking collar.

12. Shaft rotation direction.

13. Locking screw thread 5/16-24UNF.

14. Recommended tightening torque of 8 Nm.

15. Radial and axial loading conditions.

16. Operating speed.

17. Operating temperature.

18. Lubrication requirements and access to the relubrication system.

Can ES206-18G2 Be Replaced by Another Manufacturer's Bearing?

A replacement must match more than the bore and outside diameters.

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

Matching the principal dimensions of 28.575x62x16 mm does not guarantee complete interchangeability.

Applications of SNR ES206-18G2

ES206-18G2 is designed for use as an insert bearing in compatible mounted bearing units supporting 1 1/8 inch shafts.

Typical applications for this type of bearing insert include:

• Shaft support assemblies in industrial machinery.

• Conveyor systems and material handling equipment.

• Production and processing machinery.

• Drive systems using inch-sized shafts.

• Machinery requiring eccentric collar shaft locking.

• Bearing units equipped with a compatible relubrication arrangement.

These are typical applications based on the bearing's construction, not a confirmed list of specific machine models.

Selection must take account of load conditions, rotational speed, housing geometry and the operating environment.

Installation and Operating Recommendations

Shaft Preparation

Before installation, clean the shaft and verify its diameter.

The nominal shaft diameter is 28.575 mm.

Remove burrs, corrosion and other surface damage that could prevent proper seating or locking.

Installation in the Housing

Install the bearing in a compatible spherical housing seat.

Mounting forces must not be transmitted through the rolling elements.

Ensure correct alignment between the bearing insert and shaft.

Eccentric Collar Locking

Install the eccentric locking collar according to the manufacturer's instructions.

After correctly locking the collar, tighten the 5/16-24UNF locking screw to the recommended torque of 8 Nm.

Lubrication and Inspection

Relubrication must follow the manufacturer's recommendations and actual operating conditions.

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

Frequently Asked Questions - SNR ES206-18G2

What Are the Dimensions of SNR ES206-18G2?

The bore diameter is 28.575 mm, the outside diameter is 62 mm and the outer ring width is 16 mm. The inner ring width is 23.8 mm, while the overall width including the eccentric locking collar is 35.7 mm.

What Does -18 Mean in ES206-18G2?

The -18 designation identifies an inch-sized bore of 1 1/8 inch, equivalent to 28.575 mm.

What Does G2 Mean?

G2 identifies the SNR relubrication system. It does not indicate C3 internal clearance.

How Is ES206-18G2 Secured to the Shaft?

The bearing uses an eccentric locking collar secured by a 5/16-24UNF locking screw. The recommended tightening torque is 8 Nm.

Is ES206-18G2 Suitable for a 30 mm Shaft?

No. The bore diameter is 28.575 mm, corresponding to a 1 1/8 inch shaft.

Are ES206-18G2 and EX206-18G2 Interchangeable?

Direct interchangeability must not be assumed. ES206-18G2 has a 16 mm outer ring width and a 35.7 mm overall width, while EX206-18G2 has corresponding dimensions of 19 mm and 48.3 mm.

What Are the Load Ratings of ES206-18G2?

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

Can SNR ES206-18G2 Be Relubricated?

Yes. The G2 version incorporates the SNR relubrication system. The method of supplying lubricant depends on the construction of the complete mounted bearing unit.

SNR ES206-18G2 - Key Technical Information

SNR ES206-18G2 is a single-row insert ball bearing with an eccentric locking collar, designed for a 1 1/8 inch (28.575 mm) shaft. It has a 62 mm outside diameter, a 16 mm outer ring width and a 35.7 mm overall width. Its spherical outer ring fits compatible housings, while G2 identifies the SNR relubrication system.

SNR ES206-18G2 at simmering.pl

SNR ES206-18G2 is offered by simmering.pl, a specialist supplier of rolling bearings, bearing inserts, bearing housings and complete mounted bearing units.

We serve machinery manufacturers, industrial maintenance departments, mechanical 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, dimensions and compatible replacement parts.