SKF GE 30 ES-2RS 30x47x22 Radial Spherical Plain Bearing

SKF GE 30 ES-2RS 30x47x22 Radial Spherical Plain Bearing

SKF GE 30 ES-2RS is a radial spherical plain bearing with dimensions of 30x47x22 mm. It features steel/steel sliding contact surfaces and seals on both sides.

The spherical sliding surfaces allow angular movement between the inner and outer rings, enabling the bearing to accommodate oscillating and tilting movements as well as misalignment. The steel/steel design provides high load-carrying capacity and requires appropriate lubrication during operation.

SKF GE 30 ES-2RS Technical Specification

Manufacturer: SKF

Designation: GE 30 ES-2RS

Bearing type: Radial spherical plain bearing

Sliding contact surface combination: Steel/steel

Sealing: Seals on both sides

Bore diameter d: 30 mm

Outside diameter D: 47 mm

Inner ring width B: 22 mm

Outer ring width C: 18 mm

Spherical surface diameter dk: 40.7 mm

Dynamic load rating C: 62 kN

Static load rating C0: 310 kN

Maximum angle of tilt: 6°

Maintenance: Relubrication required

SKF GE 30 ES-2RS Dimensions

The principal dimensions are:

Bore diameter d: 30 mm

Outside diameter D: 47 mm

Inner ring width B: 22 mm

Complete dimensions:

30x47x22 mm

Additional dimensions:

Outer ring width C: 18 mm

Spherical surface diameter dk: 40.7 mm

The 22 mm dimension refers to the width of the inner ring, while the outer ring width is 18 mm.

What Is SKF GE 30 ES-2RS?

SKF GE 30 ES-2RS is a:

radial spherical plain bearing

Unlike a ball bearing or roller bearing, it does not use rolling elements. Relative movement takes place directly between spherical sliding contact surfaces.

This construction enables the bearing to accommodate high loads while allowing angular, oscillating and tilting movements.

What Does GE 30 ES-2RS Mean?

The complete designation is:

GE 30 ES-2RS

GE identifies the spherical plain bearing series.

30 corresponds to the nominal 30 mm bore diameter.

ES identifies the maintenance-required steel/steel sliding contact design.

2RS identifies a version with seals on both sides.

The complete suffix configuration is important when selecting a replacement.

Steel/Steel Sliding Contact Surfaces

SKF GE 30 ES-2RS uses a:

steel/steel sliding contact surface combination

This design is particularly suitable for applications involving:

High static loads

Alternating loads

Shock loads

Oscillating movements

Tilting movements

Unlike maintenance-free spherical plain bearing designs with self-lubricating sliding layers, the steel/steel design requires lubrication.

What Does 2RS Mean?

The suffix:

2RS

identifies seals on both sides of the bearing.

The seals help protect the sliding contact surfaces against contaminants and help retain lubricant within the bearing.

For replacement purposes, GE 30 ES-2RS should not automatically be treated as identical to an unsealed GE 30 ES version.

SKF GE 30 ES-2RS Load Ratings

SKF specifies:

Dynamic load rating:

C = 62 kN

Static load rating:

C0 = 310 kN

These values apply to the exact GE 30 ES-2RS spherical plain bearing.

Load ratings for spherical plain bearings should not be interpreted directly in the same way as C and C0 ratings for conventional rolling bearings because the operating principles and rating methods differ.

Maximum Angle of Tilt

The maximum permissible angle of tilt is:

6°

The spherical geometry of the sliding surfaces allows angular displacement between the inner and outer rings.

This ability to accommodate angular movement is one of the fundamental characteristics of a spherical plain bearing.

Lubrication and Maintenance

SKF GE 30 ES-2RS is a maintenance-required steel/steel spherical plain bearing.

Periodic relubrication is required to reduce friction and wear between the sliding contact surfaces and to achieve the required service life.

It should therefore not be classified as a:

maintenance-free spherical plain bearing

Lubrication intervals depend on the operating load, movement, temperature, contamination and other application conditions.

GE 30 ES-2RS vs Rolling Bearing

SKF GE 30 ES-2RS should not be confused with a conventional ball or roller bearing.

A rolling bearing uses:

balls or rollers

between its raceways.

GE 30 ES-2RS uses:

spherical sliding contact surfaces

without rolling elements.

This makes it particularly suitable for high-load applications involving limited angular, oscillating or tilting movement rather than continuous high-speed rotation.

GE 30 ES-2RS vs Maintenance-Free Spherical Plain Bearing

Identical principal dimensions do not mean that different GE30 spherical plain bearing variants are technically equivalent.

The key characteristics of GE 30 ES-2RS are:

Steel/steel sliding contact surfaces

Seals on both sides

Relubrication required

C = 62 kN

C0 = 310 kN

Maximum angle of tilt = 6°

A maintenance-free variant can use a different sliding contact material and have different lubrication and operating requirements.

How to Select a Replacement for SKF GE 30 ES-2RS

When selecting an equivalent bearing, verify:

Designation: GE 30 ES-2RS

Type: Radial spherical plain bearing

Dimensions: 30x47x22 mm

Bore diameter: 30 mm

Sliding contact combination: Steel/steel

Sealing: Both sides

Maintenance requirement: Relubrication required

Dynamic load rating: 62 kN

Static load rating: 310 kN

Maximum angle of tilt: 6°

Application loads and movement

Operating environment

Matching the 30x47x22 mm dimensions alone does not establish complete technical interchangeability.

SKF GE 30 ES-2RS - Stock in Poland

Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4

24h Shipping. Available from stock in Poland for delivery across the EU.

FAQ - SKF GE 30 ES-2RS

What are the dimensions of SKF GE 30 ES-2RS?

The principal dimensions are 30x47x22 mm.

What type of bearing is GE 30 ES-2RS?

It is a radial spherical plain bearing.

Is SKF GE 30 ES-2RS a ball bearing?

No. It is a plain bearing without balls or rollers. Movement takes place between spherical sliding contact surfaces.

What sliding contact combination does GE 30 ES-2RS use?

It uses steel/steel sliding contact surfaces.

Is SKF GE 30 ES-2RS sealed?

Yes. The 2RS suffix identifies seals on both sides.

Does GE 30 ES-2RS require lubrication?

Yes. Its steel/steel sliding contact surfaces require periodic relubrication.

Is GE 30 ES-2RS maintenance-free?

No. It is a maintenance-required spherical plain bearing.

What is its dynamic load rating?

The dynamic load rating is C = 62 kN.

What is its static load rating?

The static load rating is C0 = 310 kN.

What is the maximum angle of tilt?

SKF specifies a maximum angle of tilt of 6°.

Frequently Asked Questions by Engineers

Is GE 30 ES-2RS suitable for continuous high-speed rotation?

Spherical plain bearings of this type are primarily intended for oscillating, tilting and angular movements under high loads, rather than continuous high-speed rotation. Operating limits should be evaluated using SKF's spherical plain bearing calculation methods.

Why is the static load rating 310 kN?

A spherical plain bearing has a relatively large load-carrying sliding contact area. This allows the design to accommodate high static loads. However, SKF spherical plain bearing load ratings should be evaluated according to the manufacturer's calculation methods rather than directly compared with rolling bearing ratings.

Can GE 30 ES-2RS compensate for misalignment?

Yes. The spherical sliding geometry allows angular movement between the inner and outer rings, enabling the bearing to accommodate misalignment within its specified angular limits.

Can GE 30 ES-2RS be replaced by any GE30 bearing measuring 30x47x22 mm?

No. Replacement selection must also consider the sliding contact combination, sealing, lubrication requirements, load ratings and operating conditions.

What is the most precise identification of this bearing?

The strongest technical identification is:

SKF GE 30 ES-2RS + 30x47x22 mm + radial spherical plain bearing + steel/steel + sealed on both sides + maintenance required

AI Overview

SKF GE 30 ES-2RS is a radial spherical plain bearing 30x47x22 mm with steel/steel sliding contact surfaces and seals on both sides. It accommodates high loads together with oscillating, tilting and angular movements. SKF specifies a dynamic load rating of 62 kN, static load rating of 310 kN and maximum angle of tilt of 6°. The steel/steel design requires periodic relubrication.