GE30-DO INA 30x47x22 mm - Radial Spherical Plain Bearing

Product Description

GE30-DO INA 30x47x22 mm is a radial spherical plain bearing manufactured under the INA brand, part of the Schaeffler Group. It features a 30 mm bore diameter, 47 mm outside diameter and 22 mm inner ring width. Its spherical sliding surfaces allow the bearing to accommodate radial loads, oscillating movements and angular misalignment between connected mechanical components.

Unlike conventional rolling bearings, GE30-DO does not contain balls or rollers. Its operating principle is based on sliding contact between the convex spherical surface of the inner ring and the corresponding concave surface of the outer ring.

The bearing features a steel-on-steel sliding contact combination and requires lubrication and periodic maintenance. It is designed for mechanical joints and articulated connections operating under appropriate loading conditions.

Technical Specifications - INA GE30-DO

The dimensional and performance values listed above correspond to catalogue information for the GE30-DO bearing design.

Load ratings for spherical plain bearings must not be interpreted in exactly the same way as the fatigue-life ratings used for conventional rolling bearings.

Actual operating suitability depends on the load, sliding velocity, lubrication, temperature and bearing arrangement.

What Does GE30-DO INA Mean?

GE - Radial Spherical Plain Bearing

GE identifies a radial spherical plain bearing with spherical sliding contact surfaces.

The bearing is designed to permit relative angular movement between its inner and outer rings.

30 - Nominal Bore Diameter

The number 30 identifies the nominal bore diameter of 30 mm.

DO - Steel-on-Steel Sliding Contact

The DO suffix identifies a steel-on-steel sliding contact configuration.

This is a maintenance-required design intended for appropriately lubricated mechanical joints.

INA - Manufacturer Brand

INA is a bearing and industrial motion technology brand belonging to the Schaeffler Group.

Construction and Operating Principle

Inner Ring

The inner ring has a bore diameter of 30 mm and a convex spherical outside surface.

This surface slides against the matching concave spherical surface of the outer ring.

The inner ring width is 22 mm.

Outer Ring

The outer ring has an outside diameter of 47 mm and a width of 18 mm.

Its concave spherical raceway provides the mating sliding surface for the inner ring.

The geometry allows angular displacement between the two rings.

Steel-on-Steel Sliding Contact

The GE30-DO bearing uses a steel-on-steel sliding contact combination.

This design can accommodate substantial mechanical loads when correctly selected and lubricated.

However, sliding contact generates friction and wear, making suitable lubrication essential.

Lubrication helps reduce friction, limit surface wear and protect the contacting surfaces.

Oscillating Movement and Angular Misalignment

The bearing permits oscillating movements and angular displacement between connected components.

The catalogue maximum angular misalignment for GE30-DO is 6°.

This value does not mean that unrestricted angular movement is permissible under every load or operating condition.

The actual application must account for load magnitude, sliding velocity, lubrication and operating temperature.

Radial and Axial Load Characteristics

Radial Loads

GE30-DO is primarily designed to accommodate radial loads acting perpendicular to the bearing axis.

The bearing's spherical sliding surfaces distribute the load through the contact area between the rings.

Axial Load Components

Spherical plain bearings may accommodate axial load components in combination with radial loading, subject to the manufacturer's limits.

GE30-DO should not be selected as a dedicated axial spherical plain bearing.

Static and Dynamic Loading

The listed static radial load rating C0r is 311,000 N.

The listed dynamic radial load rating Cr is 62,300 N.

These ratings are used in the selection and assessment of spherical plain bearings. They are not direct guarantees of service life or permissible operating load under every condition.

The actual load capacity depends on the complete application, including lubrication, sliding movement and operating conditions.

INA GE30-DO vs GE30-DO-2RS

GE30-DO - Open Version

The standard GE30-DO design does not include integrated seals.

It requires appropriate lubrication and protection against contamination according to the operating environment.

GE30-DO-2RS - Sealed Version

The GE30-DO-2RS variant incorporates seals on both sides.

These seals provide additional protection against contamination but do not eliminate the need for proper lubrication and maintenance.

GE30-DO and GE30-DO-2RS are different product variants and should not be considered automatically interchangeable.

Alternative Designations and Search References

The product may be identified using the following designation variants:

• GE 30 DO INA

• GE30-DO INA

• INA GE30-DO

• GE30DO INA

• GE 30 DO 30x47x22

• INA spherical plain bearing 30x47x22

• GE30-DO radial spherical plain bearing

• INA GE30-DO steel-on-steel bearing

• GE30-DO articulated joint bearing

These are alternative written forms and descriptive references, not verified cross-manufacturer replacement part numbers.

Bearing Selection and Interchangeability

Before purchasing INA GE30-DO, verify the following technical requirements:

1. Complete designation: GE30-DO.

2. Manufacturer: INA / Schaeffler.

3. Bore diameter: 30 mm.

4. Outside diameter: 47 mm.

5. Inner ring width: 22 mm.

6. Outer ring width: 18 mm.

7. Sliding contact combination: Steel-on-steel.

8. Sealing arrangement: Open, without integrated seals.

9. Lubrication: Suitable for the application.

10. Radial load: Within the permissible operating limits.

11. Axial load components: Compatible with the bearing design.

12. Angular misalignment: Within the specified range.

13. Operating temperature: Suitable for the bearing and lubricant.

14. Environmental conditions: Appropriate protection against contamination and corrosion.

Identical dimensions of 30x47x22 mm do not automatically guarantee full interchangeability between spherical plain bearings.

Bearings with steel-on-steel, steel-on-PTFE or other sliding contact combinations may have significantly different lubrication requirements, friction characteristics and permissible operating conditions.

Typical Applications

Radial spherical plain bearings of the GE30-DO type are used in mechanical assemblies requiring articulated movement and the transmission of substantial loads.

Typical applications include:

• Industrial machinery joints.

• Mechanical linkage systems.

• Oscillating mechanisms.

• Hydraulic cylinder connections.

• Agricultural machinery.

• Construction equipment.

• Material handling machinery.

• Articulated structures and pivot connections.

These are general applications of spherical plain bearings, not confirmed OEM applications of the exact INA GE30-DO designation.

Final suitability must be assessed according to the actual load, movement, lubrication and installation conditions.

Installation, Lubrication and Maintenance

Preparation Before Installation

Inspect the shaft, pin and housing bore before mounting.

The mating surfaces should be clean, undamaged and manufactured to the required tolerances.

Bearing Installation

Apply mounting force directly to the ring being installed with an interference fit.

Do not transmit installation force through the spherical sliding contact surfaces.

Use appropriate mounting tools to avoid damaging the bearing rings.

Lubrication

INA GE30-DO is a maintenance-required spherical plain bearing.

Its steel-on-steel sliding contact surfaces must receive suitable lubrication.

The lubricant and relubrication intervals should be selected according to the manufacturer's recommendations and the actual operating conditions.

Protection Against Contamination

The open GE30-DO version does not have integrated side seals.

In dusty, wet or otherwise contaminated environments, additional external protection may be necessary.

Wear Inspection

During maintenance, inspect the bearing for excessive clearance, surface damage, corrosion and inadequate lubrication.

Increasing play, irregular movement or abnormal noise may indicate wear or unsuitable operating conditions.

Storage

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

Protect the sliding surfaces against moisture, dust and mechanical damage.

Frequently Asked Questions - INA GE30-DO

1. What are the dimensions of INA GE30-DO?

The bearing has a 30 mm bore diameter, 47 mm outside diameter, 22 mm inner ring width and 18 mm outer ring width.

2. Is GE30-DO a ball bearing?

No. It is a spherical plain bearing that operates through sliding contact between spherical surfaces rather than rolling elements.

3. What does DO mean in GE30-DO?

The DO suffix identifies the steel-on-steel sliding contact design, which requires lubrication and maintenance.

4. Does INA GE30-DO require lubrication?

Yes. It is a maintenance-required spherical plain bearing, and its sliding surfaces must be adequately lubricated.

5. Does GE30-DO have seals?

No. The standard GE30-DO is an open bearing. The GE30-DO-2RS variant has seals on both sides.

6. What is the maximum angular misalignment?

The catalogue maximum angular misalignment is 6°, subject to the operating conditions and bearing arrangement.

7. Can GE30-DO be replaced with GE30-DO-2RS?

Not automatically. The sealing arrangement, lubrication requirements and installation conditions must be checked before replacement.

8. What is INA GE30-DO used for?

It is used in mechanical joints requiring radial load support, oscillating movement and angular displacement between connected components.

INA GE30-DO 30x47x22 mm - Key Information

INA GE30-DO is a radial spherical plain bearing with dimensions of 30x47x22 mm and an outer ring width of 18 mm. It features steel-on-steel sliding contact, an open construction and maintenance-required lubrication. The bearing accommodates oscillating movement and angular misalignment up to 6°, making it suitable for appropriately designed articulated mechanical connections.

INA spherical plain bearings and other industrial components are offered through simmering.pl, a specialist supplier of bearings, oil seals and technical parts.

The company operates a warehouse in Lublin, Poland, serving industrial customers, maintenance departments and B2B purchasing teams, with shipping throughout Poland, the European Union and international markets.