INA Spherical plain bearings allow spatial adjustment movements and, depending on the bearing type, can support radial, combined or axial loads.
INA radial spherical plain bearings
INA maintenance-free radial spherical plain bearings comprise inner rings, outer rings and maintenance-free sliding layers. The inner rings have a cylindrical bore with a curved outer slideway.
The outer rings have a cylindrical outside surface and a concave inner slideway.
Between the inner and outer ring is an ELGOGLIDE sliding surface. The sliding surface in the series GE..-UK and GE..-FW is PTFE composite, while the sliding surface in series GE..-PW is PTFE film.
INA bearings are available in open and sealed designs.
INA radial spherical plain bearings are preferably used to support radial forces. GE..-UK-2RS(-2TS), GE..-FW-2RS(-2TS), GE..-DW and GE..-DW-2RS2 are also suitable for alternating loads up to a contact pressure of p = 150 N/mm2. The bearings are used where particular requirements for operating life apply in conjunction with maintenance-free operation or where, for reasons of lubrication, bearings with metallic sliding contact surfaces are not suitable, for example under unilateral load.
INA Large radial spherical plain bearings GE..-DW and GE..-DW-2RS2 of d >= 320 mm are X-life bearings and are indicated as such in the dimension tables.
These bearings have even higher performance materials, lower coefficients of friction and lower running-in wear than comparable bearings.
Split outer ring
In series GE..-UK-2RS(-2TS) up to a diameter d <= 140 mm, the outer ring is axially split at one point, while for diameters d >= 160 mm it is axially split at two points and held together by means of heavysection retaining washers.
In the case of bearings GE..-FW-2RS(-2TS) up to a diameter d <= 120 mm, the outer ring is axially split at one point, while for diameters d >= 140 mm it is axially split at two points and held together by means of heavy-section retaining washers. In the case of GE..-DW and GE..-DW-2RS2, the outer ring is radially split. It is held together by means of screws and dowel pins.
Extended inner rings
GE..-FW-2RS(-2TS) and GE..-FW have extended inner rings. As a result, larger tilt angles are possible.
Series and design
|series||Sliding layer||DIN ISO||dimension series||shaft d mm|
INA angular contact spherical plain bearings
INA angular contact spherical plain bearings GE..-SW correspond to DIN ISO 12240-2. They have inner rings with a curved outer slideway and outer rings with a concave inner slideway to which the sliding layer ELGOGLIDE is attached by adhesive.
The bearings are available for shaft diameters from 25 mm to 200 mm. Other sizes are available by agreement.
Area of application
INA bearings can support radial and axial loads and are suitable for alternating dynamic loads. They can be used in paired arrangements as preloaded units.
INA angular contact spherical plain bearings are used to support high loads occurring in conjunction with small motions. They are a good plain bearing alternative to tapered roller bearings 320..-X in accordance with ISO 355 and DIN 720, since they have the same mounting dimensions.
INA thrust spherical plain bearings
Axial spherical plain bearings GE..-AW correspond to DIN ISO 12240-3. In these units, the shaft locating washer is supported in the ball socket-shaped sliding zone of the housing locating washer.
The sliding material in the housing locating washer is ELGOGLIDE or, in the case of a nominal diameter d >= 220 mm, ELGOGLIDE in X-life.
INA bearings are available for shaft diameters from 10 mm to 360 mm. Other sizes are available by agreement.
The bearings are preferably used to support axial forces. They are suitable as support or base bearings and can also be combined with radial spherical plain bearings of dimension series E in accordance with DIN ISO 12240-1.