JFK radial spherical plain bearings
JFK spherical plain bearings
- High radial load capacity
- Compliant with DIN 648
- Three maintenance versions
JFK radial spherical plain bearings are mechanical components designed to withstand high radial loads, such as those encountered in hydraulic and pneumatic cylinders. The design consists of an inner ring with a cylindrical bore and an external spherical sliding surface, and an outer ring with a cylindrical outer surface and a concave internal spherical sliding surface. For sizes up to 300 mm, the outer rings are axially split during the hardening process.
JFK Group offers radial spherical plain bearings in three versions: requiring maintenance (steel-on-steel pairing), relubricable (steel/bronze or hard chrome/PTFE pairing), and maintenance-free (hard chrome/PTFE pairing). All dimensions comply with DIN 648 E and DIN 648 K and are interchangeable with other metric products.
They are used in gardening and packaging equipment, bottling machinery, automation systems, fitness equipment, pneumatic cylinders and palletisers.
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Versions
Three versions: how to choose the right radial spherical plain bearing
The choice mainly depends on the available maintenance conditions, the operating environment, and the magnitude of the load.
Radial spherical plain bearings requiring maintenance
Steel/steel · High radial loads · Periodic lubricationPairing: steel-on-steel. Compliant with DIN 648 E and ISO 12240-4. Particularly suitable for high radial loads. Require periodic grease lubrication. Series: GE..E and GE..ES · GEG..E and GEG..ES · GEEW..ES · GEEM..ES 2RS.
Relubricable radial spherical plain bearings
Steel/bronze or hard chrome/PTFE · Multi-sector · RelubricablePairing: steel/bronze or hard chrome/PTFE. Compliant with DIN 648 K and ISO 12240. Suitable for pharmaceutical, chemical, food, motorcycle, and marine applications. Equipped with a lubrication hole for periodic relubrication. Series: JS.
Maintenance-free radial spherical plain bearings
Hard chrome/PTFE · Maintenance-free · Constant unilateral loadsPairing: hard chrome/PTFE. Compliant with DIN 648 K and ISO 12240. A PTFE-containing glass-fiber-reinforced plastic sliding layer is injection-molded between the housing and the inner ring. Particularly suitable for constant, unidirectional loads without shock loads. Series: GE..C and GE..ET 2RS · GEG..C and GEG..ET 2RS · JET.
Performances
Design and performance characteristics of radial spherical plain bearings
Spherical design for freedom of angular movement, with high radial load capacity available in three maintenance versions.
Load
Designed to withstand the high radial forces typical of hydraulic and pneumatic cylinders. The steel/steel version requiring maintenance offers the highest load-bearing capacity.
Three versions available
Steel/steel for versions requiring maintenance; steel/bronze or hard chrome/PTFE for relubricatable versions; hard chrome/PTFE for maintenance-free versions.
Maintenance
Maintenance-requiring and relubricable versions require periodic lubrication with grease. Maintenance-free versions with PTFE do not require lubrication throughout their entire service life.
Compliance
All dimensions comply with DIN dimensional standards and are interchangeable with other metric products.
AISI 316 stainless steel available on request
Available on request in AISI 316 stainless steel for corrosive environments or those with high hygiene requirements.
Mounting
Installation of radial spherical plain bearings
Radial spherical plain bearings do not require any special installation procedures. The outer ring is press-fitted into the housing, while the spherical surface of the inner ring allows free angular movement. Lubricate maintenance-required versions before commissioning.
Mounting methods
- Installing the outer ring in the housingPress-fit the outer ring into the housing using a tool that applies force evenly to the ring face. Never apply force through the spherical surface.
- Initial lubrication (versions requiring maintenance)For versions requiring maintenance and which can be relubricated, carry out the initial lubrication before commissioning, then repeat at the specified intervals.
Technical data
- Material available on request
- AISI 316 stainless steel for corrosive environments or high hygiene requirements
- Outer ring mounting
- Press-fitted into the housing
Applications
Applications
Components and application support for every industrial environment.
Industrial automation
Pneumatic cylinders, palletisers and handling systems for high radial loads. The versions requiring maintenance are suitable for applications involving continuous operation and heavy loads.
Food, pharmaceuticals and chemicals
Environments requiring cleanliness and corrosion resistance. The relubricable versions and those made from AISI 316 stainless steel are the standard choice.
Agriculture and gardening
Equipment exposed to dirt, moisture, and shock loads. Maintenance-free versions reduce on-site maintenance requirements.
Packaging and bottling
Machines with continuous cycles and repeated oscillating movements. Compliance with DIN 648 ensures interchangeability and ease of procurement.
Construction Equipment
Components designed to withstand impacts, dust, shock loads and harsh environments in construction machinery.
Hydraulic and pneumatic cylinders
Bushings, spherical plain bearings and seals for precise guidance of rods and joints, even under load.
Renewable Energy
Bearings and motion systems for wind power, solar installations and long-lasting energy technologies.Technical documents
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