Maintenance-Free

PTFE composite liner provides dry lubrication at the spherical contact surface. No re-lubrication required under normal operating conditions.

PTFE Composite Liner

Outer race lined with PTFE composite material. Combines low friction coefficient with load-bearing capacity for oscillating applications.

Chromium-Plated Inner Ring

Inner ring spherical surface chromium-plated for hardness and corrosion resistance. Compatible with PTFE composite liner without metallic wear.

Compact Design

Outer ring pressed around inner ring (no axial split) — smaller overall envelope than equivalent ES series for the same bore.

Food Grade Compatible

No grease contamination risk. Suitable for food processing, pharmaceutical, and medical equipment where lubricant-free operation is required.

Wide Temperature Range

PTFE liner rated −50°C to +200°C dry. Operational range limited by inner ring chromium plating and housing material, not the liner.

PTFE Composite Liner

Bonded to outer ring spherical bore. Friction coefficient 0.03–0.10 (dry). No grease required. Rated to +200°C dry.

Chromium-Plated Inner Ring

HRC 58+ surface hardness. Corrosion-resistant. Compatible running surface with PTFE composite liner.

Pressed-Around Construction

Outer ring pressed around inner ring — no axial split. More compact envelope than ES series for equivalent bore.

Medical Equipment

Surgical table adjustment mechanisms, diagnostic instrument positioning, and rehabilitation equipment joints where grease contamination is unacceptable.

Food Processing

Conveyor pivot joints, filling machine linkages, and portioning equipment bearings in food-contact zones where lubricant-free operation is mandatory.

Clean Room Automation

Semiconductor handling equipment and optical instrument linkages in clean-room environments where particulate grease would cause yield loss.

Sealed Assemblies

Maintenance-free bearings in hermetically sealed mechanisms, actuators, and instruments where re-lubrication access is physically impossible after assembly.

Aerospace Ground Equipment

Ground support equipment linkages and actuator joints where scheduled re-lubrication is difficult in field conditions.

Scientific Instruments

Telescope mount pivot joints, spectrometer sample stages, and precision measurement instrument linkages requiring consistent low-friction, clean operation.

🔎 Housing Bore

H7 for standard installation. The outer ring is pressed into the housing in the same way as GE..ES — use a press tool on the outer ring end face.

🔧 Shaft Tolerance

h6 for press fit; f7 for sliding fit. Do not use grease on the inner ring spherical surface — this degrades the PTFE composite liner.

📈 No Lubrication

Do not apply grease to the spherical contact surface. The PTFE liner IS the lubricant. Applying grease to the contact surface does not improve performance and may attract abrasive contamination.

⚙ Contamination Protection

Protect the bearing from abrasive particles. While the PTFE liner tolerates chemical contamination well, abrasive debris entering the spherical contact accelerates liner wear. Use sealed housings in contaminated environments.

🌡 Operating Temperature

Limit continuous operating temperature to +120°C for steel housings. The PTFE liner can withstand higher temperatures, but housing expansion at elevated temperatures may affect the outer ring fit.

✅ End-of-Life Indication

When detectable radial play develops in the bearing, the PTFE liner is worn and the bearing must be replaced. Unlike GE..ES, the liner cannot be replenished by re-lubrication.

①

Identify Load Type

Confirm re-lubrication is impractical or grease is prohibited. If re-lubrication is feasible, GE..ES provides higher load ratings for the same bore.

②

Select Bore & Series

Match bore d to shaft nominal. Verify outer diameter D and width B. Note GE..C OD differs from GE..ES for the same bore.

③

Verify Misalignment Angle

Confirm oscillating motion only. Verify dynamic load rating C ≥ required equivalent load. Check α angle does not exceed rated misalignment.

④

Contact Us

MOQ 100 units. Contact our team with bore diameter, load case, misalignment angle, oscillation frequency, and operating environment.

📞 Ready to Order?

MOQ is 100 units per model. Provide bore diameter, housing bore, radial and axial loads, misalignment angle, oscillation amplitude and frequency, and operating environment. All catalogue data is for reference only — verify against current drawings before finalising design.