GEG..C Series — Heavy-Duty Maintenance-Free Spherical Plain Bearing PTFE Composite Lined

GEG..C — 9 bore sizes · d 6–30 mm · Maintenance-free · Higher load than GE..C · Larger misalignment.

MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.


Spherical Plain Bearings › Heavy-Duty Maintenance-Free

GEG..C Series — Heavy-Duty Maintenance-Free Spherical Plain Bearing PTFE Composite Lined

9 bore sizes · d 6–30 mm · Maintenance-free · Higher load than GE..C · Larger misalignment

Maintenance-FreeHeavy-DutyPTFE Liner9 Sizes 6–30mmLarger Misalignment Angle

🆕 Series Overview

The GEG..C series provides heavy-duty maintenance-free spherical plain bearings combining the PTFE composite liner of the GE..C series with the larger outer diameter and higher load ratings of the GEG heavy-duty designation. Available in 9 bore sizes from 6 mm to 30 mm.

GEG..C bearings have a greater outer diameter and larger spherical raceway than GE..C for the same bore, delivering higher dynamic and static load ratings and a larger rated misalignment angle. The construction — outer ring pressed around the chromium-plated inner ring — is identical to GE..C. Specified when GE..C load capacity or misalignment angle is insufficient and the application prohibits re-lubrication.

GEG..C spherical plain bearing product view

⚙ Key Design Features

📈

Higher Load Than GE..C

Larger outer diameter and raceway provide higher dynamic and static load ratings than GE..C for the same bore size.

🔁

Larger Misalignment Angle

Greater rated α than GE..C for the same bore — suitable for applications with larger structural angular deflections.

🔧

Maintenance-Free

PTFE composite liner. No re-lubrication required. Same liner construction as GE..C.

🔭

Chromium-Plated Inner Ring

Inner ring spherical surface chromium-plated HRC 58+. Compatible with PTFE composite without metallic wear.

✅

Pressed Construction

Outer ring pressed around inner ring. No axial split — compact and rigid construction.

📈

Food & Clean Room Grade

No grease contamination risk. Suitable for food processing, pharmaceutical, and clean-room environments.

📋 Complete Specification Table

ⓘ Load ratings in kN. GEG..C has larger D than GE..C for same bore — verify housing bore. d1 = inner ring shoulder diameter. dk = contact diameter. Weight in grams.

Part Number d (mm) D (mm) B (mm) C (mm) d1 min (mm) dk (mm) R1s R2s α° Dyn C (kN) Sta Co (kN) Wt (g)
GEG 6 C 6 16 9 5 9 13 0.3 0.3 21 5.8 14 8
GEG 8 C 8 19 11 6 11 16 0.3 0.3 21 8.6 21 14
GEG 10 C 10 22 12 7 13 18 0.3 0.3 18 11 28 21
GEG 12 C 12 26 15 9 16 22 0.3 0.3 18 18 45 33
GEG 15 C 15 30 16 10 19 25 0.3 0.3 16 22 56 49
GEG 17 C 17 35 20 12 21 29 0.3 0.3 19 31 78 83
GEG 20 C 20 42 25 16 24 35.5 0.6 0.6 17 51 127 153
GEG 25 C 25 47 28 18 29 40.7 0.6 0.6 17 65 166 203
GEG 30 C 30 55 32 20 34 47 0.6 0.6 17 83 212 304
GEG..C dimensional drawing

🔄 Interchange / Cross-Reference Table

GBC spherical plain bearings are dimensionally interchangeable with the following major brand designations:

GBC SKF FAG ELGES IKO NTN NMB
GE..E(S) GE..E GE..E GE..DO GE..E SA1~..B SBH..NS
GE..ES 2RS GE..ES GE..ES GE..DO 2RS GE..ES 2FRS SA1~..BSS SBH..S
GEG..E(S) GEH..E GEH..E GE..FO GEG..E GE..G —
GE..C GE..C GE..C GE..UK GE..C SAR1~... —
GE..ET 2RS GE..TE 2TS GE..UA 2RS GE..UK 2RS GE..ET 2RS — —
PB — — GE..PB GEBK..S PB.. —

🔭 Materials & Construction

Identical PTFE composite liner construction to GE..C, bonded to the larger-OD GEG outer ring. Inner ring spherical surface chromium-plated. Outer ring pressed around inner ring during assembly — no axial split.

🔭

PTFE Composite Liner

Bonded to larger GEG outer ring bore. Same friction and temperature properties as GE..C liner.

🔎

Chromium-Plated Inner Ring

HRC 58+ surface hardness. Corrosion-resistant running surface.

✅

Pressed Construction

Outer ring pressed around inner ring. More compact than split-ring GEG..ES for equivalent bore.

🏭 Typical Applications

💊

Heavy Medical Equipment

Large-format imaging system positioning mechanisms and surgical table heavy-duty pivot joints requiring maintenance-free operation with higher loads than GE..C.

🍽

Industrial Food Equipment

Heavy-duty food processing machinery pivot joints — portioning press linkages and heavy conveyor drives — requiring grease-free operation at higher loads.

🔧

Heavy Automation

Industrial robot pivot joints and heavy-duty actuator linkages in sealed assemblies where re-lubrication is impractical and load exceeds GE..C capacity.

⚙

Precision Machine Pivots

Heavy precision machine tool tilting table pivots and fixture adjustment mechanisms requiring maintenance-free high-load spherical accommodation.

📈

Renewable Energy Equipment

Solar tracker pivot joints and wind turbine blade pitch bearings in remote installations where maintenance access is limited and load exceeds GE..C ratings.

🔎

Scientific & Metrology Equipment

Heavy laboratory gantry pivot joints and large-format measurement machine joints requiring clean, maintenance-free spherical accommodation under higher loads.

GEG..C bearing in application

🔧 Installation & Maintenance

🔎 Housing Bore

H7 for standard installation. GEG..C outer diameter is larger than GE..C for the same bore — existing GE..C housings cannot accept GEG..C without re-machining.

🔧 Shaft Tolerance

h6 for press fit; f7 for sliding fit. Do not apply grease to inner ring spherical surface.

📈 No Lubrication at Contact

PTFE liner is the lubricant. Never apply grease to the spherical contact surface — it attracts abrasive contamination and does not improve performance.

⚙ Contamination Protection

Use sealed housings in contaminated environments. GEG..C without seals is suitable for clean or lightly contaminated conditions.

🌡 Temperature Limit

Same as GE..C: PTFE liner rated to +200°C dry; housing and shaft material typically limit practical operation to +150°C.

✅ End-of-Life

Replace when detectable play develops. PTFE liner cannot be replenished. Higher load capacity of GEG..C typically extends service life compared with GE..C under equivalent loads.

🔎 Selection Guide

Select GEG..C when GE..C load rating or misalignment angle is insufficient and grease is prohibited. Note that GEG..C outer diameter is larger — existing GE..C housings require re-machining.

①

Identify Load Type

Confirm re-lubrication is impractical or grease is prohibited. Confirm load or misalignment exceeds GE..C rated values.

②

Select Bore & Series

Match bore d to shaft. Verify larger GEG..C outer diameter D fits available housing. Check B dimension against housing depth.

③

Verify Misalignment Angle

Verify C ≥ equivalent load. Check α ≤ GEG..C rated misalignment angle. Confirm oscillating motion only.

④

Contact Us

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

❓ Frequently Asked Questions

▶ What does 'maintenance-free' mean for GE..C and GEG..C bearings?

Maintenance-free means no re-lubrication is required under normal operating conditions for the rated service life. The PTFE composite liner between the inner ring spherical surface and the outer race acts as a dry-running lubricant. However, the bearing should be protected from excessive contamination, chemical exposure, and temperatures above the PTFE liner's rated limit — conditions that degrade the liner without the possibility of re-lubrication correction.

▶ What is the service life of a maintenance-free bearing?

Service life depends on load, oscillation frequency, and amplitude. Under rated load at normal oscillation conditions (±5° amplitude at 0.1 Hz), typical liner life is 50,000–200,000 oscillation cycles. Larger amplitudes, higher loads, or higher frequencies shorten liner life proportionally. When detectable play develops, the bearing has reached end of life and must be replaced.

▶ Can GE..C bearings run at continuous rotation?

No. PTFE-lined maintenance-free bearings are designed for oscillating and slowly tilting motion. Continuous rotation generates heat that exceeds the PV limit of the PTFE liner, causing rapid deterioration. For continuous rotation under misalignment, use the GE..ES series with regular re-lubrication instead.

▶ What shaft and housing fit is recommended for maintenance-free bearings?

The outer ring of GE..C is pressed into the housing (outer ring pressed aroud inner ring construction). The inner ring bore uses the same shaft tolerances as the GE..ES series: h6 for press fit, f7 for sliding fit. The PTFE liner is bonded to the outer race spherical surface — do not apply grease to this surface, as it degrades the PTFE composite.

▶ Can maintenance-free bearings be used outdoors?

Yes, provided the bearing is shielded from direct UV exposure and chemical contamination. PTFE itself is chemically inert and moisture-resistant. However, if the bearing is installed in a housing without seals, debris ingress can abrade the PTFE liner. Use sealed housings or add protective covers for outdoor installations.

📞 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.

GEG..C — 9 bore sizes · d 6–30 mm · Maintenance-free · Higher load than GE..C · Larger misalignment.

MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.

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