Angular Misalignment

Spherical sliding contact accommodates angular misalignment between shaft and housing axes. Misalignment angle α listed in specification table for each size.

2RS Lip Seals

Outer ring lip seals on both sides retain grease and exclude contamination. Suitable for dusty, wet, and outdoor environments without additional housing seals.

ES Lubrication Grooves

Circumferential groove and radial holes in both outer and inner rings distribute re-lubrication grease evenly across the full spherical contact surface.

Single Axial Split

Outer ring has one axial split enabling installation by pressing the inner ring axially through the outer ring bore — no disassembly of adjacent components required.

Phosphate Surface Treatment

Both outer and inner rings are phosphate-treated to improve corrosion resistance and initial grease adhesion at the sliding contact surface.

23 Bore Sizes

6 mm to 160 mm covering light instrument linkages through heavy industrial pivot joints and hydraulic cylinder clevis pins.

100Cr6 Chrome Steel

Inner and outer rings HRC 58–64. Spherical surfaces ground and lapped to Ra 0.1–0.2 µm.

Phosphate Treatment

Applied to both rings for corrosion resistance and improved grease adhesion at the sliding contact.

NBR Seals (2RS)

Lip seals −30°C to +110°C. FKM seals available for elevated temperature duty above +110°C.

Hydraulic Cylinders

Clevis-pin joints at cylinder rod and barrel ends require spherical plain bearings to accommodate the angular misalignment that develops as the cylinder extends and the load point shifts.

Agricultural Machinery

Linkage pivot joints in ploughs, cultivators, and baler mechanisms use GE..ES bearings for their self-aligning capability and tolerance of intermittent contamination.

Construction Equipment

Boom hinge pins, bucket linkage pivots, and outrigger pad joints in excavators and cranes use large-bore GE..ES bearings for their high load capacity and self-aligning function.

Industrial Linkages

Connecting rod big-end bearings, eccentric drive mechanisms, and oscillating conveyor pivot points in general industry use GE..ES bearings for alignment compensation.

Automotive Steering

Steering column universal joints and rack end joints in heavy commercial vehicles use GE..ES bearings for their combination of misalignment accommodation and high static load capacity.

Textile Machinery

Weaving loom beater mechanisms and rapier guide arms use medium-bore GE..ES 2RS sealed bearings for contamination resistance in the lint-rich environment.

🔎 Housing Bore Tolerance

H7 for normal loads; K7 or M7 for heavy loads. Press the outer ring into the housing using a press tool on the outer ring end face — never press through the inner ring.

🔧 Shaft Tolerance

h6 for press fit; js6 for tight sliding fit; f7 for free sliding fit. Apply a thin film of assembly lubricant to the shaft before installation.

📈 Initial Lubrication

Apply NLGI-2 EP grease through the oil hole or fitting before commissioning. Fill the cavity between seals (2RS) approximately 30–40% with grease — do not overfill.

⚙ Re-lubrication

Re-lubricate every 200–500 hours depending on load and contamination level. Purge until fresh grease appears at the seal face or fitting exit point.

🌡 Temperature Limit

Standard grease and NBR seals: −30°C to +110°C continuous. For higher temperatures, specify FKM seals and synthetic EP grease rated to the operating temperature.

🔒 Misalignment Limit

Do not exceed the α angle in the specification table. Sustained operation beyond the rated angle causes edge loading and premature wear at the spherical contact edges.

①

Identify Load Type

Confirm whether the application is oscillating (spherical plain bearing) or continuously rotating (use a rolling-element bearing instead). Spherical plain bearings are suited for oscillation up to ±45° at low frequency.

②

Select Bore & Series

Match bore d to shaft nominal diameter. Select ES suffix for grease-lubricated applications; 2RS for contaminated or wet environments.

③

Verify Misalignment Angle

Verify maximum misalignment angle against rated α in the table. Calculate equivalent radial load including any axial component. Check dynamic load rating C ≥ P × (L/10⁶)^(3/10).

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.