Bronze Liner

Tin-bronze bushing pressed into the outer ring's spherical bore. Steel-on-bronze sliding contact provides wear resistance and shock tolerance.

Self-Aligning

Spherical contact accommodates angular misalignment between shaft and housing — essential for pivot joints where alignment cannot be guaranteed.

Lubrication Grooves

Groove and oil holes in the outer ring distribute grease across the full bronze-steel contact surface during re-lubrication.

Shock Load Tolerance

Bronze liner absorbs shock loads better than pure steel-steel contact, making PB suitable for impact-heavy applications such as construction equipment and agricultural machinery.

Self-Lining Capability

Bronze liner has natural self-lubricating properties that reduce friction during the brief periods between re-lubrication cycles.

13 Bore Sizes

5 mm to 30 mm for light to medium industrial pivot and linkage applications.

Tin-Bronze Liner (CuSn8)

Pressed into outer ring spherical bore. Self-lubricating properties. Compatible with mineral and synthetic EP greases.

100Cr6 Inner Ring

Hardened to HRC 58–64. Spherical OD ground to Ra 0.4–0.8 µm as the running surface against bronze liner.

Steel/Bronze Contact Pair

Wear-resistant, shock-tolerant sliding contact. Lower friction than steel-on-steel at low speeds and high loads.

Hydraulic Cylinder Clevis

Clevis pin joints at hydraulic cylinder rod and barrel ends require the self-aligning and shock-absorbing properties of bronze-lined spherical plain bearings.

Agricultural Equipment

Linkage pivot pins in ploughs, rippers, and baler mechanisms are classic applications — slow speed, heavy static and shock loads, and dirty conditions.

Construction Machinery

Boom hinge pivot joints, bucket connection pins, and outrigger pad joints in mobile construction equipment use PB bearings for their shock resistance.

Industrial Hinges

Heavy industrial door hinges, valve pivot points, and slow-moving mechanism pin joints use PB bearings for low friction and self-alignment without complex housings.

Mining Equipment

Chute gate pivot joints, vibrating screen support pins, and crusher toggle plate bearings use PB series for shock tolerance in abrasive environments.

Marine Equipment

Tiller bearing joints, hatch hinge pins, and steering mechanism pivots in marine equipment use bronze-lined bearings for their corrosion compatibility and self-aligning function.

🔎 Housing Bore

H7 tolerance. Press outer ring into housing using press tool on the outer ring end face. Apply thread-locking compound if the housing is aluminium and operating temperature varies.

🔧 Shaft Tolerance

h6 for press fit; f7 for sliding fit. The inner ring bore is the pivot pin bore — verify pin diameter against specification table.

📈 Initial Lubrication

Apply NLGI-2 EP grease through the oil hole or grease fitting at installation. Purge until grease appears at both ends of the bearing face.

⚙ Re-lubrication Interval

Every 200 hours under continuous use; more frequently in water-exposed or heavily contaminated environments. Use water-resistant EP2 grease in wet conditions.

🌡 Speed Limit

PB bearings are rated for slow oscillating motion and very slow continuous rotation. Maximum surface velocity at the bronze-steel contact: 0.05 m/s. Above this, heat buildup damages the bronze liner.

🔒 Contamination Management

PB bearings tolerate moderate contamination better than ball bearings, but abrasive ingress accelerates bronze liner wear. Add external wiper seals or boots in heavily contaminated environments.

①

Identify Load Type

Confirm slow oscillating or pivoting motion with heavy or shock loads. PB is not for continuous rotation or high speed.

②

Select Bore & Series

Match bore d to pivot pin nominal diameter. Verify outer diameter D fits housing bore. Check B dimension against housing depth.

③

Verify Misalignment Angle

Verify dynamic load rating C ≥ equivalent load. Confirm surface velocity at contact ≤ 0.05 m/s. Check misalignment angle ≤ rated α.

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.