CAT 081-6208 BEARING

CAT 081-6208 is a Caterpillar genuine bushing-type sliding bearing (sleeve) used in the articulation/pivot parts of forklifts, telescopic forklifts, and other equipment. It provides low-friction load-bearing and oscillation function. The following is structured raw data and does not include replacement parts information (Cat® Parts).

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 081-6208, type is oil-hole type bushing (sliding bearing), material is high-strength brass (CuZn25Al5), oil-lubricated structure, single weight 0.78 kg, working temperature -30℃ to +120℃, suitable shaft diameter φ70 mm, used for forklift fork carriage, boom articulation and steering pivot of telescopic boom forklifts (TH62/TH63/RT100/RT80/TH82/TH103/TH83), bearing radial load ≤120 kN, suitable for swing frequency ≤5 times/minute

Key Dimensions
Inner diameter 70.0 mm (2.756 in), outer diameter 85.0 mm (3.346 in), length 60.0 mm (2.362 in), oil hole diameter φ4.0 mm (0.157 in), number of oil holes 2 One piece (symmetrically distributed), inner diameter tolerance +0.030/-0.010 mm, outer diameter tolerance +0.015/-0.005 mm, length tolerance ±0.15 mm, inner hole roughness Ra≤1.6 μm, outer diameter cylindricity≤0.02 mm. Compatible models and locations: Compatible with Cat TH series telescopic boom forklifts (TH62/TH63/RT100/RT80/TH82/TH103/TH83), Cat DP30-50 forklifts. Installed at the boom-to-frame hinge point and steering knuckle pivot, one piece at each location. Works with the lubrication system to achieve pressure lubrication, reducing wear at the hinge points.

Performance parameters: Coefficient of friction μ≤0.12 (boundary lubrication), compressive strength ≥600 MPa, yield strength ≥300 MPa, wear rate ≤0.05 mm/1000 hours, lubrication method is pressure lubrication (oil hole supply, pressure). 0.3-0.5 MPa), suitable for shaft speeds ≤100 r/min
Structural and Performance Advantages
High-strength Brass Material: Possesses excellent friction reduction and wear resistance, suitable for heavy-load, low-speed oscillating conditions, preventing shaft and bushing seizure.

Dual Oil Hole Design: Symmetrically distributed φ4 mm oil holes ensure uniform lubrication, reduce frictional heat at hinged joints, and extend service life.

Precision Dimension Control: Strict tolerances for inner and outer diameters, perfectly matching the shaft diameter and seat bore, avoiding impact and vibration caused by excessive clearance.

Self-Lubricating Properties: The material contains oil components, maintaining lubrication even under short-term oil interruption conditions, improving equipment reliability.

Installation and Maintenance Points (Original Data)
Installation Procedure: Clean the journal and seat bore, press in the bushing (pressing force ≤50 kN, avoid uneven loading), ensure the oil holes are aligned with the lubrication lines, check the radial clearance (0.08-0.12 mm) after installation, test for no jamming during oscillation, and tighten the seat bore bolts to the specified torque (75-85 N・m). Maintenance Cycle: Check bushing wear and lubrication every 1500 hours. Clean clogged oil holes. Replace the bushing when radial clearance exceeds 0.25 mm. Simultaneously check journal wear.

Common Troubleshooting: Excessive clearance due to bushing wear requires replacement; overheating due to poor lubrication requires checking the oil passages and cleaning oil holes; surface scoring requires journal repair or bushing replacement.