CAT 626-0485 55mm Inner Diameter Boom Cylinder Bearing

CAT 626-0485 (6260485) is a Caterpillar original equipment manufacturer (OEM) boom cylinder bearing, suitable for the articulation of the boom/stick cylinder in excavators. The following is purely precise information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 626-0485 Boom Cylinder Bearing

Part Type: Radial spherical plain bearing, used at the articulation between the boom cylinder and the boom/frame, bearing radial + bidirectional axial combined loads, suitable for swing motion.

Material: Outer ring: Carbon steel, hardened; Inner ring: Carbon steel, tempered; Liner: Self-lubricating material to reduce friction and wear (Cat®…)

Key Dimensions: Inner diameter 55.00 mm, Outer diameter 80.00 mm, Width 30.00 mm, Spherical radius 27.50 mm, Clearance 0.08-0.12 mm

Structural Features Outer ring spherical, inner ring cylindrical bore, with dustproof seal, adaptable to ±12° swing angle, enabling smooth rotation and swing.

Suitable Structures: Boom cylinder upper/lower hinge point, stick cylinder hinge area, loader boom and frame hinge point.

Applicable Working Conditions: Suitable for construction machinery articulation scenarios with temperatures ranging from -30℃ to 140℃, medium to heavy loads (radial load ≤90 kN), and low swing frequency (≤12 times/minute).

Compatible Models:
CAT 416E Backhoe Loader (Boom Cylinder Hinge Bearing) Cat®…
CAT 420F2/430F2 Wheel Excavator (Boom Cylinder Lower Hinge Point Bearing)
CAT 305.5E2/306E2 Mini Excavator (Stick Cylinder Upper Hinge Point Bearing)
CAT 906M/907M Mini Loader (Boom Cylinder Hinge Bearing)

Installation and Fitting Points: Mounting Hole Diameter 80.00-80.10 mm, hinge shaft diameter 54.95-55.00 mm, bearing and bore/shaft are transition fit, no looseness.

Use a hydraulic press to smoothly press into the mounting hole; do not hammer, to prevent bearing deformation and liner damage.

Before installation, clean the mounting hole and hinge shaft, removing burrs and oil stains. Check the bearing seal ring is intact and the liner is undamaged.

After installation, the bearing end face should be flush with the mounting surface, axial movement ≤0.05 mm, no jamming during oscillation, and no leakage from the seal.

No additional lubrication is required; it operates relying on the self-lubricating liner. Check the seal every 2000 hours to prevent dust ingress.