Description
CAT 008-3053 KNUCKLE
| CAT 008-3053 KNUCKLE |
| CAT 008-3054 KNUCKLE |
| CAT 008-3178 CONE |
| CAT 008-7843 BUSHING |
| CAT 009-2039 TRUNNION |
| CAT 009-2731 RETAINER A |
| CAT 009-2782 BUSHING |
| CAT 009-3032 BUSHING |
CAT 008-3053 is a Caterpillar genuine single-ear spherical plain bearing (pure original factory information, no additional description):
Core Parameters and Information
Item Details
Part Model: CAT 008-3053 (0083053) Spherical Plain (Single-Ear Spherical Plain Bearing)
Part Type: Radial self-lubricating single-ear spherical plain bearing, used for the hinge point of a swing mechanism to achieve low-friction angular motion and compensate for installation errors.
Material: Outer ring (GCr15 bearing steel, hardened HRC58-62) + Inner ring (42CrMo alloy steel, tempered HB280-320) + Inner bore PTFE fabric gasket
Key Dimensions: Inner diameter 30 mm, outer diameter 55 mm, ear hole diameter 14 mm, total length 42 mm, spherical radius 27.5 mm, gasket thickness 0.8 mm
Structural Features: Integral single-ear fork head, spherical contact in the inner bore, self-lubricating PTFE gasket, adaptable to ±15° Swing angle, oil-free maintenance
Surface treatment: Outer ring blackened + passivated, inner ring hard chrome plated (thickness 0.05-0.08 mm), ear fork surface galvanized
Matching: Inner hole and pin clearance fit (D10/h9), radial clearance 0.04-0.07 mm, ear hole and bolt transition fit (H8/js7)
Rated load: Radial rated dynamic load 22 kN, radial rated static load 48 kN, allowable swing frequency 3 cycles/min
Operating temperature: -40℃ ～ +180℃
Weight: 0.26 kg
Compatible models and assemblies:
Mini excavators: CAT 301.7CR, 302.7CR (boom and stick connection joint, bucket linkage joint)
Skid steer loaders: CAT 242D, 272D (working device linkage hinge point)
Matching parts: 008-3053 joint, pin (008-0465) (Bushing adapter), cotter pin, dust cover
Installation and Maintenance Points
Clean the pin and joint inner hole, removing burrs and oil. The inner hole roughness Ra ≤ 1.6μm, and the pin roughness Ra ≤ 0.8μm.
Use a special tooling to press the pin into the joint inner hole. Do not strike the ear fork. Ensure the pin and inner hole are coaxial and that there is no jamming during swing.
Post-installation inspection: The swing angle conforms to the design value, the radial clearance is within the allowable range, and the ear fork is free from deformation and cracks.
Maintenance: Check the swing flexibility and wear every 1500 working hours. Replace the liner when wear exceeds 0.3 mm or peeling occurs.
