Description
CAT 533-6400 SLEEVE-SEM
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CAT 533-6400 SEM is a Caterpillar genuine heavy-duty axle wear-resistant sleeve (bushlet type), suitable for loader/excavator pin joints. The following is purely accurate information (without additional description):
Core Parameters and Information
Item Details
Part Model: CAT 533-6400 (5336400) SEM Axle Wear-Resistant Sleeve
Part Type: Heavy-duty bushing, used for radial support of pins, bearing radial loads and reducing friction and wear
Material: 42CrMo alloy steel, tempered + surface hardened, hardness HRC58-62, inner hole surface grinding Ra≤0.4μm
Key Dimensions: Inner diameter 75.00mm (H7 tolerance), outer diameter 95.00mm (r6 tolerance), length 120.00mm, wall thickness 10.00mm
Structural Features Oil-free groove (for grease lubrication), chamfered ends (3×45°), inner hole cylindricity ≤0.01mm
Matching: Clear fit with pin (0.015-0.025mm), interference fit with mounting hole (0.010-0.020mm), operating temperature -40℃ to +120℃
Lubrication Requirements: Grease lubrication (CAT MOLY-D No. 2 lithium-based grease), lubrication cycle 500 working hours
Compatible Machines and Assemblies:
Loaders: CAT 950M, 962M (boom and rocker arm connecting pins)
Excavators: CAT 330GC, 336GC (stick and bucket connecting pins)
Compatible Assemblies: Boom pin seat, stick pin seat, connecting rod pin seat
Matching Parts: 533-6400 sleeve, 8T-4125 elastic retaining ring, pins (e.g.) 533-6401), Dustproof Ring (431-5968)
Installation and Fitting Points:
Clean the mounting hole and sleeve surface, ensuring no burrs or oil stains. The mounting hole roughness Ra≤1.6μm, and the sleeve outer diameter should be free of scratches.
Cold press installation, pressure ≤30kN. Use guide fixtures to ensure coaxiality. Do not directly strike the sleeve end face.
Interference fit with the mounting hole: 0.010-0.020mm. Rear end face runout ≤0.03mm, radial runout ≤0.02mm.
After installation, apply grease to ensure the inner hole is filled with grease. The pin should rotate smoothly without jamming after installation, with a clearance of 0.015-0.025mm.
