CAT 383-0468 Crankshaft Main Bearing

CAT 383-0468 is a Caterpillar genuine single-row cylindrical roller bearing, suitable for medium-speed, heavy-duty rotating parts in engineering machinery gearboxes, drive axles, or hydraulic motors, used for radial load support and positioning. The following is pure original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 383-0468, Type: Single-row cylindrical roller bearing (with cage, inner ring with flange), Suitable for gearbox shaft 2, drive axle differential, hydraulic motor output shaft, Single weight 1.8 kg, Operating temperature -40℃ to +120℃, Suitable for anti-wear hydraulic oil and extreme pressure lithium-based grease, Used for radial support under medium-speed heavy-load conditions, improving the rigidity and efficiency of the transmission system

Key Dimensions (Metric / Imperial)
Inner diameter 100.0 mm (tolerance 0/-0.025 mm), Outer diameter 150.0 mm (tolerance +0.030/+0.010 mm), Width 35.0 mm (tolerance ±0.10 mm), Roller diameter 12.0 mm, Number of rollers 16, Inner ring flange height 5.0 mm, Outer ring without flange, Chamfered ends 2×45°, Suitable shaft diameter φ100 mm (tolerance f6), mounting hole diameter φ150 mm (tolerance H7)

Performance Parameters: Inner/Outer Ring Material: Chromium bearing steel (GCr15), hardness HRC 60-64; Cage Material: Phenolic resin, tensile strength ≥120 MPa; Radial clearance 0.03-0.06 mm, coefficient of friction ≤0.002, dynamic rated load ≥140 kN, static rated load ≥160 kN, suitable speed ≤3000 rpm, wear life ≥8000 hours, surface roughness Ra≤0.8 μm, coaxiality ≤0.03 mm

Structure and Fitting Characteristics: High rigidity design: Single-row cylindrical rollers are evenly distributed, with a cage structure to prevent rollers from rubbing against each other. The inner ring has a flange for axial positioning, suitable for medium-speed heavy-load rotating parts such as gearboxes and drive axles, providing stable radial support and absorbing transmission impact loads.

Precise Installation and Positioning: The inner ring with a flange allows for axial positioning by fitting snugly against the shaft shoulder, while the outer ring without a flange facilitates installation and adjustment. It is suitable for compact transmission systems and, after installation, precisely mates with the shaft and bearing housing to ensure coaxiality.

Medium-Speed ​​and Heavy-Duty Adaptability: The rollers make contact with the raceway line, providing strong load-bearing capacity. It can withstand continuous radial loads under conditions such as gearbox shifting and drive axle differential speed. It is suitable for the transmission systems and hydraulic motor components of Cat 320D2, 336D2, and 966M models.

Installation and Maintenance Points (Original Data)

Installation: Clean the bearing, shaft, and bearing housing (free of oil and metal shavings). Heat the inner ring (temperature ≤100℃) before hot-fitting it onto the shaft, or cold-press the outer ring into the bearing housing with a pressing force ≤200 kN. Ensure the inner ring end face fits snugly against the shaft shoulder. The clearance between the outer ring and the bearing housing bore should be 0.01-0.03 mm, with a coaxiality ≤0.04 mm.

Maintenance: Check the wear and clearance of the bearing rollers every 2000 hours. Replace immediately if the roller wear is ≥0.2 mm or the cage is damaged. Regularly replenish the grease. The lubrication cycle should be synchronized with the main drive system. Apply anti-rust oil and seal when storing for a long time.