CAT 587-9134 250mm Outer Diameter Special Ball Bearing

CAT 587-9134 is a Caterpillar genuine double-row self-aligning ball bearing (with seals and lubrication grooves), 250mm outer diameter, suitable for transmission/steering components of heavy-duty construction machinery. The following is structured raw data, excluding replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 587-9134, type is double row self-aligning ball bearing (ISO 1206), material is high carbon chromium bearing steel (GCr15), quenched + tempered, hardness HRC 60-64, surface phosphated, single weight 8.2 kg, working temperature -40℃ to +120℃, suitable shaft diameter φ120 mm, radial load ≤85 kN, bidirectional axial load ≤18 kN, suitable speed ≤2800 r/min
Operating Conditions

Key Dimensions Inner diameter 120.0 mm (4.724 in), outer diameter 250.0 mm (9.843 in), width 60.0 mm (2.362 in), chamfer size 2×30°, sealing lip inner diameter 122.0 mm, lubrication groove diameter 200.0 mm, number of oil holes 4 (evenly distributed), inner diameter tolerance + 0.018/-0.008 mm, outer diameter tolerance + 0.025/-0.010 mm, width tolerance ±0.12 mm, radial clearance C3 (0.035-0.065 mm)

Compatible Models and Parts: Compatible with the steering knuckle of Cat 777/785 mining dump trucks; the gearbox output shaft of the 980H loader; the final drive input shaft of the D8T bulldozer. Installed between the bearing housing and the shaft, one piece per location, absorbing angular deviation between the shaft and housing (≤2°), compensating for installation errors.

Performance Parameters: Rated dynamic load Cr=102 kN, rated static load Cor=58 kN, limiting speed (grease lubrication) 2800 r/min, (oil lubrication) 3600 r/min, fatigue life ≥8000 hours, sealing protection level IP54, lubrication method: grease lubrication (Cat Moly recommended) Grease)

Structural and Performance Advantages

Double-row self-aligning design: Compensates for angular deviations between the shaft and bearing housing (≤2°), adapting to installation errors and deformation under heavy-duty conditions, preventing bearing seizure.

Integrated sealing system: Double-sided contact rubber seals prevent dust and moisture intrusion, reduce grease leakage, and extend maintenance intervals.

Lubrication groove + oil hole structure: An outer ring annular lubrication groove and four evenly distributed oil holes facilitate grease replenishment, suitable for long-term continuous operation.

High-precision manufacturing: Strict dimensional tolerances, rotational accuracy up to P6 level, reducing vibration and noise, suitable for harsh working conditions in engineering machinery.

Installation and Maintenance Points (Original Data)

Installation process: Clean the journal and bearing housing. Install the bearing using the heat-fit method (heating temperature 80-100℃), ensuring the bearing end face fits snugly against the shaft shoulder, with radial runout ≤0.05 mm. Tighten the bearing housing bolts to the specified torque (120-150 N・m). Maintenance cycle: Check bearing temperature (≤80℃) and vibration value (≤2.5 mm/s) every 2500 hours, replenish grease (50-80 g each time), and replace the bearing when the radial clearance exceeds 0.12 mm.

Common troubleshooting: Overheating of the bearing is mostly due to insufficient lubrication or too small clearance, requiring replenishment of grease or adjustment of the clearance; abnormal noise is mostly due to raceway damage, requiring replacement of the bearing; seal failure requires replacement of the seal and cleaning of the bearing interior.