CAT 587-9137 280mm Outer Diameter Special Ball Bearing

The CAT 587-9137 is a Caterpillar-customized double-row angular contact ball bearing with an outer diameter of 280 mm. It is suitable for heavy-duty applications and conditions requiring bidirectional axial positioning, and is commonly used in the swing drive and travel reducers of large excavators and loaders. It can simultaneously withstand radial and bidirectional axial loads, and features high rigidity and precise clearance control. The following is information on its structured technology and applications.

Core Technical Parameters

Item Details
Basic Attributes Model 587-9137, type is double row angular contact ball bearing, cage is stamped steel cage, material is high carbon chromium bearing steel (100Cr6), inner ring/outer ring hardened (hardness 60-64 HRC), single weight approximately 18.5 kg, operating temperature -40℃ to +120℃, lubrication method is grease lubrication (NLGI grade 2 lithium-based grease), sealing type is non-contact labyrinth seal, fit tolerance: inner diameter H7, outer diameter r6

Key Dimensions Inner diameter 150 mm, outer diameter 280 mm, total width 86 mm, chamfer 3×45°, rolling element diameter 32 mm, cage center circle diameter 215 mm, radial clearance 0.15-0.22 mm, contact angle 30°, surface roughness Ra≤0.4 μm

Compatible Models and Parts Compatible with Cat 374F/390F For excavators, 982M/986M loaders, and D11T bulldozers, this product is installed on the slewing bearing drive shaft, travel reducer output shaft, and main pump drive end, etc., one piece per location. It is compatible with shaft diameters of 150 mm and has a rated load ≤350 kN.

Performance Parameters: Radial rated static load ≥1560 kN, radial rated dynamic load ≥1080 kN, axial rated static load ≥950 kN, axial rated dynamic load ≥680 kN, limiting speed 2200 rpm (grease lubrication), permissible angular deviation ≤0.2°, coefficient of friction ≤0.0015 (grease lubrication), rated life ≥15000 hours.

Structural and Performance Advantages: Double-row angular contact design: 30° contact angle, capable of simultaneously withstanding large radial loads and bidirectional axial loads, suitable for combined stress conditions such as slewing and traveling, improving shaft positioning accuracy.

Stamped steel cage: High strength and lightweight, suitable for higher speeds, reducing rolling element friction and heat generation, lowering operating noise, and improving bearing stability.

Labyrinth seal: Non-contact design reduces friction loss while effectively blocking dust, mud, and other foreign matter, suitable for dusty and humid operating environments in construction machinery, extending lubrication cycles.

Precise clearance control: Radial clearance 0.15-0.22 mm, matching the thermal expansion requirements under heavy load conditions, preventing bearing seizure while ensuring operational accuracy.

Installation and maintenance points:
Installation process: Clean the journal and bearing housing bore, ensuring no oil or rust; install using the heat-fit method (heat the bearing to 80-100℃), pressing it in evenly with a special tool, avoiding hammering; after installation, check the radial clearance and contact angle to ensure they meet requirements; add grease until overflowing, and install the sealing cap.

Maintenance Cycle: Check bearing temperature, vibration, and grease condition every 2000 hours. If the temperature is abnormal (>80℃), stop the machine for inspection. Replenish grease every 4000 hours, shortening to 1500 hours under harsh operating conditions. Regularly check the seal condition and replace any damaged seals promptly.

Common Faults and Solutions: Overheating is often due to insufficient lubrication or too small clearance, requiring grease replenishment or clearance adjustment. Abnormal vibration may indicate rolling element damage or cage deformation, requiring bearing replacement. Seal failure requires seal replacement and inspection of the fit clearance.