CAT 207-2311 Bearing-Spherical Roller

CAT 207-2311 is a Caterpillar original double-row self-aligning roller bearing, commonly used in the transmission systems of equipment such as wheel loaders and excavators (e.g., final drives, gearbox output shafts). It can withstand heavy radial loads and bidirectional axial loads, has self-aligning capability, adapts to the installation deviations of the shaft and bearing housing, ensures stable operation of transmission components, and is a core bearing component under heavy-duty conditions. The following are the core information and key points:

Core Technical Parameters
Item Details
Part Model CAT 207-2311 (2072311) Double Row Self-Aligning Roller Bearing, Original Equipment Manufacturer (OEM), No Universal Replacement Model

Material Bearing steel (chromium-molybdenum alloy steel), Outer ring/inner ring/roller hardness HRC 60-64, Cage is stamped steel plate/copper alloy, Corrosion resistance ≥72 hours neutral salt spray test

Key Dimensions Inner diameter 85mm, Outer diameter 150mm, Width 52mm, Chamfer r=2.5mm, Radial clearance C3 group (0.035-0.055mm), Applicable shaft diameter tolerance js6, Bearing housing tolerance H7

Applicable Models CAT 950G/962G loaders, 320C/325C excavators, etc., used in heavy-duty transmission parts such as final drives, gearbox output shafts, and differentials

Performance Parameters Dynamic Rated Load 290kN, static rated load 480kN, limiting speed 2800r/min (grease lubrication)/3600r/min (oil lubrication), operating temperature -40℃ to 120℃ Core Functions and Structure:

Heavy Load Bearing: Double-row symmetrical roller design, capable of withstanding large radial loads and bidirectional axial loads, suitable for frequent start-stop and heavy-duty operation conditions in engineering machinery, preventing bearing overload damage.

Self-aligning capability: The outer ring raceway is spherical, allowing an angular deviation of ≤2° between the shaft and bearing housing, compensating for installation errors and shaft deflection, reducing edge contact between the rollers and raceways, and reducing wear.

Stable Transmission: High-precision roller and raceway fit ensures the coaxiality and rotational accuracy of transmission components, reduces vibration and noise, and extends the service life of gears, shafts, and other components.

Lubrication and Sealing: Suitable for grease or oil lubrication; some models have contact seals, IP54 protection rating, preventing dust and moisture intrusion and maintaining grease cleanliness.

Installation and Maintenance Points

Installation Specifications: Clean the journal and bearing housing bore to remove oil and rust. Journal roughness Ra ≤ 0.8μm, roundness ≤ 0.01mm. Use hot mounting (bearing heated to 80-100℃) or cold mounting (shaft cooled to -20℃). Do not directly strike the bearing inner or outer rings.

After installation, check the radial clearance to ensure it is within group C3. Ensure the bearing end face and shaft shoulder fit tightly without gaps. Tighten the bearing housing bolts to the torque specified in the equipment manual (usually 80-100 N·m).

Maintenance Recommendations: Every 1000 working hours, check: bearing temperature (≤80℃), vibration value (≤5mm/s), and grease condition. If abnormal, replenish or replace the grease immediately. Replace the grease every 2000-3000 working hours (grease lubrication). Genuine 207-2311 bearings must be used; ordinary self-aligning roller bearings cannot be substituted to avoid insufficient load capacity and poor self-aligning performance leading to premature bearing failure and transmission component malfunctions.