CAT 2L-7246 BEARING

CAT 2L-7246 is a single-row tapered roller bearing (matching outer ring 2L-7248, inner ring assembly 2L-7247), commonly used in the wheel ends, differentials, and final drives of Caterpillar mini excavators and loaders. It is suitable for combined radial and unidirectional axial loads. The following are the core information:

Core Technical Parameters
Item Details
Part Model: CAT 2L-7246 (2L7246) Single-row tapered roller bearing (including inner ring, rollers, cage, matching outer ring 2L-7248, compatible with NLGI 2 lithium-based grease)

Core Material: GCr15 bearing steel, integrally hardened, inner ring hardness HRC 60–64, outer ring HRC 58–62, raceway Ra≤0.4 μm, contact accuracy IT5 grade

Key Dimensions: Inner diameter 38.1 mm, outer diameter 80 mm, width 29.37 mm, cone angle 10°, unit weight approximately… 0.62 kg (1.37 lb)

Rated Load: Dynamic rated load 82 kN, static rated load 105 kN, limiting speed 4200 rpm (grease lubrication), operating temperature -30℃ to +120℃

Compatible Models: CAT 305.5E2/306E2 excavators (final drive), 906M loaders (drive axle wheel end), 226D3 skid steer loaders (differential)

Suitable Operating Conditions: Low to medium speed rotation, continuous operation, capable of withstanding radial and unidirectional axial loads, suitable for light impact and vibration

Core Functions and Structural Features:

Separable Design: The inner ring is separable for easy installation, disassembly, and maintenance. The raceway tapered surface ensures uniform contact with the rollers, resulting in high rotational accuracy and smooth operation.

High Load Capacity: Optimized matching of hardened raceways and rollers, suitable for combined loads in small equipment transmission systems. Standard operating life can reach over 5000 hours.

Flexible Installation: The inner ring has an interference fit with the shaft (interference 0.01–0.02 mm), and the outer ring has a clearance fit with the housing bore. Radial runout after installation is ≤0.02 mm.

Installation and Maintenance Points

Installation Specifications: Clean the inner ring, outer ring, and journal/housing bore. Heat-fit the inner ring (80–100℃), and cold-fit the outer ring. Control the pressing force at 12–18 kN. Do not strike the end face.

Journal tolerance: +0.005–+0.015 mm; Housing bore tolerance: +0.01–+0.025 mm. After installation, adjust the axial clearance to 0.05–0.1 mm.

After assembly, apply NLGI 2 lithium-based grease to ensure adequate lubrication.

Maintenance Recommendations: Check the operating status every 800 working hours, observing for abnormal noises, temperature rise, and sealing conditions.

When pitting, spalling, or wear exceeding 0.1 mm occurs on the raceway, the inner ring, outer ring, and roller assembly must be replaced simultaneously to ensure the overall performance of the bearing.