CAT 140-2886 Double Row Spherical Roller Bearing

The CAT 140-2886 is a Caterpillar genuine double-row spherical roller bearing (type 22209E/W33, cylindrical bore, with intermediate guide ring, self-aligning). It is suitable for heavy-duty transmission components such as the Cat 140M grader rear axle, 950GC loader boom reduction gearbox, and 320D excavator slewing bearing. It can withstand heavy radial loads and bidirectional axial loads, and has a self-aligning angle of ±2°, making it suitable for scenarios with large operating vibrations and angular misalignment between the shaft and the bearing housing. The following is its complete technical and application information:
Core Technical Parameters
Item Details
Basic Attributes
Model 140-2886, type is double row spherical roller bearing (cylindrical bore, no seal, stamped steel cage, brass intermediate guide ring), suitable for Cat 140M grader rear axle differential, 950GC loader boom reduction gearbox, 320D excavator slewing bearing, C15 engine fan clutch shaft, material is inner/outer ring (52100 bearing steel, hardened HRC 60-64), rolling elements (chrome steel, HRC 62-66), cage (SAE 1010 stamped steel, galvanized and passivated), rated dynamic load 140 kN, rated static load 152 kN, limiting speed 3600 rpm (grease lubrication)/4500 rpm (oil lubrication), operating temperature -40℃ to +120℃, self-aligning angle ±2°, radial clearance C3 Grade (0.025-0.045 mm), single weight approximately 1.36 kg (3 lb)

Key Dimensions: Inner diameter 45 mm (tolerance P6, +0.012/0 mm), outer diameter 100 mm (tolerance P6, 0/-0.015 mm), width 36 mm (tolerance ±0.15 mm), chamfer r1/r2=2.0 mm, rolling element diameter 10.5 mm, cage center distance 20 mm, outer ring raceway radius of curvature 26 mm, inner ring raceway radius of curvature 22 mm

Material and Manufacturing Process: Inner/outer rings are quenched + tempered + precision ground, surface roughness Ra≤0.4 μm; rolling elements are hardened chromium steel; cage is stamped + galvanized passivation (salt spray resistance ≥72 hours); intermediate guide ring ensures synchronous operation of the double-row rollers and prevents jamming.

Compatible Model: Cat 140M This product is suitable for: grader rear axle differential, 950GC loader boom reduction gearbox, 320D excavator slewing bearing, C15 engine fan clutch shaft, and 140M grader steering drive axle. Suitable operating conditions include: heavy loads, high vibration, and transmission systems with angular deviations between shafts and bearing housings, such as reduction gearbox input/output shafts and rear axle differential shafts.

Assembly Fit: Compatible with 45 mm diameter shafts (tolerance m6, +0.015/+0.002 mm), and 100 mm diameter bearing housing bores (tolerance H7, +0.035/0 mm). Axial positioning is achieved via the shaft shoulder and bearing cap. Preload should be adjusted according to the equipment manual. Recommended grease lubrication is Cat DEO-ULS No. 2 lithium-based grease, filled to 1/3-1/2 of the bearing’s internal space.
Installation and Maintenance: Before installation, clean the shaft and bearing housing bore. Check the bearing inner and outer rings and rolling elements for cracks/rust, ensure the cage is not deformed, and maintain the surface roughness Ra of the shaft and bore ≤ 0.8. μm, free of scratches/dents.

Hot-fit inner ring: Heat the bearing inner ring in an 80-100℃ constant temperature oil bath for 5-10 minutes, then quickly install it onto the shaft, using the shaft shoulder for positioning. Cold-fit outer ring: Cool the outer ring in an environment of -20 to -30℃ for 30 minutes, then install it into the bearing housing bore, ensuring the outer ring end face fits snugly against the housing step.

Maintenance recommendations: Check the bearing operating temperature (≤80℃) and vibration value (≤2.5 mm/s) every 1000 hours. For grease lubrication, replenish grease every 2000 hours. Replace the bearing immediately if abnormal noise, abnormal temperature rise, or clearance exceeds 0.1 mm.