CAT 583-6659 Self-Aligning Spherical Plain Bearing

CAT 583-6659 is a Caterpillar double-row self-aligning spherical roller bearing, suitable for Cat 320D2/336D2 excavator slewing bearings, 966M loader drive axles, C13 engine camshaft ends, and 140M2 grader rear axle differentials. It can compensate for shaft angular misalignment (≤2.5°), withstand heavy radial loads and bidirectional light axial loads, and is suitable for medium and low speed, vibration, and alignment error conditions, ensuring stable operation of the transmission system. The following is structured technical and application information:

Core Technical Parameters
Item Details
Basic Attributes
Model 583-6659, Double-row self-aligning spherical roller bearing, suitable for Cat 320D2/336D2 excavator slewing bearings, 966M loader drive axles, C13 engine camshaft ends, 140M2 grader rear axle differential, material is chromium-molybdenum alloy steel (inner and outer rings + rollers), cage is stamped steel plate (galvanized surface), operating temperature -40℃ to +120℃, single weight approximately 1.85 kg, used to compensate for shaft angular misalignment, bear radial loads and bidirectional light axial loads, suitable for medium and low speed, vibration and alignment error conditions, prevent shaft wear and jamming, and ensure stable operation of the transmission system.

Key Dimensions
Inner diameter 76.20 mm (3 inches, tolerance 0/-0.015 mm), outer diameter 152.40 mm (6 inches), total width 44.45 mm 1.75-inch diameter roller diameter 19.05 mm, cage pitch circle diameter 114.30 mm, outer ring spherical radius of curvature 76.20 mm, allowable self-aligning angle ≤2.5°, radial clearance C3 (0.10-0.15 mm), mating tolerances inner ring h7 (0/-0.015 mm), outer ring H8 (+0.039/0 mm)
Compatible models: Cat 320D2/336D2 excavators (slewing bearing, boom cylinder pin), 966M loader (drive axle, gearbox output shaft), C13 engine (camshaft end, balance shaft), 140M2 grader (rear axle differential, steering knuckle), 950M loader (boom cylinder, drive axle)
Assembly fit: Compatible with 76.2 mm diameter shaft (tolerance h7, 0/-0.015 mm), bearing housing bore diameter 152.4 mm. mm (tolerance H8, +0.039/0 mm), inner ring interference fit with shaft (interference 0.01-0.02 mm), outer ring clearance fit with bearing housing (clearance 0.01-0.02 mm), journal fillet radius ≤2.0 mm, coaxiality ≤0.05 mm. Installation and Maintenance Points: Before installation, clean the bearing inner and outer rings, journal, and bearing housing bore. Check for scratches, rust, and cracks. Measure the dimensions of the journal and bearing housing bore to ensure the fit meets requirements. The journal fillet radius should be ≤2.0 mm to avoid stress concentration.

Use the heating installation method (oil temperature 80-90℃, do not exceed 100℃). After the bearing inner ring expands, smoothly slide it onto the journal. After natural cooling, check the tightness of the fit. Use a pressure block to smoothly press the outer ring into the bearing housing. Do not directly strike the outer ring to prevent damage to the rollers and raceways.

Lubrication and maintenance: Grease lubrication should fill 30-50% of the bearing’s internal space (Cat Moly Grease is recommended). For oil lubrication, ensure a stable oil level. Check the bearing temperature, vibration, and clearance every 1000 hours. Replace the bearing immediately if the temperature exceeds ambient temperature +40℃, the vibration is abnormal, or the radial clearance exceeds 0.2 mm.