CAT 538-5932 Straight Sleeve Bearing

CAT 538-5932 is a Caterpillar genuine straight sleeve bearing (with internal lubrication grooves), suitable for connecting rods, rocker arms, or pivots in excavators, loaders, and other construction machinery. It is used for rotational and oscillating support under medium-to-low speed and medium-to-heavy load conditions. The following is pure original data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 538-5932, Type: Straight Metal Sleeve Bearing (with internal lubrication groove), Suitable for connecting rod pivots, rocker arm supports, steering knuckles, etc., Single weight 0.42 kg, Operating temperature -40℃ to +120℃, Suitable for extreme pressure lithium-based grease, Used for radial support in rotational and oscillating conditions, reducing friction and wear, and improving the reliability of connection parts.

Key Dimensions (Metric/Imperial)
Inner diameter 45.0 mm (tolerance H7), Outer diameter 60.0 mm (tolerance g6), Width 54.0 mm (tolerance ±0.12 mm), Chamfer 1.5×45°, Lubrication groove depth 0.8 mm, width 2.0 mm, Suitable shaft diameter 45.0 mm (tolerance h6), Mounting hole diameter 60.0 mm (tolerance H7), Fit clearance 0.015-0.035 mm

Performance Parameters Made of high-carbon steel (surface hardening hardness HRC 58-62, core hardness HRC 28-32), radial load capacity ≥45 kN, suitable speed ≤1500 rpm, wear life ≥8000 hours, coefficient of friction ≤0.08 (with good lubrication), can withstand slight impact loads, suitable for swing angles ≤±30°.

Structure and Compatibility Characteristics

Lubrication Groove Design: Internal lubrication grooves store grease and form an oil film, suitable for connecting rods, rocker arms, etc., without continuous lubrication supply, reducing the risk of dry friction and extending service life.

Medium-Heavy Load Compatibility: Made of high-carbon steel with surface hardening treatment, it has high strength and good wear resistance, suitable for low-to-medium speed, medium-to-heavy load swing/rotation parts such as boom connecting rods, stick pivots, and steering knuckle supports of excavators 320D and 330D, loaders 950H and 966H.

Easy Installation: The straight, flangeless design fits standard mounting holes. Cold pressing assembly is sufficient, eliminating the need for complex positioning structures, resulting in high assembly efficiency and quick replacement and maintenance.

Installation and Maintenance Points (Original Data)

Installation: Clean the bearing and mounting holes (free of oil and metal shavings). Cold press assembly (pressure ≤80 kN), ensuring the bearing end face fits snugly against the mounting groove. Coaxiality ≤0.05 mm. After installation, hand rotation should be smooth without jamming. Radial clearance 0.02-0.03 mm.

Maintenance: Check lubrication and wear every 1000 hours. Regularly replenish with extreme pressure lithium-based grease (approximately 5-8 g every 500 hours). Replace immediately if bearing inner diameter wear ≥0.2 mm or surface pitting or peeling occurs. Prevent loosening of connections or abnormal noise.