CAT 439-7584 BEARING

CAT 439-7584 is a Caterpillar genuine double-row tapered roller bearing, suitable for heavy-duty components such as drive axles, differentials, and final drives that need to withstand both radial and bidirectional axial loads simultaneously. It provides stable support and precise positioning. The following is the information for this genuine part:

Core Technical Parameters
Item Details
Part Model: CAT 439-7584 (4397584) double-row tapered roller bearing, weighing approximately 2.8 kg (6.17 lb), composed of an inner ring, outer ring, tapered rollers, and a machined brass cage. It can withstand both radial and bidirectional axial loads simultaneously.

Core Materials: Inner ring/outer ring (high carbon chromium bearing steel, integrally hardened HRC 60-64); Rollers (high carbon chromium bearing steel, hardness HRC 62-66); Cage (HPb59-1 brass, integrally machined, high strength, good thermal conductivity)

Key Dimensions: Inner ring inner diameter 85 mm, outer ring outer diameter 150 mm, total bearing width 54 mm, roller large end diameter 16 mm, roller small end diameter 10 mm, inner/outer ring thickness 25 mm, fitting fillet radius 2 mm

Rated parameters: Rated radial dynamic load 145 kN, rated radial static load 220 kN, rated axial dynamic load 65 kN, rated axial static load 180 kN, limiting speed (grease lubrication) 2200 rpm, (oil lubrication) 3000 rpm, suitable temperature -40℃ to +120℃

Suitable operating conditions: Drive axle main reducer, differential half-shaft support, final drive planetary carrier, gearbox secondary shaft, etc., radial and bidirectional axial compound heavy load, medium and low speed conditions, with self-aligning capability, adaptable to shaft and bearing housing installation deviations

Suitable machine models: CAT 336D/349D excavator (drive axle main reducer), 980H/988H Loader (differential half-shaft), 16M grader (final drive planetary carrier), C18 engine (auxiliary drive shaft)

Supporting Parts: Adaptor bearing locknut 6V-7853, adjusting shim 8T-4127, sealing ring 1U-8878, grease nozzle 5P-7562

Core Functions and Structural Features:

Combined Load Bearing: Double-row tapered rollers make line contact with both inner and outer rings, simultaneously bearing radial and bidirectional axial heavy loads, adapting to multi-directional load requirements under complex working conditions, ensuring stable operation of the transmission system.

Self-aligning: The double-row symmetrical design compensates for installation angle deviations between the shaft and bearing housing (≤2°), reducing contact stress between the rollers and raceway edges, reducing wear, and extending service life.

High-precision positioning: Precise interference fit between the inner ring and shaft, and between the outer ring and bearing housing, controls radial and axial clearances, reduces vibration and noise, improves equipment operating accuracy, and adapts to stable transmission under heavy loads.

Excellent heat dissipation: The brass cage has good thermal conductivity, which can quickly dissipate the heat generated by the bearing operation, making it suitable for high-temperature conditions and reducing the risk of lubrication failure due to excessive temperature.