CAT 439-7630 BEARING

CAT 439-7630 (4397630) is a Caterpillar original single-row tapered roller bearing (outer ring/bearing cup), suitable for loader/excavator drive axle differentials and gearbox secondary shafts. The following is purely accurate information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 439-7630 Single-row tapered roller bearing (outer ring/bearing cup)

Part Type: Tapered roller bearing outer ring, paired with the inner ring + roller assembly, withstands radial + unidirectional axial loads, suitable for drive axle differential housings and gearbox secondary shaft support positions, outer ring with mounting positioning grooves

Material: High carbon chromium bearing steel GCr15, quenching hardness HRC60-64, raceway ultra-precision ground (Ra≤0.05μm), contact fatigue strength ≥1550MPa, surface rust prevention treatment (salt spray test ≥96h)

Key Dimensions: Inner Diameter 104.775mm (4.1250in), outer diameter 152.40mm (6.0000in), width 29.37mm (1.1563in), cone angle 10°, locating groove width 5.0mm, depth 1.5mm, chamfer 1.5×45°, fit tolerance H7

Structural Features: Single-row tapered raceway, line contact bearing, suitable for oil lubrication, limiting speed 3800rpm, rated dynamic load 98.0kN, rated static load 122.0kN, clearance class C2

Compatible Structures: Drive axle differential bearing assembly, gearbox two-shaft support bearing assembly, compatible with 439-7629 inner ring, 439-7631 roller cage, and 439-7632 seal ring

Applicable Working Conditions: Construction machinery drive axle / Transmission low-to-medium speed (≤3200rpm), medium-to-heavy load (≤100kN) shaft system, suitable for impact loads and direction-changing conditions, oil temperature -30℃ to 120℃. Compatible Models and Assemblies: Loaders: CAT 950M, 962M, 972M (950M transmission second axle support bearing assembly, 962M drive axle differential side bearing assembly) Excavators: CAT 320GC, 323, 326 (320GC drive axle differential bearing assembly, 323 transmission output shaft bearing assembly) Graders: CAT 140M, 160M (140M drive axle differential bearing assembly) Compatible Assemblies: 950M transmission second axle support bearing assembly, 320GC drive axle differential bearing assembly Installation and Fitting Points: Outer ring and bearing housing bore interference fit (interference amount) (0.012-0.022mm) Use a special press for symmetrical cold pressing installation. Do not strike the outer ring end face/raceway to prevent deformation and loss of precision.

Before installation, clean the seat hole/raceway, ensuring it is free of burrs, metal filings, and oil stains. Check the outer ring for cracks, the raceway for pitting/peeling, the locating groove for integrity, and the end face flatness ≤0.015mm.

After assembly with the inner ring, the axial clearance should be 0.05-0.10mm, with no jamming or abnormal noise during operation. The oil lubrication pressure should be 0.12-0.25MPa, and the flow rate ≥1.8L/min.

For disassembly, use a puller to remove the ring. Do not pry the raceway. Before reuse, check the raceway wear (replace if >0.10mm). The seat hole roundness should be ≤0.01mm.