CAT 439-7652 BEARING

CAT 439-7652 is a Caterpillar genuine single-row tapered roller bearing (with cage, including inner/outer ring/roller/cage assembly), suitable for drive axle differentials or transmission output shafts. The following is purely precise information (no additional description) for Cat®…:

Core Parameters and Information

Item Details
Part Model: CAT 439-7652 (4397652) Tapered Roller Bearing

Part Type: Single-row tapered roller bearing (double-row configuration optional), withstands radial + bidirectional axial loads, suitable for medium-load, medium-speed applications

Material: Inner/Outer Ring (Chromium-Molybdenum Alloy Steel, Carburized and Quenched HRC58-62), Rollers (High-Carbon Chromium Bearing Steel GCr15, Quenched HRC60-64), Cage (Stamped Steel Plate/Phenolic Resin)

Key Dimensions: Inner Diameter 88.90mm (k6 tolerance), Outer Diameter 152.40mm (r6 tolerance), Width 36.51mm diameter, cone angle 10°30′, roller diameter 12.70mm, number of rollers 18

Structural Features: Integral cage, inner ring guided, outer ring with retaining groove, contact angle 15°, rated dynamic load 145kN, rated static load 185kN

Compatible Structures: Journal fit tolerance k6, bearing housing bore fit tolerance H7, interference fit 0.015-0.025mm, operating temperature -40℃ to +120℃

Lubrication Requirements: Oil lubrication (CAT DEO-ULS 15W-40), lubrication pressure 0.20-0.35MPa, flow rate ≥0.5L/min

Compatible Machines and Assemblies:

Loaders: CAT 950M, 962M, 972M (front drive axle differential assembly)
Excavators: CAT 320GC, 323GC, 326GC (Walking Motor Reducer Output Shaft)
Compatible Assemblies: Drive Axle Differential Housing, Gearbox Output Shaft Bearing Housing, Steering Knuckle Kingpin
Matching Parts: 439-7652 Bearing, 8T-4125 Elastic Retaining Ring, M10×1.5 Bolts (2 pieces), Bearing Adjusting Shims (Thickness 0.10-0.50mm)
Installation and Fitting Points:
Clean the journal and bearing housing bore, ensuring no burrs or oil contamination. Journal surface roughness Ra≤0.8μm, bearing housing bore Ra≤1.6μm.

Hot fitting (bearing heated to 80-90℃) or cold pressing installation, pressure ≤30kN. Use a special guide sleeve to ensure coaxiality. Do not strike the inner or outer rings.

After installation, adjust the axial clearance to 0.020-0.040mm, bearing preload torque to 15-20N・m, ensuring smooth rotation without jamming or abnormal noise.

The interference fit with the journal is 0.015-0.025mm, the clearance with the seat hole is 0.005-0.015mm, and the end face runout is ≤0.03mm.