CAT 538-5938 BEARING–SEM

CAT 538-5938 BEARING–SEM

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Description

CAT 538-5938 BEARING–SEM

CAT 538-5938 BEARING–SEM
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CAT 538-5938 SEM is a Caterpillar genuine single-row tapered roller bearing outer ring (cup), compatible with drive axle differentials/main reducers. The following is purely accurate information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 538-5938 SEM (5385938) Tapered Roller Bearing Outer Ring (Cup)

Part Type: Single-row tapered roller bearing outer ring, matched with the inner ring, withstands radial + unidirectional axial loads, suitable for low-speed, heavy-load conditions

Material: SAE 52100 high-carbon chromium bearing steel, hardened to HRC60-64, raceway surface roughness Ra≤0.08μm

Key Dimensions: Inner diameter 90.00mm, outer diameter 150.00mm, total width 32.00mm, large end chamfer 2×45°, small end chamfer 1×45°

Structural Features Integral outer ring, double flanges, raceway cone angle 12°, locating groove depth 2.2mm, compatible with inner rings 538-5937

Compatible Structure: Bearing housing fit tolerance J7, interference fit 0.010-0.020mm, rated radial load 185kN, operating temperature -40℃ to +120℃

Lubrication Requirements: Compatible with oil lubrication (CAT DEO-ULS 15W-40) or grease lubrication (CAT 4V-9668)

Compatible Machines and Assemblies:
Loaders: CAT 950M, 962M (front drive axle differential)
Excavators: CAT 323GC, 326GC (travel drive axle main reducer)

Compatible Assemblies: Drive axle differential bearing assembly, main reducer input shaft bearing assembly

Matching Parts: 538-5938 SEM outer ring, 538-5937 inner ring, 8T-4125 Elastic retaining ring, 166-3675 side cover
Installation and Fitting Points:
Clean the outer ring raceway and bearing housing bore. Cold press installation, pressure ≤30kN. Do not strike the end face.

Bearing housing J7 tolerance, interference fit 0.010-0.020mm, ensuring space for thermal expansion and contraction.

After assembly with the inner ring, axial clearance should be controlled at 0.025-0.040mm, ensuring smooth rotation.

Use a dedicated puller for disassembly. During replacement, inspect the raceway for pitting and peeling.

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