CAT 3H-8363 RACE

CAT 3H-8363 is a Caterpillar original bearing race/cup, mostly the outer ring (cup-shaped race) of tapered roller bearings. It is suitable for the transmission, steering, or chassis components of heavy equipment, used to form a complete raceway with the inner ring and rollers, bearing radial and bidirectional axial combined loads, ensuring smooth operation of rotating parts. The following is key information.

Core Technical Parameters

Item Details
Part Model: CAT 3H-8363 (Bearing seat ring, single piece, compatible with tapered roller bearings)

Material: 52100 high-carbon chromium bearing steel, integral quenching + tempering treatment, raceway surface precision ground, hardness HRC 60-64, wear-resistant and fatigue-resistant

Key Dimensions: Inner diameter approx. 85mm, outer diameter approx. 130mm, width approx. 25mm, raceway cone angle 12°, mounting surface roughness Ra≤0.8μm, compatible inner ring models are mostly 3H series corresponding specifications

Single Weight: Approx. 0.82kg (1.81 lbs)

Core Compatibility: Matching tapered roller bearings, suitable for wheel ends, differentials, steering knuckles, etc. of CAT loaders, excavators, graders, and other heavy equipment.

Performance Characteristics The tapered raceway precisely fits the rollers, simultaneously bearing radial and bidirectional axial loads. The precision-ground surface reduces the coefficient of friction, making it suitable for heavy-duty and impact conditions.

Structure and Core Functions

Composite Load Bearing Structure: Made of quenched and precision-ground 52100 bearing steel, the tapered raceway perfectly matches the tapered rollers, efficiently transmitting and dispersing the radial and axial composite loads of heavy equipment, avoiding localized stress concentration, and extending the service life of the bearing assembly.

Positioning and Guiding Function: As the outer ring (cup-shaped housing ring), it is installed in the bearing housing bore, providing precise positioning for the inner ring and rollers, ensuring the coaxiality of rotating components, and reducing vibration and noise during operation.

Wear-Resistant and Impact-Resistant Design: The high-hardness raceway surface can withstand frequent friction and impact conditions, preventing raceway wear, pitting, or spalling, suitable for long-term stable operation under complex conditions in engineering machinery.

Assembly Compatibility: Standardized size design allows for quick assembly with corresponding inner ring and roller assemblies, facilitating original equipment manufacturer (OEM) bearing assembly replacement, ensuring equipment maintenance efficiency and assembly accuracy.

Compatible Models and Application Scenarios

Compatible Equipment: CAT 950M, 966K/XE loaders, 320D2, 336D2 excavators, 140M/160M graders, and wheel ends and transmission systems of some mining trucks.

Installation Locations: Wheel end bearing housings, differential output ends, steering knuckle support bearings, drive shaft support housings, and other rotating parts requiring combined load support.

Core Applications: Provides outer raceways for tapered roller bearings in heavy equipment, bearing combined radial and axial loads, ensuring smooth operation of rotating components, suitable for heavy-load, impact, and high-frequency rotation conditions, and is a key component for wheel end and transmission system maintenance.