296-6248: Bearing – Needle(Debris Resistant)

Cat 296-6248 is a Caterpillar double-row tapered roller bearing assembly, integrating the inner and outer rings, rollers, cage, and seals. It is suitable for excavator swing mechanisms, loader drive axles, etc., and can simultaneously withstand radial and bidirectional axial loads. The following are precise core information:

Core Parameters (Precise Version)

Item Details
Basic Information
Model 296-6248, type is double-row tapered roller bearing assembly, with integrated labyrinth seal and preload gasket, suitable for heavy-duty and impact conditions, used for positioning and support of gear shafts and output shafts in equipment transmission systems, ensuring transmission accuracy and stability, especially suitable for parts that need to withstand radial and axial loads simultaneously.

Compatible Models
Compatible with Cat 320D2/D3 excavators, 966M loaders, D6R bulldozers, 773 mining trucks, etc., commonly used for swing motor output shafts, drive axle main reducers, and gearbox differential shaft support.

Material and Manufacturing Process Material: High-carbon chromium bearing steel (100Cr6), vacuum degassed + forged + integrally quenched and tempered, hardness HRC28-32; raceway and roller surfaces carburized and quenched, hardness HRC60-64, surface grinding precision Ra≤0.2μm; cage is integrally machined brass, possessing good lubrication and heat dissipation.

Key Dimensions: Inner diameter 140mm, outer diameter 225mm, total width 80mm, chamfer C3, roller diameter 20mm, number of rollers 32 (double row), weight approximately 12.5kg, dimensional tolerance ±0.02mm, interference fit with shaft 0.02-0.04mm, radial clearance 0.04-0.07mm.

Compatible Parts: Compatible shaft model 12-4567 (diameter 140mm, length 400mm), compatible bearing housing model 296-6249; recommended use: extreme pressure lithium-based grease (model…). (10-9275), installation coaxiality requirement ≤0.03mm. Functions, Installation, and Maintenance Points:

Core Functions: Simultaneously withstands high radial loads and bidirectional axial loads, restricts bidirectional shaft movement, adapts to medium-speed heavy-load and impact conditions, ensures transmission system positioning accuracy and operational stability, and extends component life.

Installation Points: Use cold or hot installation (oil temperature 80-90℃), do not forcefully hammer; adjust the preload during installation to ensure the bearing operates smoothly without jamming; the bearing housing bolt torque value is 280-300 N·m, tighten evenly diagonally.

Maintenance Points: Check lubrication and sealing conditions every 500 hours, replenish grease every 800 hours; when pitting or peeling appears on the roller surface, or the wear exceeds 0.2mm or the radial clearance is greater than 0.15mm, replace immediately to prevent component damage.