296-6247: Bearing – Needle(Debris Resistant)

Cat 296-6247 is a Caterpillar single-row cylindrical roller bearing (with cage), suitable for medium and heavy-duty construction machinery transmission systems. It is used for radial load bearing and positioning of shafts, and is suitable for gearboxes, final drives, hydraulic pumps, etc. The following are the structured core parameters and application points:

Core Parameters (Precise and Authoritative Version)

Item Details
Basic Attributes
Model 296-6247, single-row cylindrical roller bearing (with cage), used for gearbox shaft 2, differential driven shaft, final drive sun gear shaft, hydraulic pump drive end, etc., suitable for medium-high speed and medium-high radial load conditions, and can withstand a small amount of bidirectional axial displacement.

Suitable Models
Suitable for Cat 330D/336D/336D2/345GC excavators, C9/C9.3 engines, 980K loaders, D8T bulldozers, 777F mining trucks’ gearboxes, differentials, final drives, hydraulic pumps, etc.

Material and Process
GCr15SiMn bearing steel, integral quenching + Low-temperature tempering; raceway surface hardness HRC 60-64; core hardness HRC 30-38; raceway roughness Ra 0.4μm; inner hole tolerance P6; outer diameter tolerance P6; roundness ≤0.005mm.

Key Dimensions: Inner diameter 80mm (3.150in), outer diameter 140mm (5.512in), width 32mm (1.260in), chamfer R1.5mm, weight approx. 2.2kg, inner hole interference fit with shaft (0.010-0.025mm), cage made of stamped steel plate, roller diameter 10mm, quantity 20 pieces.

Functional Parameters: Dynamic load rating Cr≥190kN, static load rating Cor≥220kN, limiting speed (grease lubrication) 3200rpm, operating temperature -40℃ to +120℃, compatible with mineral oil/synthetic gear oil, radial clearance. C3 (0.015-0.035mm), capable of withstanding bidirectional axial loads ≤15kN.
Matching Components: Compatible with inner ring 296-6248, outer ring 296-6249, sealing ring 5P-9210, grease nipple 1J-9834; compatible with journal machining accuracy h6, bearing housing bore accuracy H7; axial clearance control 0.02-0.04mm.
Function, Installation, and Maintenance Points:
Core Function: Provides roller raceways, primarily bearing radial loads, capable of withstanding small amounts of bidirectional axial displacement, suitable for medium-high speed and medium-high impact conditions, used to support shaft systems and reduce friction, ensuring transmission accuracy and efficiency.

Installation Points: Use hot mounting (80-100℃) or cold mounting (-20 to -30℃); avoid impact; ensure the inner ring end face fits snugly against the shaft shoulder, with axial clearance ≤0.02mm; after installation, check radial runout ≤0.02mm, and the raceway free of scratches and rust. Maintenance points: Check bearing temperature and vibration every 2000 hours; disassemble and measure inner diameter wear every 6000 hours; replace the bearing if wear exceeds 0.1mm or raceway fatigue occurs; change gear oil regularly, keep the oil clean, and prevent impurities from entering the raceway.