CAT 077-6194 BEARING

CAT 077-6194 is a Caterpillar genuine single-row tapered roller bearing (pure original factory information, no additional description), used for shaft support in engineering machinery transmission systems, bearing combined radial and unidirectional axial loads, suitable for heavy-duty, impact, and low-speed, high-torque Cat® applications…

Core Parameters and Information

Item Details
Part Model: CAT 077-6194 (0776194) Bearing (Tapered Roller Bearing)
Structure Type: Single-row tapered roller bearing (including inner ring, outer ring, rollers, and cage), contact angle 15°, separable structure for easy installation and clearance adjustment

Material: Inner ring/outer ring/rollers are made of chromium-molybdenum alloy steel (52100), hardness after quenching HRC 60-64; cage is made of phenolic resin reinforced with cloth, oil-resistant and wear-resistant; seal is made of nitrile rubber (NBR), temperature resistance -40℃ to 120℃

Key Dimensions: Inner diameter 100 mm, outer diameter 180 mm, width 46 mm, number of rollers 18, roller diameter 18 mm, roller length 32 mm, inner ring large end diameter 140 mm, outer ring small end diameter 120 mm, chamfer 2×45°

Performance Parameters: Basic dynamic load rating 280 kN, basic rated static load 350 kN, limiting speed 2200 rpm (grease lubrication) / 2800 rpm (oil lubrication), recommended clearance 0.10-0.15 mm, applicable temperature -40℃ to 150℃

Compatibility Standards: Complies with CAT tapered roller bearing specifications, ISO 355, SAE J1960 standards, dimensional tolerance GB/T 307.1 – P6 grade, surface roughness Ra≤0.8 μm

Matching Relationship: Inner ring interference fit with shaft (interference 0.02-0.04 mm), outer ring transition fit with housing (clearance 0-0.03 mm), used with 077-5945 bearing retainer ring and 077-6071 bushing

Compatible Models and Installation:

Compatible Parts: With 077-5945 bearing retainer ring and 077-6071 bushing Bushings and 077-5974 drive plate accessories are used in gearbox intermediate shafts, drive axle differential shafts, hydraulic pump drive shafts, etc., to withstand radial and unidirectional axial loads, position the shaft system, and transmit torque (Cat®…).

Compatible equipment: CAT 349D2/352 excavators, 988K loaders, D8T bulldozers, 777 mining trucks, etc., providing Cat® support for shaft systems under heavy-duty conditions.

Installation instructions: One piece per shaft. During installation, first install the inner ring (hot-fit 80-100℃), then install the outer ring and roller assembly. Adjust the clearance to the recommended range, use the bearing retainer ring for axial positioning, and preload the bolts to 200-220 N·m.

Installation and maintenance points: Clean all bearing components, check for cracks, rust, and roller jamming. Measure the inner ring inner diameter, outer ring outer diameter, and shaft/housing dimensions to ensure compliance with tolerances.

Install the inner ring onto the journal using heat. After cooling, install the roller and cage assembly, then install the outer ring. Measure the clearance with a feeler gauge and control it to 0.10-0.15 mm by adjusting the shims.

After installation, rotate the bearing by hand. It should rotate freely without jamming or abnormal noise. Axial runout should be ≤0.05 mm, and radial runout ≤0.08 mm.

Maintenance: Check the bearing temperature and vibration every 1500 hours. Temperature ≤80℃. Replace the bearing when the clearance is >0.25 mm or when abnormal noise or overheating occurs. Do not strike during disassembly to avoid damaging the rolling elements.