CAT 567-7155 Single Row Tapered Roller Bearing

CAT 567-7155 is a Caterpillar single-row tapered roller bearing, suitable for Cat 326D2, 395 and other excavator final drives, slewing bearings and other parts. It can withstand radial and bidirectional axial combined loads, ensuring smooth operation of the transmission system (Cat® Parts). The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 567-7155, Type: Single-row tapered roller bearing (separate type), Material: High carbon chromium bearing steel (chromium content 1.5%), Outer ring, inner ring, and rollers are hardened, Hardness HRC60-64, Single weight approximately 5.8 kg, Applicable temperature: -40℃ to +120℃, Lubrication method: Grease lubrication / Oil lubrication, Limiting speed: Grease lubrication 1800 rpm, Oil lubrication 2400 rpm (Cat® Parts)

Key Dimensions
Inner diameter 120.0 mm (tolerance 0/-0.015 mm), Outer diameter 215.0 mm (tolerance 0/+0.02 mm), Width 61.5 mm (tolerance ±0.10 mm), Number of rollers: 18, Roller diameter: 18.0 mm, Taper angle: 12°, cage material: stamped steel plate, inner ring large end face diameter: 145.0 mm, outer ring small end face diameter: 190.0 mm. Cat® Parts. Compatible Machines and Applications: Compatible with Cat 326D2, 336D2, 395 and other tracked excavators, used in final drive planetary gear shafts, slewing bearing drive shafts, and track tensioning cylinder support shafts. Matching parts include 567-7154 seals and 7T-4214 retainers. Used to withstand combined radial and axial loads, position gears and shafts, and reduce operational wear. Cat® Parts. Performance Parameters: Rated dynamic load: 480 kN, rated static load: 720 kN, contact fatigue life: ≥10000 hours, roller surface roughness Ra≤0.05 μm, inner ring runout ≤0.02 mm, outer ring runout ≤0.03 mm, coefficient of friction ≤0.002, suitable impact load ≤1.2. Doubled Dynamic Load Capacity
Structural and Performance Advantages
Separable Structure: The inner ring, outer ring, and rollers are separable, facilitating installation, disassembly, and maintenance. Suitable for space-constrained transmission components, reducing maintenance difficulty and time costs.

High Load Capacity: The tapered roller design can simultaneously withstand radial and bidirectional axial loads, suitable for heavy-duty conditions such as excavator final drives and slewing bearings, reducing the risk of bearing failure.

Precision Manufacturing and Heat Treatment: Strict dimensional tolerances and surface treatments ensure operational accuracy and stability. Quenching treatment improves surface hardness and wear resistance, extending service life.

Standardized Compatibility: Universal dimensions and mounting interfaces, compatible with various machine models. No additional machining is required, allowing for quick replacement, improving maintenance efficiency and reducing maintenance costs.

Installation and Maintenance Points:

Before installation, clean the bearing, shaft, and bearing housing, checking for burrs and cracks. The inner ring should have an interference fit (0.01-0.02 mm). Use a hot-fit method (oil temperature 80-90℃) to heat the inner ring before installing it onto the shaft. The outer ring should have a clearance fit with the bearing housing (0.01-0.02 mm clearance), ensuring coaxiality ≤0.05 mm. Do not hammer or strike.

After installation, add Cat Moly-Dee grease and run for 30 minutes to confirm there is no jamming, abnormal noise, or abnormal temperature rise. The bearing temperature should be ≤80℃, and axial movement ≤0.05 mm.

Maintenance: Check the bearing condition every 1000 hours. Replace immediately if roller pitting, cage deformation, or axial clearance >0.15 mm is observed. Prioritize original parts to ensure compatibility and performance, avoiding premature damage to the transmission system due to incompatible parts.