CAT 170-4947 60mm Sleeve Bearing

CAT 170-4947 is a Caterpillar original single-row tapered roller bearing, widely used in the drive axle differential, wheel ends, or gearbox output shafts of loaders, excavators, and other equipment. It is suitable for medium-to-high speed and medium-to-heavy load conditions, bearing radial and bidirectional axial combined loads to ensure stable operation of transmission components. It is compatible with Cat® models such as the 950H/962H loader and 320D/336D excavator…

Core Technical Parameters

Item Details
Part Model: CAT 170-4947 Single-Row Tapered Roller Bearing

Material: Chromium-molybdenum alloy steel (e.g., SAE 52100), outer ring, inner ring, and rollers are quenched and tempered, hardness HRC 58-62, cage is made of stamped steel plate/phenolic resin, surface phosphated/oxidized, temperature resistance -40℃ to 120℃, suitable for mineral oil/lithium-based grease lubrication

Key Dimensions: Inner diameter approx. 70-75mm, outer diameter approx. 130-135mm, width approx. 30-35mm, cone angle 10°-15°, number of rollers 12-15, roller diameter 12-14mm, cage clearance 0.10-0.15mm, suitable for journal interference fit (interference amount) (0.01-0.02mm)
Compatible Models: Compatible with 320D/323D/336D excavators, 950H/962H loaders, 430F2 loaders, D6R bulldozers, etc., used in drive axle differentials, wheel end bearings, gearbox output shafts, drive shaft supports, etc.
Performance Characteristics: Basic rated dynamic load approximately 120-150kN, basic rated static load approximately 180-220kN, limiting speed (grease lubrication) approximately 3000r/min, (oil lubrication) approximately 4000r/min, withstands radial and bidirectional axial loads, suitable for medium-high speed and medium-heavy load conditions, possesses good impact resistance and wear resistance.
Core Functions and Structure:
Combined Load Bearing: The tapered structure of the tapered rollers can simultaneously withstand radial and bidirectional axial loads, adapting to complex stress conditions in drive axles, wheel ends, and other transmission components, ensuring stable operation of components and preventing axial movement.

Precise Positioning and Guiding: The inner ring has an interference fit with the journal, while the outer ring has a clearance fit with the bearing housing, ensuring the coaxiality and positioning accuracy of the transmission components, reducing vibration and noise, and improving transmission efficiency.

Wear Resistance and Heat Dissipation: Hardened rolling elements and raceways reduce friction and wear. The cage guides the rollers to distribute evenly, optimizing grease flow and improving heat dissipation, adapting to medium- and high-speed operation requirements.

Installation and Maintenance Points
Installation Specifications: Clean the bearing, journal, and bearing housing surfaces, removing oil, rust, and impurities. Check the bearing for cracks, deformation, and roller jamming. Measure the dimensions of the journal and bearing housing, ensuring an inner ring interference fit of 0.01-0.02mm and an outer ring clearance of 0.02-0.04mm.

Use a special tool to press the inner ring in. The outer ring can be gently tapped into the bearing housing. Do not directly tap the rolling elements and cage. After installation, adjust the axial clearance to 0.05-0.10mm to ensure smooth and unobstructed operation.

After installation, apply lithium-based grease for lubrication, filling the bearing to 1/3-1/2 of its internal space. For medium-to-high speed applications, select NLGI 2 lithium-based grease.

Maintenance Recommendations: Every 2000 operating hours, check the following: bearing operating temperature (normally ≤80℃), vibration and noise; measure axial clearance; replace grease immediately if clearance exceeds 0.20mm; check the grease condition and replace it if it shows signs of deterioration or contamination.

Regularly inspect the seals to prevent impurities and moisture from entering the bearing and accelerating wear. Increase the inspection frequency for harsh operating conditions and address any abnormalities promptly.