CAT 171-4746 Bearing – Cup(Debris Resistant)

The CAT 171-4746 is a single-row deep groove ball bearing outer ring with chip protection from Caterpillar. It is suitable for the transmission/hydraulic systems of various models of mini excavators and loaders, and is used for radial positioning and light axial load of shafts under harsh working conditions. It can be matched with 237-4360 sleeve and 575-1973 flange sleeve bearings to effectively extend the bearing life of Cat. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 171-4746, single-row deep groove ball bearing outer ring (suitable for open/double-sided sealed bearing inner components), material is high carbon chromium bearing steel (GCr15, quenching hardness HRC60-64, outer ring surface treated with special texture to enhance chip resistance), single weight approximately 0.18 kg, operating temperature -40℃ to +120℃, suitable speed ≤6000 rpm (oil lubrication) / ≤4500 rpm (grease lubrication), withstands radial load + bidirectional light axial load, suitable for medium-high speed, multi-chip conditions (Cat)

Key Dimensions
Inner diameter 47 mm (tolerance 0/-0.012 mm, suitable for inner ring and roller assembly), outer diameter 80 mm (tolerance +0.015/0 mm), width 22 mm (tolerance 0/-0.10 mm), outer ring raceway surface roughness Ra≤0.02 μm, radial runout≤0.01 mm, end face perpendicularity≤0.01 mm, compatible radial clearance C3 (0.015-0.035 mm)

Compatible Models and Parts: Compatible with Cat 307E2 excavator (hydraulic pump drive shaft), 908M loader (transmission input shaft), C7.1 engine (auxiliary drive shaft), 353E skid steer loader (steering pump shaft), with matching 237-4360 sleeve assembly, 575-1973 flange sleeve bearing, 1J-0581 bearing cap, 474-9675 O-ring, 536-2653 bearing inner assembly

Rated Load: Compatible bearing radial rated dynamic load Cr=42 kN, radial rated static load Cor=28 kN, axial rated dynamic load Ca=10 kN, axial rated static load Coa=15 kN, impact load ≥18 kN kN, service life ≥10,000 hours under debris conditions. Debris Resistance Design and Advantages: The outer ring surface utilizes Caterpillar’s proprietary texturing technology to create a microgroove structure that captures and removes metal debris, dust, and other contaminants entering the bearing, reducing raceway wear and fatigue failure risk.

A special heat treatment process enhances the surface hardness and wear resistance of the outer ring, reducing the probability of debris scratching the raceway, making it suitable for high-debris operating environments such as mining and construction.

Compared to ordinary bearing outer rings, this outer ring offers approximately 50% longer service life under high-debris conditions, reducing equipment downtime for maintenance.