CAT 584-0349 Cone Tapered Roller Bearing

CAT 584-0349 YM is a Caterpillar tapered roller bearing inner ring, suitable for conventional load wheel ends/drive systems of medium-duty loaders, mining trucks, etc. It is used in conjunction with the outer ring and roller assembly to withstand radial and bidirectional axial loads. The following is core technology and application information:

Core Technical Parameters
Item Details
Part Model: CAT 584-0349 (5840349) YM Tapered Roller Bearing Inner Ring (Suitable for conventional loads, with outer ring 584-0350, roller assembly 584-0351, cage 584-0352)

Core Material: 20CrMnTi alloy carburized steel, surface carburized and quenched, hardness HRC 58–62, carburized layer depth 0.8–1.0 mm, tapered surface roughness Ra 0.8 μm, compatible with NLGI 2 lithium-based grease

Key Dimensions: Inner diameter 85 mm, outer diameter 112 mm mm, taper 1:12, width 35 mm, single weight approx. 1.85 kg (4.08 lb)

Rated Load: Rated dynamic load 125 kN, rated static load 180 kN, limiting speed 2800 rpm, operating temperature -30℃ to +120℃

Compatible Models: CAT 930M/950M loaders (front axle wheel end), 834G/854G mining trucks (steering knuckle), 320GC excavators (slewing bearing assembly)

Suitable Working Conditions: Conventional load, continuous operation, speed ≤2000 rpm, capable of withstanding moderate impact loads

Core Functions and Structural Features:

High adaptability: YM conventional load type, alloy carburized steel material, good impact resistance and wear resistance, compatible with wheel end/drivetrain, standard working condition life can reach over 8000 hours.

Precise Assembly: The tapered surface is interference-fitted with the shaft (interference 0.02–0.04 mm), ensuring radial runout ≤0.02 mm after assembly, guaranteeing the bearing assembly’s operational accuracy.

Load Adaptability: Working in conjunction with the outer ring and roller assembly, it simultaneously withstands radial and bidirectional axial loads, suitable for continuous operation scenarios with moderate impact.

Installation and Maintenance Points
Installation Specifications: Clean the journal and inner ring tapered surface, ensuring they are free of oil and rust. Use hot fitting (heated to 80–100℃) or cold pressing, controlling the pressing force to 15–20 kN. Do not strike the end face.

Journal tolerance: +0.01–+0.03 mm. After installation, check that the tapered surface contact rate is ≥85% and the radial runout is ≤0.02 mm.

After installation, apply NLGI 2 lithium-based grease to ensure uniform roller assembly clearance.

Maintenance Recommendations:

Check the operating status every 1000 working hours, looking for any abnormal noises, abnormal temperature rises, or seal leaks.

Replace the bearing immediately when the inner diameter wear exceeds 0.12 mm. When replacing, replace the outer ring, roller assembly, and cage simultaneously to ensure bearing assembly performance.