CAT 235-1358 BEARING

CAT 235-1358 (2351358) is a Caterpillar double-row tapered roller bearing, suitable for drive axle hubs of wheel loaders/excavators. It is used to withstand high radial and bidirectional axial combined loads, ensuring precise positioning and smooth operation of the hub under heavy-duty conditions. The following are the core information:

Core Technical Parameters
Item Details
Part Model: CAT 235-1358 (2351358) Double-row Tapered Roller Bearing (Suitable for drive axle hubs, withstands radial and bidirectional axial loads, ensuring heavy-duty positioning)

Core Material: Bearing steel (GCr15SiMn, HRC 60–64), raceway ultra-precision ground (Ra≤0.08 μm), cage: stamped steel plate (impact resistant, suitable for heavy-duty conditions), surface: anodized for rust prevention, compatible with lithium-based grease (NLGI 2, -20℃ to +120℃)

Key Dimensions: Inner diameter 85 mm, outer diameter 180 mm, width 64 mm diameter, cone angle 12°, raceway curvature radius 42 mm, mounting surface runout tolerance ≤0.02 mm, compatible with M16×1.5 bolts (mounting hole spacing 160 mm)

Single weight: Approx. 4.2 kg (9.26 lb)

Compatible models: CAT 950H/966H wheel loaders (drive axle hub), 320D/323D excavators (final drive), compatible drive axle models 8J-5200/8J-5201, commonly used with 6W-4765 retainer

Operating compatibility: Rated radial load 280 kN, rated axial load 220 kN, limiting speed 2800 rpm, operating temperature -30℃ to +120℃, suitable for dust/ Complex working conditions on construction sites such as those involving crushed stone

Core Functions and Structural Features

Bidirectional Load Bearing: The double-row tapered roller design can simultaneously withstand high radial loads and bidirectional axial loads, suppressing bidirectional movement of the wheel hub shaft system and ensuring positioning accuracy under heavy-duty transmission.

High-Precision Fit: Ultra-precision grinding of the raceway and precise machining of the tapered surface control the fit clearance with the bearing housing within 0.01–0.03 mm, ensuring bearing preload accuracy and reducing transmission impact and noise.

Impact and Wear Resistance: GCr15SiMn bearing steel is quenched, with an impact load resistance of 320 kN. The cage is made of stamped steel plate, improving impact and deformation resistance, suitable for complex construction site conditions.

Modular Matching: Modularly matched with the 6W-4765 drive axle wheel hub bearing retainer, simplifying the assembly process and adapting to the standard mounting interface of CAT drive axles.

Installation and Maintenance Points

Installation Specifications
Clean the mounting surface, ensuring it is free of rust, oil, and burrs. Bearing housing tolerance: +0.01–+0.03 mm, ensuring precise fit.

Hot mounting (oil temperature 80–90℃, heating for 20–30 min) or cold pressing installation. Do not strike the end face to avoid damage to the raceway.

During assembly, control the preload to 0.02–0.04 mm. Use M16×1.5 bolts (grade 10.9) for symmetrical tightening, with a torque of 120–130 N·m.

Maintenance Recommendations
Inspect every 1200 working hours: check for bearing cracks, raceway peeling, seal damage, and grease leakage. Replace any damaged bearings immediately.

Before long-term storage (>30 days), rotate the bearing 5–8 times to ensure even grease coverage of the raceway, preventing dry friction and corrosion.

When replacing parts, prioritize CAT original parts or YM/SEM/GD quality parts of the same specifications to ensure compatibility with the retainer and bearing race.