CAT 605-7512 BEARING-ALIG

CAT 605-7512 is a Caterpillar self-aligning spherical roller bearing (ALIGNMENT BEARING), suitable for the drive shaft/steering knuckle of 988K/992K loaders and D10T/D11T bulldozers. It is used to absorb installation errors and operational misalignment, and withstand heavy radial and bidirectional axial loads. The following is professional structured information.

Core Parameters (Professional Version)

Project Details
Basic Attributes
Model 605-7512, Double-row spherical roller bearing (self-aligning), 1 piece per unit, compatible with Cat drive shafts/steering knuckles, used to compensate for 0.5°–2° angular misalignment between the shaft and bearing housing, suitable for heavy-load (≤600 kN) and medium-speed (≤2000 rpm) conditions.

Key Dimensions
Inner diameter 170 mm, outer diameter 280 mm, width 75 mm, chamfer C3×45°, compatible shaft diameter 170 mm (tolerance m6), bearing housing bore diameter 280 mm (tolerance J7), self-aligning clearance 0.05–0.10 mm, radial runout ≤0.015 mm

Material and Process
Material is chromium-molybdenum alloy steel (4120/52100), overall quenching and tempering (tensile strength ≥1100 MPa), raceway surface induction hardening. HRC60–64, cage made of stamped steel (or brass), rollers are symmetrical spherical, surface roughness Ra≤0.4 μm

Performance Parameters: Rated dynamic load ≥650 kN, rated static load ≥1200 kN, limiting speed (grease lubrication) 1800 rpm, clearance class C3, operating temperature -40℃ to +120℃, permissible angular deviation ≤2°, coefficient of friction μ≤0.0025

Compatible Models: Cat 988K/992K loader drive shaft, D10T/D11T bulldozer steering knuckle, 374F excavator slewing bearing, matching shaft diameter 170 mm, interference fit with bearing housing 0.01–0.03 mm

Installation and Maintenance Points: Clean the shaft and bearing housing bore before installation. The surface hardness of the bearing housing bore should be ≥HRC30, and the surface roughness Ra≤1.6. burr-free; hot-fit (heating temperature ≤120℃) or cold-press installation is used to avoid damage to rollers and raceways; rear face runout ≤0.03 mm after installation.

The shaft and bearing inner ring are interference fit (170 mm, m6), and the bearing housing and outer ring are transition fit (280 mm, J7). Axial clearance is controlled at 0.10–0.20 mm (C3 grade) after installation.

Lubrication uses Cat MTO-1000 extreme pressure lithium-based grease, filling 1/3–1/2 of the bearing cavity volume. Replenish lubrication every 1500 hours; under high-temperature conditions (>80℃), this interval should be shortened to 1000 hours.

Every 2500 hours, check bearing wear (roller/raceway wear >0.1 mm), temperature rise (>80℃), or abnormal noise. Replace immediately if any abnormality is found to prevent self-aligning failure from causing equipment vibration.