CAT 455-5324 Spindle Retainer

CAT 455-5324 is a Caterpillar genuine spindle end retainer (circlip retainer) used for axial anti-migration positioning of the final drive spindle and bearing. The following is structured original data, excluding replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 455-5324, Type: Shaft Elastic Retaining Ring (GB/T 894.1), Material: 65Mn Spring Steel, Quenched + Low-Temperature Tempering, Hardness: HRC 42-48, Surface Oxidation: Blackened, Single Weight: 0.08 kg, Operating Temperature: -40℃ to +150℃, Suitable for Mandrel Diameter: φ75 mm, Axial Static Load: ≤6 kN, Suitable for Medium and Low Speed ​​(≤1500 r/min) Conditions

Key Dimensions Inner Diameter: 75.0 mm (2.953 in), Outer Diameter: 85.0 mm (3.346 in), Thickness: 2.5 mm (0.098 in), Opening Width: 8.0 mm, Opening Gap: 1.2-1.8 mm, Inner Diameter Tolerance: +0.030/-0.015 mm, Outer Diameter Tolerance: + 0.020/-0.008 mm, thickness tolerance ±0.08 mm, end face runout ≤0.05 mm
Compatible Models and Parts: Compatible with Cat 966H/G, 972H/G loaders; D6N, D7N bulldozers; final drive spindles of 320D/323D excavators. Mounted on the outside of the tapered roller bearing, it engages with the annular groove on the shaft. One spindle per shaft to prevent axial movement of the bearing, and is positioned with the shaft shoulder.

Performance Parameters: Elastic limit ≥800 MPa, tensile strength ≥1000 MPa, fatigue life ≥5000 hours, radial preload after assembly 1.2-1.8 kN, groove width 3.0 mm, groove diameter 75.0 mm, groove depth 1.5 mm
Structural and Performance Advantages: 65Mn Spring steel material: Excellent elasticity and toughness, strong resistance to deformation after quenching, suitable for spindle vibration conditions, and prevents the retaining ring from loosening.

Opening elastic design: Allows for radial expansion during installation, automatically springs back after being inserted into the groove, and fits tightly with the groove, with an axial positioning error ≤0.05 mm.

Oxidized black surface: Enhances corrosion resistance, suitable for dusty and humid environments in engineering machinery, preventing rust from causing jamming or failure.

Original factory precision manufacturing: Strict dimensional tolerances, precise matching with the spindle groove, zero-gap fit, ensuring the axial positioning accuracy of the spindle and bearing.

Installation and maintenance points (original data)

Installation procedure: Clean the spindle groove and retaining ring. Use retaining ring pliers to expand the opening, insert into the φ75 mm spindle groove, release the pliers, and check that the retaining ring is fully engaged, ensuring a tight fit with the bearing inner ring end face without gaps, with axial movement ≤0.05 mm.

Maintenance Cycle: Check the retaining ring’s elasticity and surface condition every 2000 hours. Replace it immediately if deformation, cracks, or corrosion are found. Simultaneously check the wear of the mandrel grooves.

Common Troubleshooting: Retaining ring detachment is often due to groove wear, requiring groove repair or mandrel replacement; loss of elasticity necessitates replacement with a new retaining ring; clean surface rust and apply anti-rust grease, replacing the ring if severely corroded.