CAT 145-6658 197.6mm Inner Diameter Retainer Seal

CAT 145-6658 is a Caterpillar genuine axle retaining ring (external retaining ring/axle clip), suitable for positioning and fixing the shaft ends of components such as engines and transmission systems in small to medium-sized construction machinery. The following are precise original specifications and application information, excluding replacement parts (Cat®…).

Core Technical Parameters

Item Details
Part Model: CAT 145-6658 (Shaft Elastic Retaining Ring / External Circlip)

Material: 65Mn spring steel, quenched and tempered, hardness 48–52 HRC; galvanized and passivated surface, no white rust after 96 h salt spray test, excellent corrosion resistance

Key Dimensions: Inner diameter 35 mm (1.378 in), outer diameter 42 mm (1.654 in), thickness 1.2 mm (0.047 in), opening width 3.0 mm, groove width adaptation 1.3 mm, groove diameter 35.2 mm

Performance Parameters: Radial elastic force ≥ 100 N, ultimate tensile strength 1050 MPa, yield strength 900 MPa, operating temperature -40℃ ~ +150℃, single installation deformation ≤ 0.06 mm

Unit Weight: Approx. 0.012 kg (0.0265 lbs)

Tolerance Standard: Inner diameter tolerance ±0.04 mm, thickness tolerance ±0.02 mm, opening size tolerance ±0.1 mm, surface roughness Ra ≤ 0.8 μm

Surface Treatment: Zinc plating and passivation, suitable for harsh working conditions in engineering machinery such as humid and dusty environments, improving corrosion resistance and wear resistance.

Structure and Core Characteristics:

Open-type elastic structure: Relying on its own elasticity, it is locked within the annular groove of the shaft to achieve axial positioning and fixation of parts on the shaft (such as bearings, gears, sleeves, etc.), preventing axial movement of components and ensuring transmission accuracy and system stability (Cat®…).

High elasticity and high strength: Made of 65Mn spring steel, professionally heat-treated, possessing excellent elasticity and strength, capable of withstanding frequent assembly and vibration conditions, not easily deformed or broken, suitable for medium to light load operating environments.

Precise fit: Strict dimensional tolerances and groove diameter matching design ensure a tight fit with the shaft groove after installation, precise positioning, reliable axial fixation, suitable for compact spaces in small to medium-sized equipment, facilitating maintenance and replacement.

Corrosion-resistant design: Galvanized passivation surface treatment effectively resists corrosive media such as moisture and dust in the working environment of construction machinery, extending service life and reducing maintenance frequency.

Compatible Models and Application Scenarios

Compatible Equipment: CAT 305.5E2/306E2 excavators, 246D/249D skid steer loaders, C4.4/C6.6 engines, 938M loaders, and other small to medium-sized construction machinery (Cat®).

Core Applications: Used for axial positioning and fixing of bearings, gears, gaskets, and other components in engine camshafts, crankshaft front/rear ends, transmission system drive shafts, gearbox gear shafts, and hydraulic pump shafts, preventing axial movement of components during operation and ensuring efficient and stable equipment operation. Suitable for medium to light load conditions (Cat®…).