CAT 132-4295 CAGE

CAT 132-4295 is a stamped cage assembly for Caterpillar needle roller bearings, adapted for the boom/thrust pins and bucket linkage pivots of Cat 305.5-308 mini excavators and 242D/252D skid steer loaders. It is used to isolate the needle rollers, guide orderly rolling, and bear radial loads, and is a key transmission component for reducing pivot friction and wear. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 132-4295, Type: Stamped steel needle roller cage (without inner ring), Material: Low carbon steel 1010/1015 (phosphated surface), Single weight: Approximately 0.21 kg, Applicable temperature: -40℃ to +120℃, Lubrication method: Grease lubrication (Cat Moly Grease recommended), Matching pin diameter: 45 mm, Matching needle roller model: 132-4296

Key Dimensions
Inner diameter: 45.00 mm (tolerance 0/+0.02 mm), Outer diameter: 52.00 mm (tolerance -0.01/-0.03 mm), Length: 50.00 mm (tolerance ±0.10 mm), Needle roller diameter: 4.0 mm (quantity: 14 pieces, spacing: 3.57 mm), Cage wall thickness: 1.2 mm, Chamfer at both ends: r=1.0 mm, Surface roughness: Ra≤1.6 μm, hardness HV380-450, phosphating film thickness 5-8 μm
Compatible Models and Applications: Compatible with Cat 305.5E2, 306E2, 307E2, 308E2 excavators, 242D, 252D skid steer loaders, mounted on the boom-thrust pin shaft and bucket linkage pivot, with matching bearing housing 526-9330, 1 set per pivot
Performance Parameters: Rated radial load 22 kN, ultimate radial load 40 kN, coefficient of friction μ≤0.008 (lubricated state), limiting speed 2800 rpm, fatigue life ≥5×10⁶ cycles, impact load ≥10 kN, salt spray test ≥240 hours, pocket alignment tolerance ≤0.03 mm
Structural and Performance Advantages: Lightweight stamped steel construction: low carbon steel stamping, reducing weight by approximately [missing information] compared to solid brass cages. 30% tensile strength ≥450 MPa, suitable for the pivot movement of small equipment with high-frequency start-stop. Phosphated surface reduces friction between needle rollers and cage, minimizing wear.

Precise needle roller positioning: Equally spaced pocket design ensures needle rollers are free from offset and jamming, guiding even force distribution, reducing localized wear on the pin, and improving pivot movement stability, suitable for the high-precision operation requirements of small equipment.

Harsh working conditions resistance: Phosphated surface resists mud, water, and dust corrosion, suitable for humid and dusty outdoor environments. The gap between the needle rollers and cage (0.02-0.05 mm) provides lubrication space, preventing dry friction overheating and seizing.

Modular assembly: Installed with needle rollers and bearing housings, simplifying the assembly process. The entire assembly can be replaced during maintenance, improving maintenance efficiency and reducing downtime.

Installation and maintenance points: Clean the cage, needle rollers, and bearing housing before installation. Use a special tooling to insert the needle rollers and press the entire assembly into the bearing housing. After pressing, check that the needle rollers rotate freely. Do not strike the cage to prevent pocket deformation and needle roller detachment.

Inspect the cage every 1500 hours of maintenance: replace immediately if the pockets are deformed, the phosphate coating is peeling off, or the needle rollers are loose; ensure the gaps are filled with grease through the grease fitting to prevent dry friction.

Prioritize using original equipment manufacturer (OEM) cages. Aftermarket parts may have misaligned pocket dimensions, causing the needle rollers to jam, leading to severe wear on the pins and bearing housings, and affecting the safe operation of the equipment.