CAT 453-2425 Tapered Roller Bearing

CAT 453-2425 is a Caterpillar genuine single-row tapered roller bearing (complete assembly, including inner ring/rollers/cage/outer ring), suitable for heavy-duty components such as the swing gearbox of Cat 320D2/323D2 excavators and the hydraulic cylinder articulation of the 966M loader boom, used to withstand radial + unidirectional axial combined loads. The following is professional structured information:

Core Technical Parameters (Professional Version)

Item Details
Basic Attributes
Model: 453-2425, Type: Single-row tapered roller bearing (complete assembly), Material: 52100 high-carbon chromium bearing steel (vacuum degassed), Inner diameter: φ80 mm (3.150 in), Outer diameter: φ140 mm (5.512 in), Width: 38 mm (1.496 in), Weight: Approx. 3.2 kg, Rated dynamic load: 145 kN, Rated static load: 170 kN, Contact angle: 15°, Compatible with NLGI 2. Lithium-based grease (with EP additive), IP65 corrosion resistance, with stamped steel cage (18 rollers per row)

Key Dimensions: Inner diameter tolerance +0.010/-0.008 mm, outer diameter tolerance +0.025/-0.015 mm, width tolerance ±0.12 mm, inner hole surface roughness Ra≤0.8 μm, outer diameter Ra≤1.6 μm, end face runout ≤0.05 mm, coaxiality ≤0.03 mm, roller diameter φ13 mm, roller length 24 mm

Material and Process: 52100 bearing steel forging → precision machining → integral quenching (HRC 60-64) → ultra-precision grinding, tensile strength ≥1800 MPa, yield strength ≥1500 MPa, hardened layer depth 1.8-2.2 mm, inner ring interference fit with shaft (0.018-0.028 mm) The outer ring and mounting seat clearance fit is 0.02-0.03 mm. Compatible models: Cat 320D2/323D2/326D2 excavator boom lifting cylinder lower hinge, 966M/972M loader boom cylinder upper hinge, D6K/D7E bulldozer steering clutch bearing. Suitable for heavy-duty transmission/hinged parts with a shaft diameter of φ80 mm. Often used with 453-2426 bearing housing. Assembly fit: Interference fit with shaft (0.018-0.028 mm). After installation, the bearing and journal locating surface should be in contact (deviation ≤0.1 mm). It is recommended to use a bearing heater (80-100℃) for heat fitting during installation. Cold installation and forceful hammering are strictly prohibited. Working clearance: 0.08-0.12 mm. Installation and maintenance points: Before installation, clean the bearing, journal, and mounting seat, checking for cracks, raceway pitting, or roller damage. After heating the inner ring to 80-100℃ for 15-20 minutes, heat-fit it to the journal. Use a dial indicator to check the coaxiality; it should be ≤0.03 mm.

After installation, test for smooth, unrestricted rotation. Perform a 30-minute no-load test run, monitoring the temperature to ≤80℃. Check every 1500 hours. Replace immediately if raceway wear >0.15 mm, or if peeling or abnormal noise occurs.

The initial grease filling should be 1/3 of the bearing volume. Replenish every 1000 hours. In dusty/humid conditions, shorten this to 500 hours. Avoid mixing different types of grease.