Description
CAT 254-0024 Fan Drive Support Pillow Block Bearing
| CAT 254-0024 Fan Drive Support Pillow Block Bearing |
| CAT 276-4441 Idler Bearing Cap |
| CAT 4V-4164 22mm Outside Diameter Steel Flange Terminal Sleeve Bearing |
| CAT 2G-8234 107.79mm Internal Diameter Steel Spacer |
| CAT 333-2916 Bearing – Needle(Debris Resistant) |
| CAT 346-5215 Bearing – Needle(Debris Resistant) |
| CAT 123-8912 Bearing-Caged Roller Assembly |
| CAT 177-4144 Bearing – Cup(Debris Resistant) |
CAT 254-0024 is a Caterpillar double-row cylindrical roller bearing specifically designed for boom columns, suitable for boom columns, slewing bearings, or lifting mechanisms in excavators, loaders, and other equipment. It primarily withstands heavy radial loads and minor bidirectional axial forces. The following is structured and precise information.
Core Parameters (Professional Version)
Project Details
Basic Attributes Model 254-0024, Double-row cylindrical roller bearing (including inner ring, outer ring, double-row rollers, and cage), used in boom columns, lifting mechanisms, and slewing bearing shaft systems. Quantity per unit: 1–2 pieces (depending on column structure requirements)
Key Dimensions Inner diameter 120 mm, outer diameter 215 mm, width 73 mm, cylindricity ≤0.005 mm, compatible shaft diameter 120 mm (h6 tolerance), mounting hole diameter 215 mm (H7 tolerance)
Material and Process High-carbon chromium bearing steel (SAE 52100), integral quenching + tempering, raceway ultra-precision grinding, hardness 60–64 HRC, cage is integral brass, roller surface convex design to reduce edge stress
Performance Parameters Radial rated dynamic load Cr≈380 kN, radial rated static load C0r≈520 kN, suitable speed ≤2800 rpm, operating temperature -40℃ to +120℃, axial load ≤15% radial load
Compatible models: Cat 320/330 excavators, 950/962 loaders, some boom column assemblies, lifting mechanism shafts
Installation and maintenance points:
Clean the bearings and mounting seats before installation, ensuring no burrs or rust. The journal surface roughness Ra≤0.8 μm, and the mounting hole roundness≤0.01 mm.
Use hot fitting (inner ring heated to 80–100℃) or cold pressing. Use specialized tooling to distribute force evenly, avoiding impact damage to the raceways and rollers.
After assembly, adjust the radial clearance (0.12–0.18 mm) according to the machine model’s maintenance manual to prevent bearing seizure or accelerated wear.
It is recommended to check the bearing temperature (≤80℃) and vibration every 2000 hours. If abnormal, disassemble and inspect, and replace worn parts.
