CAT 293-1986 57.15mm Inner Diameter Fan Shaft Bearing

CAT 293-1986 is a Caterpillar single-row tapered roller bearing for drive axles and transmissions in mini excavators/loaders. It is compatible with Cat 906/907/908 mini loaders and 307/308/309 series excavators, and is designed to withstand high radial and unidirectional axial loads. The following is precise technical and application information.

Core Parameters (Precise Version)

Item Details
Basic Attributes
Model 293-1986, Single-row tapered roller bearing (including inner ring, outer ring, rollers, and cage), withstands high radial + unidirectional axial loads, suitable for heavy-duty parts such as drive axle differentials and main reducers, 1-2 pieces per unit

Compatible Models: Cat 906, 907, 908 small wheel loaders, 307/307.5/308/309 series mini excavators, compatible drive axle models 155-4022, 155-4023, gearbox models 416-4000, 416-4001

Material and Process: Bearing steel (52100 chromium alloy), inner/outer ring hardness HRC 60-64, roller hardness HRC 62-66, stamped steel cage, contact nitrile rubber seal, radial clearance C3 (medium grade), precision grade ISO P0 Key Dimensions: Inner diameter 65mm, outer diameter 120mm, width 29mm, chamfer R1.5mm, weight approx. 1.2kg
Performance Parameters: Basic rated dynamic load 82kN, basic rated static load 105kN, grease-lubricated limiting speed 3800rpm, oil-lubricated limiting speed 4800rpm, operating temperature -40℃ to +120℃, installation interference 0.02-0.04mm
Core Functions and Application Scenarios:
Heavy Load Bearing: The single-row tapered roller structure can withstand high radial loads (≤55kN) and unidirectional axial loads (≤30kN), suitable for heavy-duty components such as drive axle differentials and main reducers.

Positioning and Locking: Limits radial displacement and unidirectional axial movement of the shaft, assists in differential assembly positioning, prevents gear meshing clearance changes, and is suitable for medium-high speed and high-frequency impact conditions.

Typical location: One end of the drive axle differential, the output shaft end of the gearbox, used to connect the differential housing and the half shaft, transmitting power and bearing driving and operating loads.

Installation and Maintenance Points

Before installation: Clean the journal and bearing housing bore, check the bearing for deformation, cracks, or roller spalling; measure the clearance between the journal and the bearing inner diameter to be 0.02-0.04mm, prepare the press-in tool and hydraulic pump station (press-in pressure approximately 12-18kN).

During installation: Maintain coaxiality during press-in, apply uniform pressing force, and after press-in, check the bearing end face runout to be ≤0.1mm; after installation, inject extreme pressure lithium-based grease (NLGI 2) to ensure adequate lubrication.

Maintenance and replacement: Check the bearing operating noise and temperature every 5000 hours. If abnormal noise, temperature exceeding 85℃, or radial clearance exceeding 0.20mm occurs, replace immediately. Welding or repair by welding is prohibited.