CAT 617-1381 BEARING

CAT 617-1381 (6171381) is a Caterpillar genuine double-row tapered roller bearing, suitable for drive axle/transmission differentials of medium-duty wheel loaders, graders, etc. The following is purely accurate information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 617-1381 Double-row Tapered Roller Bearing

Part Type: Double-row tapered roller bearing for drive axle/transmission differentials, bearing radial and bidirectional axial combined loads, used for rotational support between the differential housing and the half-shaft

Material: Bearing steel (chromium-molybdenum alloy steel), inner ring, outer ring, and roller surfaces carburized and quenched, hardness HRC60-64, cage is stamped low-carbon steel, strength and toughness matched to operating conditions

Key Dimensions: Inner diameter 88.90 mm, outer diameter 152.40 mm, width 49.21 mm mm, 16 rollers per row, roller diameter 14.29 mm, roller length 25.40 mm, cone angle 12°30′, inner ring large end diameter 104.78 mm, outer ring small end diameter 136.53 mm

Structural Features: Double-row symmetrical arrangement, with an integral cage, separable inner ring, outer ring with positioning flange, suitable for differential housing interference fit, and clearance fit with half-shaft.

Suitable Structures: Suitable for medium-sized equipment drive axle differential housings and gearbox output shaft support areas, used for transmitting power and bearing the combined loads during vehicle travel and operation.

Applicable Working Conditions: Medium to high speed, medium to heavy load, suitable for operating environments with -30℃ to 120℃, grease lubrication, and vibration and impact, rated dynamic load 280 kN, rated static load 360 kN.

Compatible Models: CAT 950M/962M/966M/972M Wheel Loader (Drive Axle Differential, Gearbox Output End)

CAT 140M/140K/160M Grader (Drive Axle Main Reducer, Differential Support)

CAT 950H/966H/972H Wheel Loader (Gearbox Second Axle Support, Differential Housing Bearing Seat)

CAT 120M/130M Grader (Drive Axle Half Axle Support, Differential End Cover Bearing)

Installation and Fitting Points: The outer ring and differential housing are interference fit (interference 0.015–0.025 mm), and the inner ring and half axle are clearance fit (clearance 0.020–0.035 mm) to ensure rotational accuracy and load transmission.

Use a dedicated pressing tool to press the inner and outer rings separately. Do not directly strike the bearing end face. After installation, the bearing end face should fit snugly against the housing positioning surface without skewing or looseness.

Before installation, clean the bearings, mounting holes, and half-shafts. Inspect the bearings for cracks and roller damage, and check for deformation or breakage of the cage.

Axial positioning is achieved through the housing steps and end cap, while radial positioning is achieved through the housing holes. After installation, the differential assembly should rotate freely, with radial runout of the half-shaft ≤0.05 mm.

After installation, adjust the preload according to the model manual. The preload torque should meet the specifications to avoid premature wear caused by excessive or insufficient bearing clearance.