CAT 374-1456 BEARING-SLV-GD

CAT 374-1456 is a Caterpillar genuine YM type shaft assembly (integrating shaft, bearing, seals, and positioning structure), adapted to the power input/output ends of engineering machinery gearboxes, drive axles, or hydraulic pumps, used for torque transmission and radial and axial positioning. The following is pure raw data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 374-1456 (YM Shaft Assembly), Type: Integrated Power Transmission Shaft Assembly (including shaft body, single-row tapered roller bearing, double-lip oil seal, locating keyway), Suitable for gearbox secondary shaft, drive axle differential input shaft, hydraulic pump drive end, Single weight 6.2 kg, Operating temperature -40℃ to +120℃, Suitable for extreme pressure gear oil / anti-wear hydraulic oil, Used for torque transmission and rotational positioning under medium-high speed and medium-heavy load conditions, improving the reliability and power transmission efficiency of the transmission system Cat®…

Key Dimensions (Metric / Imperial)
Shaft outer diameter 80.0 mm (tolerance 0/-0.022 mm), Shaft length 280.0 mm (tolerance ±0.15 mm), Mounting keyway width 12 mm, depth 6 mm, Bearing mounting position diameter 75.0 mm (tolerance k6), Shoulder diameter 90.0 mm, Thread specifications at both ends M20×1.5, bearing inner diameter 75.0 mm, outer diameter 130.0 mm, width 35.0 mm, oil seal inner diameter 80.0 mm, outer diameter 110.0 mm, height 12.0 mm, matching mounting hole diameter 130.0 mm (tolerance H7)

Performance Parameters: Shaft material: 42CrMo alloy steel (tempered hardness HRC 28-32, surface hardened HRC 52-56), bearing material: GCr15 (hardness HRC 60-64), oil seal material: nitrile rubber (oil resistance temperature -40℃ to +120℃); torque transmission capacity ≥800 N・m, radial load ≥60 kN, axial load ≥25 kN, suitable speed ≤4000 rpm, wear life ≥10000 hours, coaxiality ≤0.03 mm, sealing rating IP67Cat® …Structure and Adaptability
Integrated Design: The shaft, tapered roller bearings, oil seals, and keyways are assembled as a single unit. The tapered roller bearings can simultaneously withstand radial and axial loads, making it suitable for transmission components requiring combined loads, such as gearboxes and drive axles, reducing assembly errors and improving transmission accuracy.

Precise Positioning and Sealing: The shaft shoulder and keyway achieve circumferential and axial positioning. The double-lip oil seal effectively prevents oil leakage and dust intrusion, making it suitable for long-term use under harsh conditions and reducing maintenance frequency.

Medium-High-Speed ​​Heavy-Duty Adaptability: The shaft undergoes tempering and surface hardening treatment, resulting in high strength and fatigue resistance. It is suitable for gearboxes, drive axles, and hydraulic pump power input/output terminals of Cat 320D2, 336D2, and 966M models, stably transmitting torque and withstanding combined loads.

Installation and Maintenance Points (Original Data)

Installation: Clean the shaft assembly and mounting area. Use heat-fitted bearings (temperature ≤100℃) or cold-pressed assembly. Tighten bolts to 180-200 N·m, ensuring the shaft shoulder fits snugly against the mounting face. Coaxiality ≤0.04 mm. Bearing outer ring and housing clearance 0.01-0.03 mm.

Maintenance: Check the oil seal condition and bearing clearance every 2500 hours. Replace the bearing if the clearance is ≥0.10 mm or the oil seal is leaking. Regularly check shaft wear; replace the shaft immediately if wear is ≥0.2 mm to prevent abnormal transmission noise or power transmission failure.