CAT 282-2574 Needle Roller and Cage Assembly

CAT 282-2574 is a Caterpillar genuine double-row tapered roller bearing with a stamped steel cage (bearing isolator). It is used in double-row tapered roller bearings for gearboxes and drive axle main reducers. It precisely separates the rollers and guides their even distribution, ensuring stable high-speed bearing operation. The following are the key details.

Core Technical Parameters

Item Details
Part Model: CAT 282-2574 (Double-row tapered roller bearing cage, stamped low-carbon steel integral molding, with double-row roller positioning pockets and axial guide edges)

Material: SPCC low-carbon steel, thickness 1.2 mm, surface galvanized and passivated, tensile strength ≥ 345 MPa, hardness HV 180-220, suitable for -40℃ to +150℃ operating conditions

Key Dimensions: Suitable bearing inner diameter 85 mm (3.346 in), outer diameter 150 mm (5.906 in), pocket diameter 16 mm (suitable roller diameter), double-row pocket center distance 20 mm, overall height 28 mm (1.102 in)

Single Weight: Approx. 0.42 kg (0.926 lbs)

Tolerances and Forms: Pocket diameter tolerance ±0.05 mm, pocket pitch circle diameter tolerance ±0.10 mm mm, double-row parallelism ≤ 0.08 mm, axial runout ≤ 0.10 mm

Core Functions: Separates double-row rollers to prevent contact wear, guides rollers to roll evenly along the raceway, balances load distribution, suppresses vibration and noise, suitable for medium- and high-speed, alternating load conditions.

Structure and Core Functions:

Precise Roller Separation: Double-row integrated stamped pockets with a clearance fit (0.03-0.05 mm) prevent rollers from rubbing against each other, reducing operating temperature rise, suitable for speed conditions of 0-3000 rpm.

Uniform Load Distribution: The pocket pitch circle is coaxial with the bearing raceway, guiding the rollers to bear load evenly, reducing local stress concentration, improving the bearing’s impact resistance, suitable for heavy-load conditions of drive axle main reducers.

Axial Positioning and Anti-migration: The axial guide edge fits against the bearing’s inner and outer ring retainers, limiting the axial movement of the cage (≤0.05 mm), preventing roller tilting, and ensuring bearing rotational accuracy.

Lightweight and High-Strength: The one-piece stamping process reduces the weight by 30% compared to casting, while maintaining sufficient rigidity to withstand high-frequency vibration and reduce energy consumption.

Compatible Machines and Applications

Compatible Equipment: CAT 950M/966M loaders, 320D/323D excavators, D6K bulldozers, and the transmission and drive axle main reducer of the 777 mining dump truck (double-row tapered roller bearing).

Core Applications: Installed inside the double-row tapered roller bearing, it separates and guides the double-row rollers, suitable for heavy-duty, medium-to-high-speed rotating components, such as the input shaft of the main reducer and differential housing bearings.