CAT 154-8256 BEARING-ROLL

CAT 154-8256 is a Caterpillar genuine single-row cylindrical roller bearing with cage, suitable for power transmission systems such as gearboxes and drive axles. It is used to withstand medium to heavy radial loads and accommodate minor axial displacement of the shaft, ensuring smooth operation under high load conditions. The following are the key information.

Core Technical Parameters

Item Details
Part Model: CAT 154-8256 (Single Row Cylindrical Roller Bearing, GCr15SiMn Bearing Steel, Stamped Steel Cage, Outer Ring with Lubrication Groove, Separable Inner Ring)

Material: Bearing steel matrix, Hardness HRC 61-65, Tensile Strength ≥ 1900 MPa, Contact Fatigue Life ≥ 1200 hours, Suitable for -40℃ to +120℃ operating conditions

Key Dimensions: Inner Diameter 70 mm (2.7559 in), Outer Diameter 110 mm (4.3307 in), Width 25 mm (0.9843 in), Chamfer Radius 2 mm, Lubrication Groove Diameter 90 mm

Single Weight: Approx. 0.98 kg (2.1605 lbs)

Tolerances and Performance: Inner Diameter Tolerance 0/-0.018 mm, Outer Diameter Tolerance +0.018/0 mm, Radial Clearance C3 (0.035-0.055 mm), rated radial load 85 kN, rated axial load 12 kN, limiting speed 4500 rpm (grease lubrication)

Core Functions: Bears medium to heavy radial loads on gearbox gear shafts, drive axle half shafts, etc.; adaptable to slight axial displacement of the shaft (≤0.5 mm), reducing friction during high-speed operation and suppressing vibration and noise.

Structure and Core Functions:

Separable Structure: The inner ring is separable for easy installation and disassembly, suitable for applications where the shaft and bearing housing are assembled separately, improving maintenance efficiency.

Cylindrical Roller Bearing: The rollers and raceways have linear contact, providing strong radial load capacity, suitable for medium to heavy loads (≤85 kN) and medium to low speed (≤3000 rpm) operating conditions, with excellent shock and vibration resistance.

Lubrication and Sealing: The outer ring has lubrication grooves and oil holes, suitable for forced lubrication systems, with a lubrication cycle of 500 hours; both sides are sealed with nitrile rubber (NBR), IP65 protection rating, preventing dust and moisture intrusion and extending bearing life. Cage Design: The stamped steel cage evenly separates the rollers, reducing friction and wear between them, improving operational smoothness, and lowering noise (≤75 dB).

Compatible Models and Applications

Compatible Equipment: Gearboxes and drive axle systems of CAT 950M/962M loaders, 320D/323D excavators, and 420F2 backhoe loaders.

Core Applications: Installed on the gearbox input shaft, output shaft, and drive axle half-shafts, etc., to support gear shaft rotation, withstand radial loads, and compensate for minor axial displacements caused by installation errors, ensuring efficient operation of the power transmission system.