CAT 068-9050 BEARING

CAT 068-9050 is a Caterpillar genuine single-row cylindrical roller bearing (with cage, separable inner/outer rings), suitable for high-speed, heavy-duty rotating parts in engines and transmission systems. It can withstand strong pure radial loads and accommodates axial displacement due to thermal expansion and contraction of the shaft. The following are the original core specifications and application information, excluding replacement parts.

Core Technical Parameters

Item Details
Part Model: CAT 068-9050 (Single Row Cylindrical Roller Bearing, Type N, No Flange Inner Ring, Stamped Steel Cage)

Material: Inner Ring / Outer Ring / Rolling Elements: 52100 Chromium Bearing Steel, Hardened to HRC 60-64; Cage: SPCC Stamped Steel Plate, Surface Passivated; Outer Ring with Lubrication Groove, Suitable for Oil or Grease Lubrication

Key Dimensions: Inner Diameter 38.1 mm (1.500 in), Outer Diameter 69.85 mm (2.750 in), Width 19.05 mm (0.750 in), Roller Diameter 7.94 mm, Number of Rollers: 14, Chamfer Radius 1.2 mm

Single Weight: Approx. 0.38 kg (0.838 lbs)

Tolerance Standards: Inner Diameter Tolerance P6 (+0.018/0 mm), Outer Diameter Tolerance P6 (0/-0.025 mm), width tolerance ±0.12 mm, radial clearance C3 (0.015-0.028 mm), clearance compensation for heavy-duty applications.

Core Features: Dynamic load capacity 48 kN, static load capacity 55 kN, limiting speed 5200 rpm (oil lubrication) / 3600 rpm (grease lubrication), operating temperature -40℃ to +120℃, allowable axial displacement of the shaft relative to the bearing ≤ 5 mm, adaptable to the thermal expansion and contraction requirements of the transmission system.

Structure and Core Functions: Radial heavy-duty adaptation: Roller and raceway line contact design, large bearing area, suitable for pure radial heavy load conditions such as engine crankshafts and gearbox output shafts, dispersing local stress and reducing the risk of fatigue damage.

Axial displacement compensation: N-type flangeless inner ring structure, allowing a small amount of axial displacement of the shaft relative to the bearing in the width direction, compensating for thermal expansion and contraction during equipment operation, and avoiding shaft jamming and additional stress.

High-Speed ​​and Stable Operation: The lightweight design of the stamped steel plate cage reduces the interference of centrifugal force on the roller motion, adapting to the high-speed rotation requirements of the transmission system, reducing operating noise and vibration, and improving mechanism stability.

Lubrication Compatibility: The outer ring has axial lubrication grooves, suitable for oil or grease lubrication, ensuring sufficient lubrication between the rollers and raceways, reducing friction and wear, extending bearing life, and suitable for the dusty and high-vibration operating environments of construction machinery.

Compatible Models and Application Scenarios:
Compatible Equipment: CAT 3054, 3056 engines, 908, 914G mini loaders, 416B, 420D backhoe loaders, CB-424, CB-434 road rollers, etc.

Core Applications: Installed on engine camshafts, crankshaft balance shafts, gearbox intermediate shafts, drive axle differential half-shafts, etc., to bear radial heavy loads and compensate for axial displacement, adapting to high-speed rotation and impact load conditions, ensuring equipment power transmission efficiency and component durability.