CAT 481-2040 BEARING-BALL

CAT 481-2040 is a Caterpillar deep groove ball bearing, suitable for hydraulic pump/fan drive shafts in equipment such as mini excavators and loaders. It can withstand radial loads and allow slight axial displacement, ensuring smooth operation of rotating parts. It has strong adaptability and durability. The following are the core information and key points:

Core Technical Parameters

Item Details
Part Model CAT 481-2040 (4812040) Deep Groove Ball Bearing, used for hydraulic pump input shaft/fan drive shaft, suitable for small engineering machinery transmission systems, reducing rotational resistance

Material Inner/outer rings are chromium bearing steel (GCr15), balls are chromium steel, cage is stamped steel plate/reinforced nylon, seal is nitrile rubber (NBR), grease is lithium-based grease (NLGI 2), temperature resistance -40℃ to 120℃

Key Dimensions Inner diameter 35mm, outer diameter 72mm, width 23mm, ball diameter 12.7mm, contact angle 0°, clearance class C3, suitable shaft diameter 35.01-35.03mm, mounting hole diameter 72H7, installation tolerance ±0.02mm

Compatible Models CAT 305.5E2/306 For excavators, 906M/907M loaders, and C2.2/C3.3 engines, this seal is used for hydraulic pump input shafts, fan drive shafts, and generator pulleys. It comes with 481-2041 seals and 481-2042 bushings, suitable for speeds ≤3000rpm.

Performance Parameters: Radial rated load 19.4kN, Axial rated load 6.5kN, Limiting speed (grease lubrication) 6000rpm, Operating temperature -40℃ to 120℃, Coefficient of friction ≤0.0015, Lubrication cycle 1000 working hours.

Core Functions and Structural Features:

Radial Load Capacity: The deep groove ball joint structure is suitable for the radial load of the hydraulic pump/fan drive shaft, withstanding low to medium impact vibrations, ensuring smooth component rotation, and reducing energy consumption and wear.

Low Friction Seals: Stamped steel plate/nylon cage reduces friction; NBR seals prevent dust and mud intrusion; lithium-based grease provides long-lasting lubrication, suitable for harsh outdoor conditions, and has a long maintenance cycle. Easy Installation: Standard size fits the original mounting base; cold press installation is sufficient, no additional adjustments required. Dimensional accuracy is consistent with the original, and rotating parts operate smoothly without jamming or abnormal noise after installation.

High Compatibility: Compatible with small engineering machinery transmission systems. Rotating parts operate smoothly after installation, with no abnormal wear, extending component lifespan.