CAT 4J-3363 9.525mm Roller Bearing

CAT 4J-3363 is a Caterpillar genuine single-row radial ball bearing, suitable for auxiliary transmission or accessory drive components of engines and tracked loaders. The following are core original specifications and application information; replacement parts are not included.

Core Technical Parameters

Item Details
Part Model: CAT 4J-3363 (BEARING – SINGLE ROW BALL)

Product Type: Single-row deep groove ball bearing, sealless and flangeless, suitable for low-load radial positioning and rotational applications

Material: Inner/Outer Ring: High-carbon chromium bearing steel (52100); Balls: Chromium steel; Cage: Stamped low-carbon steel

Surface Treatment: Inner/Outer Ring: Quenched and tempered (HRC 60–64); Balls: Precision ground; Surface roughness Ra ≤ 0.08 μm

Hardness: Inner/Outer Ring: HRC 60–64; Balls: HRC 62–66; Coefficient of friction: 0.001–0.002 (lubricated condition)

Weight: Approx. 0.05 kg (0.1 lbs)

Key Dimensions: Inner diameter 15 mm, outer diameter 35 mm, width 11 mm, suitable for small-diameter shaft end positioning and transmission

Match Requirements: Suitable for shaft diameter tolerances h6, mounting hole tolerance H7, recommended radial clearance 0.01–0.02 mm
Operating temperature -40℃ ~ +120℃
Load capacity: Rated dynamic load ≥ 4.2 kN, rated static load ≥ 1.8 kN, suitable for low-speed, low-impact auxiliary transmission conditions
Lubrication method: Primarily grease lubrication, CAT-specific lithium-based grease recommended, filling amount 1/3–1/2 of the bearing cavity
Sealing compatibility: Compatible with rubber seals, can be used with CAT 7N-7796 bushings and other components to improve protection
Structure and core characteristics: Single-row deep groove structure: Compact structure, inner/outer rings and steel balls precisely fit, can withstand radial loads and slight bidirectional axial loads, suitable for engine accessory drives and small transmission parts of tracked loaders, ensuring smooth operation of components.

High Precision, Low Friction: The bearing steel is quenched and tempered, resulting in excellent hardness and wear resistance. The stamped steel cage guides the even distribution of steel balls, reducing friction and vibration, making it suitable for continuous operation under low speed and low load conditions.

High Compatibility: Compatible with Caterpillar 3116, 3306, and other engines, as well as auxiliary drives, oil pump drives, or idler wheel axle ends of tracked loaders such as the 963B and 973, offering high versatility.

Compatible Models and Application Scenarios:

Engines: 3116, 3306, and other models; used in accessory drive axle ends, idler wheel axle ends, etc., providing radial positioning and rotational support, reducing axle end wear and vibration.

Tracked Loaders: 963B, 973, and other models; compatible with small axle ends of auxiliary drive systems, ensuring smooth transmission and resolving abnormal noise and vibration problems caused by bearing wear.

Core applications: Used for shaft end positioning and rotation support under low speed and low load conditions, adaptable to auxiliary transmission or accessory drive conditions, extending component service life and ensuring stable equipment operation.