CAT 592-9357 42.4mm Inner Diameter Needle Bearing

CAT 592-9357 is a Caterpillar full complement needle roller bearing (needle roller cage assembly) with no inner ring. It has an inner diameter of 42.4 mm and is suitable for eccentric shafts, planetary gear shafts, or rocker arm shafts in Cat C7.1/C9 engines, 320D/336D excavator hydraulic pumps, 966K loader gearboxes, and 140M grader transfer cases. It is used to withstand medium-to-high speed, heavy radial loads, limit radial runout, and is suitable for oil-lubricated conditions. Rated radial load ≥95 kN, limiting speed 5200 rpm, fatigue life ≥8000 hours, ensures smooth operation of rotating parts, and prevents increased clearance or seal failure in the transmission system (Cat® Parts). The following is structured technical and application information:

Core Technical Parameters
Item Details
Basic Attributes
Model 592-9357, full complement needle roller bearing without inner ring (including needle rollers, cage, and seal), suitable for Cat C7.1/C9 engine camshafts, 320D/336D excavator hydraulic pump eccentric shafts, 966K loader gearbox planetary gear shafts, and 140M grader transfer case rocker arm shafts. Material is GCr15 chromium bearing steel (integral quenching HRC 60-64). Cage is phenolic resin, seal is nitrile rubber (NBR). Operating temperature: -40℃ to +120℃. Single weight: approximately 0.42 kg. Suitable for SAE 15W-40 diesel engine oil lubrication. Rated radial load ≥95 kN, limiting speed 5200 rpm, fatigue life ≥8000 hours. Used to bear radial loads, limit radial runout, and ensure smooth operation of rotating parts.

Key Dimensions
Inner Diameter 42.40 mm (tolerance F6, +0.040/+0.025 mm), outer diameter 55.00 mm (tolerance h6, 0/-0.019 mm), width 28.00 mm (tolerance ±0.10 mm), needle roller diameter 3.00 mm (42 pieces), needle roller length 26.00 mm, radial clearance C2 (0.015-0.030 mm), shaft fit tolerance k6 (+0.018/+0.001 mm), bearing housing fit tolerance H7 (+0.030/0 mm). Material and process: GCr15 chromium bearing steel → cold drawing → quenching (840℃ oil quenching) → low-temperature tempering (150℃) → precision grinding → assembly (full complement needle rollers + phenolic resin cage + NBR seal) → rust prevention treatment, hardened layer depth 1.8-2.2 mm. With a diameter of 42.4 mm, it possesses high hardness, high wear resistance, and fatigue resistance, suitable for medium- and high-speed, medium- and heavy-duty working conditions, and can withstand pure radial loads.

Compatible models: Cat C7.1/C9 engines, 320D/336D excavators, 966K loaders, 140M graders, 420F backhoe loaders. Used in camshafts, hydraulic pump eccentric shafts, gearbox planetary gear shafts, transfer case rocker arm shafts, etc., it withstands radial loads, limits radial runout, and ensures smooth operation of components.

Assembly fit: Compatible with 42.4 mm diameter shafts (tolerance k6, +0.018/+0.001 mm), bearing outer diameter and bearing housing fit tolerance H7 (+0.030/0 mm), bearing end face and mounting surface contact area ≥90%, radial clearance controlled within 0.015-0.030 mm after installation, compatible with M16×1.5 bolts (grade 10.9, preload torque 80-90). N·m) Installation and Maintenance Points: Before installation, clean the bearing, journal, and bearing housing. Check for scratches, rust, and cracks on the surfaces. Measure the bearing inner diameter and journal diameter, and the bearing outer diameter and bearing housing inner diameter to ensure the fit meets requirements. The bearing housing surface roughness Ra ≤ 1.6 μm, the end face should be flat and free of deformation, and the journal fillet radius ≤ 1.5 mm to avoid stress concentration at the needle roller ends.

Use the cold mounting method for installation, ensuring the bearing and journal are coaxial. Do not directly strike the bearing end face with a hammer to prevent damage to the needle rollers or cage. After installation, check the bearing’s rotational flexibility to ensure there is no jamming or abnormal noise, and the radial clearance meets C2 requirements.

Maintenance Recommendations: Check the bearing’s wear condition every 2000 hours. If the raceway wear > 0.10 mm or needle roller pitting, cage deformation, or aging seals are observed, replace the bearing immediately. Regularly change the machine oil to keep it clean and prevent oil contamination from accelerating bearing wear, affecting rotational accuracy and load-bearing capacity.