CAT 458-9963 Needle Roller Bearing

CAT 458-9963 is a Caterpillar stamped outer ring needle roller bearing (full complement needle roller structure with cage), primarily designed for small-space, high radial load applications. It is suitable for compact components such as gearboxes, hydraulic pumps, and connecting rods in construction machinery. The following is a structured technical and application information.

Core Technical Parameters

Item Details
Basic Attributes Model 458-9963, type is stamped outer ring needle roller bearing with cage, material is bearing steel (chromium content 1.4-1.65%), outer ring is low carbon steel stamped, cage is engineering plastic, single weight is about 0.8 kg, working temperature -30℃ to +120℃, lubrication method is grease lubrication (NLGI 2 lithium-based grease) or oil lubrication (ISO VG 68 anti-wear hydraulic oil), fit tolerance: inner diameter H7, outer diameter g6, surface roughness Ra≤0.4 μm

Key Dimensions Inner diameter 60 mm, outer diameter 72 mm, total width 30 mm, needle roller diameter 3 mm, number of needle rollers 24, radial clearance 0.08-0.12 mm, chamfer 1×45°, compatible shaft diameter 60 mm, mounting hole diameter 72 mm (H7)

Compatible Models and Locations Compatible with Cat For use in 320GC and 323GC excavators, 938M loaders, 777G mining trucks, etc., this product is installed on hydraulic pump drive shafts, gearbox planetary gear shafts, steering system connecting rod shafts, etc., one unit per shaft, for bearing heavy radial loads in compact spaces.

Performance Parameters: Radial rated static load ≥650 kN, radial rated dynamic load ≥320 kN, maximum permissible linear velocity ≤3 m/s, coefficient of friction ≤0.003 (oil film lubrication), fatigue life ≥8000 hours, limiting speed 3000 rpm (oil lubrication) / 2000 rpm (grease lubrication)

Structural and Performance Advantages:
Compact design: Small needle roller diameter and large quantity, achieving a larger inner diameter and radial load capacity with the same outer diameter, suitable for space-constrained parts, such as gearbox planetary gear trains, connecting rod shafts, etc., with a load capacity more than 30% higher than ball bearings of the same size.

Stamped Outer Ring: The low-carbon steel stamped outer ring is lightweight and low-cost. It features a lubrication groove for easy grease storage and distribution, suitable for intermittent lubrication conditions. The inner ring can directly mate with a hardened journal (journal hardness ≥ HRC 58).

Optimized Cage: The engineering plastic cage separates the needle rollers, reducing friction and wear, preventing needle roller tilting and jamming, suitable for medium- and high-speed operation, and improving bearing life and stability.

High Load Capacity: The large contact area between the needle rollers and the journal results in low load per unit area, suitable for bearing impact radial loads, such as hydraulic pump startup and gearbox shifting.

Installation and Maintenance Points:
Installation Procedure: Clean the journal and mounting hole. The journal hardness should be ≥ HRC 58, and the surface roughness Ra ≤ 0.4 μm. Press the bearing into the mounting hole using the cold pressing method (interference 0.01-0.02 mm). Do not strike the outer ring. After installation, check the radial clearance and end face runout (≤ 0.02 mm). Apply grease or connect the oil lines. Ensure adequate lubrication before trial operation.

Maintenance Cycle: Check lubrication status and replenish grease every 800 hours; check bearing temperature (≤80℃) and vibration every 2000 hours; disassemble and inspect every 3500 hours, replacing bearings when needle rollers or outer rings are worn; for harsh operating conditions, shorten the maintenance cycle to 500 hours.

Common Faults and Solutions: Excessive temperature rise is often due to insufficient lubrication, requiring increased oil supply or replacement with higher viscosity oil; abnormal noise is often due to worn needle rollers or damaged cages, requiring bearing replacement; jamming is often due to foreign object intrusion, requiring improved sealing and cleaning.